/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_VARIABLES --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/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:36:20,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:36:20,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:36:20,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 17:36:20,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:36:20,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:36:20,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:36:20,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:36:20,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:36:20,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:36:20,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:36:20,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:36:20,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:36:20,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:36:20,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:36:20,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:36:20,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:36:20,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:36:20,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:36:20,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:36:20,814 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 17:36:20,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:36:20,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:36:20,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:36:20,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:36:20,841 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:36:20,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:36:20,842 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:36:20,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:36:20,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:36:20,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:36:20,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:36:20,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:36:20,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:36:20,845 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:36:20,845 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:36:20,845 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:36:20,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:36:20,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:36:20,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:36:20,846 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:36:20,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:36:20,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:20,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:36:20,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:36:20,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:36:20,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:36:20,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:20,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:36:20,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:36:20,848 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_VARIABLES 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 17:36:21,165 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:36:21,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:36:21,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:36:21,184 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:36:21,184 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:36:21,185 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 17:36:21,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d0714ec/d0ac91ce17df44fbb2b78999a1ad436a/FLAGe6f95dd93 [2020-07-20 17:36:21,683 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:36:21,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-20 17:36:21,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d0714ec/d0ac91ce17df44fbb2b78999a1ad436a/FLAGe6f95dd93 [2020-07-20 17:36:22,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51d0714ec/d0ac91ce17df44fbb2b78999a1ad436a [2020-07-20 17:36:22,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:36:22,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:36:22,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:22,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:36:22,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:36:22,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2a4c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22, skipping insertion in model container [2020-07-20 17:36:22,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:36:22,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:36:22,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:22,378 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:36:22,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:22,420 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:36:22,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22 WrapperNode [2020-07-20 17:36:22,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:22,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:36:22,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:36:22,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:36:22,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (1/1) ... [2020-07-20 17:36:22,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:36:22,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:36:22,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:36:22,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:36:22,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (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 17:36:22,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:36:22,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:36:22,618 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-20 17:36:22,619 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-20 17:36:22,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:36:22,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:36:22,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:36:22,619 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-20 17:36:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:36:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-20 17:36:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:36:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:36:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:36:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:36:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:36:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:36:22,942 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:36:22,943 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:36:22,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:22 BoogieIcfgContainer [2020-07-20 17:36:22,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:36:22,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:36:22,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:36:22,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:36:22,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:36:22" (1/3) ... [2020-07-20 17:36:22,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ff0966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:22, skipping insertion in model container [2020-07-20 17:36:22,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:22" (2/3) ... [2020-07-20 17:36:22,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ff0966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:22, skipping insertion in model container [2020-07-20 17:36:22,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:22" (3/3) ... [2020-07-20 17:36:22,960 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-20 17:36:22,973 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:36:22,983 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:36:22,999 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:36:23,027 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:36:23,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:36:23,027 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:36:23,028 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:36:23,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:36:23,028 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:36:23,028 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:36:23,028 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:36:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 17:36:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 17:36:23,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:23,074 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] [2020-07-20 17:36:23,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:23,087 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-20 17:36:23,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:23,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608381302] [2020-07-20 17:36:23,095 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 17:36:23,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:23,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 17:36:23,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:23,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608381302] [2020-07-20 17:36:23,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:23,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:36:23,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243088668] [2020-07-20 17:36:23,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:36:23,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:23,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:36:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:23,340 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-20 17:36:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:23,395 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-07-20 17:36:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:36:23,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 17:36:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:23,410 INFO L225 Difference]: With dead ends: 70 [2020-07-20 17:36:23,410 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 17:36:23,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 17:36:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-20 17:36:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 17:36:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-07-20 17:36:23,469 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 37 [2020-07-20 17:36:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:23,470 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-07-20 17:36:23,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:36:23,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-07-20 17:36:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 17:36:23,474 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:23,474 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] [2020-07-20 17:36:23,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:23,689 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:23,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1493850473, now seen corresponding path program 1 times [2020-07-20 17:36:23,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:23,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967119224] [2020-07-20 17:36:23,692 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 17:36:23,813 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:36:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 17:36:23,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:23,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967119224] [2020-07-20 17:36:23,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:23,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:36:23,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640002642] [2020-07-20 17:36:23,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:36:23,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:23,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:36:23,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:23,845 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 3 states. [2020-07-20 17:36:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:23,876 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2020-07-20 17:36:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:36:23,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 17:36:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:23,878 INFO L225 Difference]: With dead ends: 61 [2020-07-20 17:36:23,878 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:36:23,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:36:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 17:36:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 17:36:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 17:36:23,889 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-07-20 17:36:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:23,890 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 17:36:23,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:36:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 17:36:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 17:36:23,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:23,892 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 17:36:24,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:24,106 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1518301407, now seen corresponding path program 1 times [2020-07-20 17:36:24,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:24,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952190020] [2020-07-20 17:36:24,109 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 17:36:24,176 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:24,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 17:36:24,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-07-20 17:36:24,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:24,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952190020] [2020-07-20 17:36:24,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:24,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 17:36:24,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578462379] [2020-07-20 17:36:24,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:36:24,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:24,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:36:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:36:24,308 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-07-20 17:36:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:24,402 