/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:01:07,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:01:07,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:01:07,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:01:07,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:01:07,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:01:07,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:01:07,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:01:07,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:01:07,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:01:07,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:01:07,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:01:07,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:01:07,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:01:07,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:01:07,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:01:07,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:01:07,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:01:07,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:01:07,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:01:07,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:01:07,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:01:07,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:01:07,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:01:07,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:01:07,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:01:07,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:01:07,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:01:07,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:01:07,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:01:07,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:01:07,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:01:07,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:01:07,860 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:01:07,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:01:07,861 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:01:07,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:01:07,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:01:07,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:01:07,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:01:07,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:01:07,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:01:07,862 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:01:07,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:01:07,863 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:01:07,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:01:07,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:01:07,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:01:07,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:01:07,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:01:07,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:07,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:01:07,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:01:07,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:01:07,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:01:07,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:07,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:01:07,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:01:07,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:01:08,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:01:08,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:01:08,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:01:08,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:01:08,181 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:01:08,182 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c40.c [2020-07-21 14:01:08,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a30cbc5/2d5e2c4e4fa341c79575c20c41d914b7/FLAGc8a1c9694 [2020-07-21 14:01:08,775 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:01:08,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c40.c [2020-07-21 14:01:08,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a30cbc5/2d5e2c4e4fa341c79575c20c41d914b7/FLAGc8a1c9694 [2020-07-21 14:01:09,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61a30cbc5/2d5e2c4e4fa341c79575c20c41d914b7 [2020-07-21 14:01:09,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:01:09,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:01:09,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:09,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:01:09,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:01:09,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d436f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09, skipping insertion in model container [2020-07-21 14:01:09,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:01:09,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:01:09,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:09,384 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:01:09,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:09,432 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:01:09,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09 WrapperNode [2020-07-21 14:01:09,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:09,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:01:09,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:01:09,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:01:09,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... [2020-07-21 14:01:09,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:01:09,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:01:09,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:01:09,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:01:09,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:01:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:01:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:01:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:01:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:01:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:01:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 14:01:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 14:01:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:01:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 14:01:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:01:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 14:01:09,879 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:01:09,880 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:01:09,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:09 BoogieIcfgContainer [2020-07-21 14:01:09,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:01:09,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:01:09,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:01:09,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:01:09,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:01:09" (1/3) ... [2020-07-21 14:01:09,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4734e7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:09, skipping insertion in model container [2020-07-21 14:01:09,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:09" (2/3) ... [2020-07-21 14:01:09,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4734e7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:09, skipping insertion in model container [2020-07-21 14:01:09,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:09" (3/3) ... [2020-07-21 14:01:09,893 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c40.c [2020-07-21 14:01:09,907 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:01:09,915 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:01:09,931 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:01:09,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:01:09,961 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:01:09,961 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:01:09,961 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:01:09,961 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:01:09,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:01:09,962 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:01:09,962 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:01:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 14:01:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 