/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:37:10,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:37:10,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:37:10,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:37:10,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:37:10,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:37:10,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:37:10,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:37:10,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:37:10,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:37:10,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:37:10,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:37:10,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:37:10,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:37:10,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:37:10,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:37:10,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:37:10,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:37:10,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:37:10,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:37:10,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:37:10,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:37:10,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:37:10,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:37:10,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:37:10,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:37:10,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:37:10,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:37:10,869 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 11:37:10,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:37:10,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:37:10,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:37:10,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:37:10,895 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:37:10,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:37:10,895 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:37:10,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:37:10,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:37:10,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:37:10,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:37:10,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:37:10,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:37:10,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:37:10,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:37:10,898 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:37:10,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:37:10,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:37:10,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:37:10,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:37:10,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:37:10,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:37:10,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:37:10,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:37:10,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:37:10,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:37:10,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:10,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:37:10,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:37:10,901 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 -> NOT_INCREMENTALLY [2020-07-21 11:37:11,176 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:37:11,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:37:11,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:37:11,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:37:11,197 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:37:11,197 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 11:37:11,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125221117/e9adf93a24f6461e97ac70d2d06bcac3/FLAG7ee214c2a [2020-07-21 11:37:11,799 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:37:11,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-21 11:37:11,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125221117/e9adf93a24f6461e97ac70d2d06bcac3/FLAG7ee214c2a [2020-07-21 11:37:12,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125221117/e9adf93a24f6461e97ac70d2d06bcac3 [2020-07-21 11:37:12,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:37:12,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:37:12,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:37:12,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:37:12,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:37:12,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5f7820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12, skipping insertion in model container [2020-07-21 11:37:12,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:37:12,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:37:12,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:37:12,347 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:37:12,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:37:12,391 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:37:12,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12 WrapperNode [2020-07-21 11:37:12,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:37:12,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:37:12,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:37:12,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:37:12,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (1/1) ... [2020-07-21 11:37:12,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:37:12,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:37:12,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:37:12,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:37:12,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (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 11:37:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:37:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:37:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 11:37:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 11:37:12,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:37:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:37:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:37:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 11:37:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:37:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 11:37:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:37:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:37:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:37:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:37:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:37:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:37:12,962 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:37:12,962 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:37:12,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:37:12 BoogieIcfgContainer [2020-07-21 11:37:12,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:37:12,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:37:12,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:37:12,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:37:12,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:37:12" (1/3) ... [2020-07-21 11:37:12,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac9fc68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:37:12, skipping insertion in model container [2020-07-21 11:37:12,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:37:12" (2/3) ... [2020-07-21 11:37:12,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac9fc68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:37:12, skipping insertion in model container [2020-07-21 11:37:12,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:37:12" (3/3) ... [2020-07-21 11:37:12,975 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-21 11:37:12,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:37:12,994 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:37:13,015 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:37:13,057 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:37:13,057 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:37:13,057 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:37:13,057 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:37:13,057 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:37:13,057 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:37:13,057 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:37:13,058 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:37:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-21 11:37:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:37:13,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:13,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:13,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-21 11:37:13,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:13,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612509878] [2020-07-21 11:37:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:37:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:37:13,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:37:13,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:13,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612509878] [2020-07-21 11:37:13,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:13,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:37:13,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574081239] [2020-07-21 11:37:13,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:37:13,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:13,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:37:13,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:37:13,317 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-07-21 11:37:13,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:13,345 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-07-21 11:37:13,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:37:13,347 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-07-21 11:37:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:13,357 INFO L225 Difference]: With dead ends: 67 [2020-07-21 11:37:13,358 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 11:37:13,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:37:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 11:37:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-21 11:37:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:37:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-21 11:37:13,411 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2020-07-21 11:37:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:13,412 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-21 11:37:13,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:37:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-21 11:37:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:37:13,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:13,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:13,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:13,626 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2020-07-21 11:37:13,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:13,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840149872] [2020-07-21 11:37:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:37:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:37:13,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 11:37:13,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:13,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840149872] [2020-07-21 11:37:13,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:13,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:37:13,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062871321] [2020-07-21 11:37:13,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:37:13,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:37:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:37:13,748 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-21 11:37:13,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:13,959 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-07-21 11:37:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:37:13,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-21 11:37:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:13,963 INFO L225 Difference]: With dead ends: 57 [2020-07-21 11:37:13,964 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 11:37:13,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 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 11:37:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 11:37:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-21 11:37:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 