/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:19:13,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:19:13,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:19:13,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:19:13,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:19:13,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:19:13,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:19:13,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:19:13,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:19:13,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:19:13,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:19:13,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:19:13,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:19:13,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:19:13,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:19:13,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:19:13,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:19:13,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:19:13,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:19:13,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:19:13,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:19:13,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:19:13,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:19:13,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:19:13,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:19:13,133 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 [2020-07-20 14:19:13,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:19:13,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:19:13,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:19:13,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:19:13,149 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:19:13,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:19:13,150 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:19:13,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:19:13,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:19:13,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:19:13,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:19:13,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:19:13,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:19:13,151 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:19:13,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:19:13,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:19:13,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:19:13,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:19:13,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:19:13,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:19:13,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:19:13,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:19:13,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:19:13,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:19:13,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:19:13,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:19:13,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:13,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:19:13,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:19:13,154 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 -> 4 [2020-07-20 14:19:13,461 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:19:13,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:19:13,478 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:19:13,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:19:13,480 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:19:13,481 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-07-20 14:19:13,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6364019a8/547bc47245414b6e87fad3de3b0a2d6c/FLAG9237290c5 [2020-07-20 14:19:13,986 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:19:13,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-07-20 14:19:13,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6364019a8/547bc47245414b6e87fad3de3b0a2d6c/FLAG9237290c5 [2020-07-20 14:19:14,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6364019a8/547bc47245414b6e87fad3de3b0a2d6c [2020-07-20 14:19:14,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:19:14,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:19:14,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:14,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:19:14,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:19:14,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65a5b008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14, skipping insertion in model container [2020-07-20 14:19:14,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:19:14,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:19:14,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:14,668 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:19:14,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:14,698 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:19:14,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14 WrapperNode [2020-07-20 14:19:14,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:14,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:19:14,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:19:14,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:19:14,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (1/1) ... [2020-07-20 14:19:14,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:19:14,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:19:14,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:19:14,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:19:14,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (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 [2020-07-20 14:19:14,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:19:14,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:19:14,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:19:14,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:19:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:19:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:19:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 14:19:14,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:19:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:19:14,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:19:15,099 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:19:15,100 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:19:15,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:15 BoogieIcfgContainer [2020-07-20 14:19:15,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:19:15,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:19:15,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:19:15,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:19:15,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:19:14" (1/3) ... [2020-07-20 14:19:15,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e17745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:15, skipping insertion in model container [2020-07-20 14:19:15,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:14" (2/3) ... [2020-07-20 14:19:15,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52e17745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:15, skipping insertion in model container [2020-07-20 14:19:15,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:15" (3/3) ... [2020-07-20 14:19:15,113 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-07-20 14:19:15,125 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:19:15,133 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:19:15,149 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:19:15,177 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:19:15,177 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:19:15,177 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:19:15,177 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:19:15,177 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:19:15,178 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:19:15,178 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:19:15,178 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:19:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 14:19:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 14:19:15,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:15,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:15,218 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-07-20 14:19:15,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:15,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446878062] [2020-07-20 14:19:15,241 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 [2020-07-20 14:19:15,316 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:19:15,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:19:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:15,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:15,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446878062] [2020-07-20 14:19:15,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:15,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:19:15,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974370233] [2020-07-20 14:19:15,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:19:15,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:19:15,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:19:15,381 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-20 14:19:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:15,400 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-20 14:19:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:19:15,402 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 14:19:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:15,410 INFO L225 Difference]: With dead ends: 30 [2020-07-20 14:19:15,410 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 14:19:15,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:19:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 14:19:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 14:19:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 14:19:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-20 14:19:15,447 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-20 14:19:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:15,448 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-20 14:19:15,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:19:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-20 14:19:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 14:19:15,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:15,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:15,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:15,669 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-07-20 14:19:15,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:15,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917542304] [2020-07-20 14:19:15,672 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 [2020-07-20 14:19:15,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:19:15,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:15,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:19:15,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:15,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:15,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917542304] [2020-07-20 14:19:15,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:15,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:19:15,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361690157] [2020-07-20 14:19:15,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:19:15,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:15,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:19:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:19:15,777 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-07-20 14:19:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:15,826 