14:01:09,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:09,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:09,991 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1526440521, now seen corresponding path program 1 times [2020-07-21 14:01:10,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:10,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099781598] [2020-07-21 14:01:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:10,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:10,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:01:10,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:10,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:10,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099781598] [2020-07-21 14:01:10,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:10,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:01:10,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268411429] [2020-07-21 14:01:10,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:01:10,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:01:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:01:10,209 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-07-21 14:01:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:10,262 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-07-21 14:01:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:01:10,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 14:01:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:10,274 INFO L225 Difference]: With dead ends: 37 [2020-07-21 14:01:10,275 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 14:01:10,279 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 14:01:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 14:01:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 14:01:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 14:01:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 14:01:10,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 14:01:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:10,319 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 14:01:10,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:01:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 14:01:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:01:10,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:10,321 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:10,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:10,523 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1999502604, now seen corresponding path program 1 times [2020-07-21 14:01:10,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:10,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607588792] [2020-07-21 14:01:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:10,596 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:10,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:10,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 14:01:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:10,703 INFO L350 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2020-07-21 14:01:10,704 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2020-07-21 14:01:10,706 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:10,719 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:01:10,723 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 14:01:10,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:34 [2020-07-21 14:01:10,871 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:01:10,872 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 111 [2020-07-21 14:01:10,881 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:10,883 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:01:10,888 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:11,018 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-07-21 14:01:11,019 INFO L624 ElimStorePlain]: treesize reduction 40, result has 68.5 percent of original size [2020-07-21 14:01:11,030 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,033 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 14:01:11,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:87 [2020-07-21 14:01:11,039 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,101 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,120 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,137 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,142 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,148 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,153 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,158 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,163 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:11,215 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 14:01:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:01:11,224 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 14:01:11,256 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:01:11,257 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2020-07-21 14:01:11,260 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:11,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-07-21 14:01:11,270 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:01:11,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:01:11,284 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 14:01:11,289 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 14:01:11,291 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2020-07-21 14:01:11,292 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:11,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-07-21 14:01:11,299 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:11,333 INFO L624 ElimStorePlain]: treesize reduction 36, result has 34.5 percent of original size [2020-07-21 14:01:11,335 INFO L544 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 14:01:11,335 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:177, output treesize:4 [2020-07-21 14:01:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:11,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:15,006 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 14:01:15,043 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:01:15,043 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2020-07-21 14:01:15,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:01:15,053 INFO L440 ElimStorePlain]: Different costs {0=[v_arrayElimCell_10], 2=[v_arrayElimCell_9]} [2020-07-21 14:01:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:01:15,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607588792] [2020-07-21 14:01:15,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:15,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-21 14:01:15,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566444605] [2020-07-21 14:01:15,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 14:01:15,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:15,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 14:01:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=73, Unknown=5, NotChecked=0, Total=110 [2020-07-21 14:01:15,162 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2020-07-21 14:01:17,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:17,227 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-21 14:01:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 14:01:17,228 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-07-21 14:01:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:17,229 INFO L225 Difference]: With dead ends: 22 [2020-07-21 14:01:17,229 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 14:01:17,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=46, Invalid=105, Unknown=5, NotChecked=0, Total=156 [2020-07-21 14:01:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 14:01:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 14:01:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 14:01:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 14:01:17,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-21 14:01:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:17,236 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 14:01:17,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 14:01:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 14:01:17,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 14:01:17,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:17,237 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:17,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:17,444 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:17,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1114495599, now