11:37:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-21 11:37:13,979 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-21 11:37:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:13,980 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-21 11:37:13,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:37:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-21 11:37:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:37:13,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:13,982 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:14,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:14,188 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:14,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-21 11:37:14,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:14,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533082456] [2020-07-21 11:37:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:37:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:37:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:37:14,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:14,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533082456] [2020-07-21 11:37:14,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:14,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:37:14,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645404819] [2020-07-21 11:37:14,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:37:14,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:14,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:37:14,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:14,347 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 4 states. [2020-07-21 11:37:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:14,432 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-21 11:37:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:37:14,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-07-21 11:37:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:14,434 INFO L225 Difference]: With dead ends: 65 [2020-07-21 11:37:14,434 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 11:37:14,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 11:37:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-21 11:37:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 11:37:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-21 11:37:14,443 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-21 11:37:14,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:14,444 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-21 11:37:14,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:37:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-21 11:37:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 11:37:14,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:14,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:14,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:14,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-21 11:37:14,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:14,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083760214] [2020-07-21 11:37:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:14,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:37:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:37:14,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:37:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:37:14,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083760214] [2020-07-21 11:37:14,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:37:14,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 11:37:14,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059744580] [2020-07-21 11:37:14,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 11:37:14,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:14,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 11:37:14,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:37:14,890 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 8 states. [2020-07-21 11:37:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:15,011 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-21 11:37:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:37:15,012 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-21 11:37:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:15,013 INFO L225 Difference]: With dead ends: 67 [2020-07-21 11:37:15,013 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 11:37:15,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:37:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 11:37:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-21 11:37:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 11:37:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-21 11:37:15,022 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-07-21 11:37:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:15,023 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-21 11:37:15,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 11:37:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-21 11:37:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 11:37:15,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:15,025 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:15,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:15,232 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-07-21 11:37:15,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:15,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884013584] [2020-07-21 11:37:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:15,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:37:15,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 11:37:15,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:15,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884013584] [2020-07-21 11:37:15,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:15,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:37:15,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526241300] [2020-07-21 11:37:15,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:37:15,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:37:15,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:15,322 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-07-21 11:37:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:15,385 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-21 11:37:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:37:15,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-07-21 11:37:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:15,387 INFO L225 Difference]: With dead ends: 65 [2020-07-21 11:37:15,387 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 11:37:15,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 11:37:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-07-21 11:37:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 11:37:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-21 11:37:15,395 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-07-21 11:37:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:15,396 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-21 11:37:15,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:37:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-21 11:37:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 11:37:15,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:15,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:15,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:15,613 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:15,614 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-07-21 11:37:15,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:15,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438040408] [2020-07-21 11:37:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:15,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:37:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-21 11:37:15,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:37:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 11:37:15,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438040408] [2020-07-21 11:37:15,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:37:15,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-07-21 11:37:15,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737080750] [2020-07-21 11:37:15,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 11:37:15,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:15,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 11:37:15,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 11:37:15,809 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-07-21 11:37:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:15,938 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-21 11:37:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:37:15,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-21 11:37:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:15,940 INFO L225 Difference]: With dead ends: 70 [2020-07-21 11:37:15,940 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 11:37:15,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:37:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 11:37:15,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-21 11:37:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 11:37:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-21 11:37:15,948 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-07-21 11:37:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:15,948 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-21 11:37:15,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 11:37:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-21 11:37:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 11:37:15,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:15,950 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:16,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:16,164 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-07-21 11:37:16,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:16,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126222193] [2020-07-21 11:37:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:37:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 11:37:16,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:16,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126222193] [2020-07-21 11:37:16,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:16,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:37:16,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648390786] [2020-07-21 11:37:16,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:37:16,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:37:16,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:16,259 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states. [2020-07-21 11:37:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:16,319 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-07-21 11:37:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:37:16,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-21 11:37:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:16,321 INFO L225 Difference]: With dead ends: 69 [2020-07-21 11:37:16,321 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 11:37:16,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:37:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 11:37:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-21 11:37:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 11:37:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-21 11:37:16,328 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-07-21 11:37:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:16,329 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-21 11:37:16,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:37:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-21 11:37:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 11:37:16,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:16,330 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:16,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:16,544 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:16,544 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-07-21 11:37:16,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:16,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397776832] [2020-07-21 11:37:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:16,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 11:37:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-21 11:37:16,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:37:16,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397776832] [2020-07-21 11:37:16,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:37:16,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 11:37:16,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622715318] [2020-07-21 