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-07-20 14:19:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:19:15,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 14:19:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:15,828 INFO L225 Difference]: With dead ends: 19 [2020-07-20 14:19:15,828 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 14:19:15,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:19:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 14:19:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 14:19:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 14:19:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-20 14:19:15,835 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-07-20 14:19:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:15,836 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-20 14:19:15,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:19:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-20 14:19:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 14:19:15,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:15,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:16,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:16,052 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2020-07-20 14:19:16,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:16,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280338019] [2020-07-20 14:19:16,063 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 [2020-07-20 14:19:16,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:19:16,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:16,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 14:19:16,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:16,189 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:19:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:16,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:19:16,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:16,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280338019] [2020-07-20 14:19:16,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:19:16,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 14:19:16,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812904162] [2020-07-20 14:19:16,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:19:16,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:19:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:19:16,403 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 12 states. [2020-07-20 14:19:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:16,630 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-20 14:19:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:19:16,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-07-20 14:19:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:16,632 INFO L225 Difference]: With dead ends: 33 [2020-07-20 14:19:16,632 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 14:19:16,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-20 14:19:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 14:19:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-20 14:19:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 14:19:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-20 14:19:16,639 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-07-20 14:19:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:16,640 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-20 14:19:16,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:19:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-20 14:19:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 14:19:16,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:16,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:16,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:16,855 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-07-20 14:19:16,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:16,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479162116] [2020-07-20 14:19:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-20 14:19:16,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:19:16,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:19:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:16,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:19:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:16,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479162116] [2020-07-20 14:19:16,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:19:16,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-07-20 14:19:16,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100542121] [2020-07-20 14:19:16,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:19:16,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:16,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:19:16,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:19:16,939 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-07-20 14:19:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:16,975 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-20 14:19:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:19:16,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-20 14:19:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:16,977 INFO L225 Difference]: With dead ends: 30 [2020-07-20 14:19:16,977 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 14:19:16,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:19:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 14:19:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-20 14:19:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 14:19:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 14:19:16,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-07-20 14:19:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:16,983 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 14:19:16,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:19:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 14:19:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 14:19:16,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:16,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:17,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:17,197 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:17,198 INFO L82 PathProgramCache]: Analyzing trace with hash 370288085, now seen corresponding path program 2 times [2020-07-20 14:19:17,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:17,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135790487] [2020-07-20 14:19:17,199 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 [2020-07-20 14:19:17,225 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:17,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 14:19:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:17,338 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 14:19:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:17,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:19:17,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:19:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:19:17,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135790487] [2020-07-20 14:19:17,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:19:17,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-20 14:19:17,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768866283] [2020-07-20 14:19:17,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 14:19:17,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 14:19:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-07-20 14:19:17,738 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2020-07-20 14:19:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:18,445 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-20 14:19:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 14:19:18,446 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2020-07-20 14:19:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:18,447 INFO L225 Difference]: With dead ends: 33 [2020-07-20 14:19:18,447 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 14:19:18,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2020-07-20 14:19:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 14:19:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-07-20 14:19:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 14:19:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-20 14:19:18,454 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-07-20 14:19:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:18,454 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-20 14:19:18,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 14:19:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-20 14:19:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 14:19:18,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:18,456 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:18,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:18,669 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:18,669 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 2 times [2020-07-20 14:19:18,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:18,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037682812] [2020-07-20 14:19:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:18,696 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:18,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:19:18,697 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:19:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:19:18,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:19:18,719 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:19:18,720 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:19:18,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:18,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:19:18 BoogieIcfgContainer [2020-07-20 14:19:18,954 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:19:18,958 INFO L168 Benchmark]: Toolchain (without parser) took 4523.54 ms. Allocated memory was 144.7 MB in the beginning and 246.4 MB in the end (delta: 101.7 MB). Free memory was 100.9 MB in the beginning and 174.5 MB in the end (delta: -73.7 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:18,959 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 14:19:18,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.76 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:18,960 INFO L168 Benchmark]: Boogie Preprocessor took 117.17 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:18,961 INFO L168 Benchmark]: RCFGBuilder took 287.26 ms. Allocated memory is still 201.3 MB. Free memory was 180.9 MB in the beginning and 168.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:18,962 INFO L168 Benchmark]: TraceAbstraction took 3848.61 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 168.1 MB in the beginning and 174.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:18,966 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.76 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.17 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 287.26 ms. Allocated memory is still 201.3 MB. Free memory was 180.9 MB in the beginning and 168.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3848.61 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 168.1 MB in the beginning and 174.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=2, n=4] [L15] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L13] i++ VAL [i=2, n=2, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=4, n=6] [L15] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=4, n=8] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=4, n=-10] [L13] i++ VAL [i=5, n=-10, n=4] [L13] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 24 SDslu, 181 SDs, 0 SdLazy, 262 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 90 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 9270 SizeOfPredicates, 11 NumberOfNonLiveVariables, 152 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 6/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...