seen corresponding path program 2 times [2020-07-21 14:01:17,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:17,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446064013] [2020-07-21 14:01:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:17,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:17,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:01:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:17,519 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2020-07-21 14:01:17,520 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 14:01:17,538 INFO L624 ElimStorePlain]: treesize reduction 14, result has 53.3 percent of original size [2020-07-21 14:01:17,543 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2020-07-21 14:01:17,544 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:17,549 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:01:17,551 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 14:01:17,551 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:17 [2020-07-21 14:01:19,583 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 14:01:19,632 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2020-07-21 14:01:19,633 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:01:19,639 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:01:19,640 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 14:01:19,641 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:8 [2020-07-21 14:01:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 14:01:19,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:19,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446064013] [2020-07-21 14:01:19,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:19,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:01:19,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432084237] [2020-07-21 14:01:19,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:01:19,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:01:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:01:19,660 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2020-07-21 14:01:21,695 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 14:01:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:21,697 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-07-21 14:01:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:01:21,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 14:01:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:21,697 INFO L225 Difference]: With dead ends: 17 [2020-07-21 14:01:21,697 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 14:01:21,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:01:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 14:01:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 14:01:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 14:01:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 14:01:21,699 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-21 14:01:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:21,699 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 14:01:21,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:01:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 14:01:21,699 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 14:01:21,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:21,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 14:01:23,985 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 14:01:28,025 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 14:01:32,056 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 14:01:32,059 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:01:32,059 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:01:32,059 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:01:32,060 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 14:01:32,060 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (exists ((|~#y~0.base| Int)) (and (not (= |~#x~0.base| |~#y~0.base|)) (= ((as const (Array Int Int)) 0) (select |#memory_int| |~#y~0.base|)))) (<= ~i~0 0) (= ((as const (Array Int Int)) 0) (select |#memory_int| |~#x~0.base|)) (= 0 (select (select |#memory_int| |~#y~0.base|) (+ |~#y~0.offset| ~i~0)))) [2020-07-21 14:01:32,060 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 14:01:32,060 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 14:01:32,061 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 23) no Hoare annotation was computed. [2020-07-21 14:01:32,061 INFO L268 CegarLoopResult]: For program point L19(lines 19 20) no Hoare annotation was computed. [2020-07-21 14:01:32,061 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 23) no Hoare annotation was computed. [2020-07-21 14:01:32,061 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2020-07-21 14:01:32,062 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 8 23) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (and (exists ((.unlet.0 Int)) (and (not (= |~#x~0.base| .unlet.0)) (= ((as const (Array Int Int)) 0) (select |#memory_int| .unlet.0)))) (<= ~i~0 0) (= .cse0 (select |#memory_int| |~#x~0.base|)) (= 0 (select (select |#memory_int| |~#y~0.base|) (+ |~#y~0.offset| ~i~0)))) (not (= (select (select |old(#memory_int)| |~#y~0.base|) (+ |~#y~0.offset| |old(~i~0)|)) 0)) (not (= .cse0 (select |old(#memory_int)| |~#x~0.base|))) (forall ((.unlet.1 Int)) (or (= .unlet.1 |~#x~0.base|) (not (= ((as const (Array Int Int)) 0) (select |old(#memory_int)| .unlet.1))))) (not (<= |old(~i~0)| 0)))) [2020-07-21 14:01:32,062 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-21 14:01:32,062 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-21 14:01:32,062 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2020-07-21 14:01:32,062 INFO L268 CegarLoopResult]: For program point L12-1(lines 12 15) no Hoare annotation was computed. [2020-07-21 14:01:32,063 INFO L264 CegarLoopResult]: At program point L12-3(lines 12 15) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (= (select (select |old(#memory_int)| |~#y~0.base|) (+ |~#y~0.offset| |old(~i~0)|)) 0)) (and (exists ((.unlet.2 Int)) (and (not (= |~#x~0.base| .unlet.2)) (= ((as const (Array Int Int)) 0) (select |#memory_int| .unlet.2)))) (<= ~i~0 0) (= .cse0 (select |#memory_int| |~#x~0.base|))) (not (= .cse0 (select |old(#memory_int)| |~#x~0.base|))) (forall ((.unlet.3 Int)) (or (= .unlet.3 |~#x~0.base|) (not (= ((as const (Array Int Int)) 0) (select |old(#memory_int)| .unlet.3))))) (not (<= |old(~i~0)| 0)))) [2020-07-21 14:01:32,063 INFO L268 CegarLoopResult]: For program point L12-4(lines 12 15) no Hoare annotation was computed. [2020-07-21 14:01:32,070 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:446) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:135) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:693) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:217) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-21 14:01:32,074 INFO L168 Benchmark]: Toolchain (without parser) took 22905.92 ms. Allocated memory was 138.9 MB in the beginning and 236.5 MB in the end (delta: 97.5 MB). Free memory was 103.4 MB in the beginning and 115.4 MB in the end (delta: -12.0 MB). Peak memory consumption was 85.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:32,075 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 14:01:32,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.45 ms. Allocated memory is still 138.9 MB. Free memory was 103.2 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:32,080 INFO L168 Benchmark]: Boogie Preprocessor took 149.19 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 181.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:32,081 INFO L168 Benchmark]: RCFGBuilder took 299.39 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 167.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:32,082 INFO L168 Benchmark]: TraceAbstraction took 22187.39 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 167.3 MB in the beginning and 115.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:32,086 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.45 ms. Allocated memory is still 138.9 MB. Free memory was 103.2 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.19 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 181.5 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.39 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 167.3 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22187.39 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 167.3 MB in the beginning and 115.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...