11:37:16,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:37:16,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:37:16,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:37:16,703 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 9 states. [2020-07-21 11:37:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:17,000 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-21 11:37:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:37:17,001 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-07-21 11:37:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:17,003 INFO L225 Difference]: With dead ends: 74 [2020-07-21 11:37:17,003 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 11:37:17,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:37:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 11:37:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-21 11:37:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 11:37:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-21 11:37:17,014 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-21 11:37:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:17,015 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-21 11:37:17,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:37:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-21 11:37:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 11:37:17,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:17,017 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:17,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:17,231 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-21 11:37:17,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:17,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673266896] [2020-07-21 11:37:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 11:37:17,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 11:37:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:37:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 11:37:17,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673266896] [2020-07-21 11:37:17,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:37:17,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 11:37:17,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090355701] [2020-07-21 11:37:17,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 11:37:17,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:17,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 11:37:17,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 11:37:17,525 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 13 states. [2020-07-21 11:37:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:17,750 INFO L93 Difference]: Finished difference Result 139 states and 179 transitions. [2020-07-21 11:37:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:37:17,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 11:37:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:17,752 INFO L225 Difference]: With dead ends: 139 [2020-07-21 11:37:17,752 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 11:37:17,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:37:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 11:37:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-07-21 11:37:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 11:37:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-07-21 11:37:17,766 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 65 [2020-07-21 11:37:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:17,766 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-07-21 11:37:17,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 11:37:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-07-21 11:37:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 11:37:17,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:17,768 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:17,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:17,978 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-21 11:37:17,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:17,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728679982] [2020-07-21 11:37:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:18,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 11:37:18,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 11:37:18,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:37:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 11:37:18,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728679982] [2020-07-21 11:37:18,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:37:18,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 11:37:18,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934799327] [2020-07-21 11:37:18,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 11:37:18,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 11:37:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 11:37:18,268 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 13 states. [2020-07-21 11:37:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:18,501 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2020-07-21 11:37:18,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:37:18,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-07-21 11:37:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:18,503 INFO L225 Difference]: With dead ends: 129 [2020-07-21 11:37:18,504 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 11:37:18,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:37:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 11:37:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2020-07-21 11:37:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 11:37:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-07-21 11:37:18,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 67 [2020-07-21 11:37:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:18,518 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-07-21 11:37:18,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 11:37:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-07-21 11:37:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 11:37:18,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:18,520 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:18,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:18,734 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-21 11:37:18,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:18,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466933865] [2020-07-21 11:37:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:37:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:37:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:37:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 11:37:18,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:37:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-21 11:37:18,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466933865] [2020-07-21 11:37:18,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:37:18,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 11:37:18,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438393402] [2020-07-21 11:37:18,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 11:37:18,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:37:18,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 11:37:18,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:37:18,939 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-07-21 11:37:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:37:19,065 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-07-21 11:37:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:37:19,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-07-21 11:37:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:37:19,066 INFO L225 Difference]: With dead ends: 86 [2020-07-21 11:37:19,067 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 11:37:19,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:37:19,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 11:37:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-21 11:37:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 11:37:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-07-21 11:37:19,076 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 73 [2020-07-21 11:37:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:37:19,076 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-07-21 11:37:19,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 11:37:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-07-21 11:37:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-21 11:37:19,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:37:19,078 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:37:19,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:19,282 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:37:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:37:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-21 11:37:19,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:37:19,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633459579] [2020-07-21 11:37:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:37:19,373 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:37:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:37:19,510 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:37:19,563 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:37:19,564 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:37:19,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:37:19,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:37:19 BoogieIcfgContainer [2020-07-21 11:37:19,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:37:19,851 INFO L168 Benchmark]: Toolchain (without parser) took 7747.08 ms. Allocated memory was 143.1 MB in the beginning and 266.9 MB in the end (delta: 123.7 MB). Free memory was 103.7 MB in the beginning and 132.2 MB in the end (delta: -28.5 MB). Peak memory consumption was 95.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:19,851 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:37:19,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.15 ms. Allocated memory is still 143.1 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:19,853 INFO L168 Benchmark]: Boogie Preprocessor took 183.34 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 92.9 MB in the beginning and 182.0 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:19,854 INFO L168 Benchmark]: RCFGBuilder took 390.49 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 163.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:19,855 INFO L168 Benchmark]: TraceAbstraction took 6881.01 ms. Allocated memory was 204.5 MB in the beginning and 266.9 MB in the end (delta: 62.4 MB). Free memory was 162.3 MB in the beginning and 132.2 MB in the end (delta: 30.2 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:37:19,858 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 143.1 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.15 ms. Allocated memory is still 143.1 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 183.34 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 92.9 MB in the beginning and 182.0 MB in the end (delta: -89.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 390.49 ms. Allocated memory is still 204.5 MB. Free memory was 182.0 MB in the beginning and 163.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6881.01 ms. Allocated memory was 204.5 MB in the beginning and 266.9 MB in the end (delta: 62.4 MB). Free memory was 162.3 MB in the beginning and 132.2 MB in the end (delta: 30.2 MB). Peak memory consumption was 92.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=5, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, x={2:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=-2147483648, temp=1, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2147483648, cnt=1, i=3, N=3, ret=-2147483648, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2147483648, ret=-2147483648, temp=1, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=-2147483648, ret2=-2147483648, temp=0, x={2:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=0, cnt=1, i=3, N=3, ret=0, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=0, ret=-2147483648, ret2=-2147483648, temp=0, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=0, temp=0, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-2147483648, ret2=-2147483648, ret5=0, temp=0, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 369 SDtfs, 265 SDslu, 647 SDs, 0 SdLazy, 702 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 869 GetRequests, 782 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 40 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 649 NumberOfCodeBlocks, 649 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 854 ConstructedInterpolants, 0 QuantifiedInterpolants, 99574 SizeOfPredicates, 22 NumberOfNonLiveVariables, 2061 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 972/1081 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...