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2020-07-20 17:36:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:36:24,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-07-20 17:36:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:24,405 INFO L225 Difference]: With dead ends: 64 [2020-07-20 17:36:24,405 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 17:36:24,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:36:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 17:36:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2020-07-20 17:36:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 17:36:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2020-07-20 17:36:24,423 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2020-07-20 17:36:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:24,424 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2020-07-20 17:36:24,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:36:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2020-07-20 17:36:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 17:36:24,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:24,429 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-07-20 17:36:24,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:24,644 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 385931024, now seen corresponding path program 1 times [2020-07-20 17:36:24,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:24,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977883005] [2020-07-20 17:36:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:24,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:36:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 17:36:24,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 17:36:24,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977883005] [2020-07-20 17:36:24,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:24,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-07-20 17:36:24,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759776320] [2020-07-20 17:36:24,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:36:24,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:24,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:36:24,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:36:24,833 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 5 states. [2020-07-20 17:36:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:24,864 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2020-07-20 17:36:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:36:24,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-07-20 17:36:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:24,866 INFO L225 Difference]: With dead ends: 87 [2020-07-20 17:36:24,867 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 17:36:24,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 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 17:36:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 17:36:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-20 17:36:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 17:36:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-07-20 17:36:24,879 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 49 [2020-07-20 17:36:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:24,879 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-07-20 17:36:24,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:36:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-07-20 17:36:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 17:36:24,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:24,882 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 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] [2020-07-20 17:36:25,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:25,096 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1330907472, now seen corresponding path program 2 times [2020-07-20 17:36:25,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:25,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373683321] [2020-07-20 17:36:25,097 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 17:36:25,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:36:25,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 17:36:25,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:25,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373683321] [2020-07-20 17:36:25,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:25,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:36:25,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356962626] [2020-07-20 17:36:25,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:36:25,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:25,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:36:25,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:25,211 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 3 states. [2020-07-20 17:36:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:25,233 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-07-20 17:36:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:36:25,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-07-20 17:36:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:25,236 INFO L225 Difference]: With dead ends: 98 [2020-07-20 17:36:25,236 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 17:36:25,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 17:36:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-07-20 17:36:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 17:36:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-07-20 17:36:25,260 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 67 [2020-07-20 17:36:25,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:25,261 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-07-20 17:36:25,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:36:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-07-20 17:36:25,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 17:36:25,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:25,269 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 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] [2020-07-20 17:36:25,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:25,486 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1730394190, now seen corresponding path program 1 times [2020-07-20 17:36:25,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:25,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387840513] [2020-07-20 17:36:25,488 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 17:36:25,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:25,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 17:36:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 17:36:25,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387840513] [2020-07-20 17:36:25,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:25,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 17:36:25,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144007005] [2020-07-20 17:36:25,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:36:25,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:36:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:36:25,657 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 6 states. [2020-07-20 17:36:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:25,685 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2020-07-20 17:36:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:36:25,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-07-20 17:36:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:25,687 INFO L225 Difference]: With dead ends: 103 [2020-07-20 17:36:25,687 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 17:36:25,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:36:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 17:36:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 17:36:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 17:36:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-07-20 17:36:25,699 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 69 [2020-07-20 17:36:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:25,699 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-07-20 17:36:25,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:36:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-07-20 17:36:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 17:36:25,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:25,701 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 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] [2020-07-20 17:36:25,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:25,916 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1119119288, now seen corresponding path program 2 times [2020-07-20 17:36:25,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:25,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930325036] [2020-07-20 17:36:25,917 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 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 [2020-07-20 17:36:26,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:26,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:36:26,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 17:36:26,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-07-20 17:36:26,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930325036] [2020-07-20 17:36:26,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:26,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 17:36:26,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191115883] [2020-07-20 17:36:26,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:36:26,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:36:26,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:36:26,167 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 7 states. [2020-07-20 17:36:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:26,195 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2020-07-20 17:36:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:36:26,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-07-20 17:36:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:26,197 INFO L225 Difference]: With dead ends: 105 [2020-07-20 17:36:26,198 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 17:36:26,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:36:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 17:36:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-07-20 17:36:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 17:36:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-07-20 17:36:26,207 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 75 [2020-07-20 17:36:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:26,207 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-07-20 17:36:26,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:36:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-07-20 17:36:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-20 17:36:26,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:26,210 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 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] [2020-07-20 17:36:26,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:26,425 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash 896756038, now seen corresponding path program 3 times [2020-07-20 17:36:26,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:26,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266381455] [2020-07-20 17:36:26,427 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 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 [2020-07-20 17:36:26,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:26,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 17:36:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 80 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-07-20 17:36:26,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-20 17:36:26,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266381455] [2020-07-20 17:36:26,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:26,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 17:36:26,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197585216] [2020-07-20 17:36:26,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:36:26,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:26,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:36:26,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:36:26,611 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 7 states. [2020-07-20 17:36:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:26,647 INFO L93 Difference]: Finished difference Result 105 states and 142 transitions. [2020-07-20 17:36:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 17:36:26,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-07-20 17:36:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:26,649 INFO L225 Difference]: With dead ends: 105 [2020-07-20 17:36:26,649 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 17:36:26,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 17:36:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 17:36:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-07-20 17:36:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 17:36:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-07-20 17:36:26,659 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 77 [2020-07-20 17:36:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:26,659 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-07-20 17:36:26,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:36:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-07-20 17:36:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-20 17:36:26,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:26,661 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2020-07-20 17:36:26,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:26,877 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:26,878 INFO L82 PathProgramCache]: Analyzing trace with hash 516945678, now seen corresponding path program 1 times [2020-07-20 17:36:26,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:26,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196160667] [2020-07-20 17:36:26,880 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 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 [2020-07-20 17:36:27,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:27,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:36:27,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 17:36:27,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:27,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196160667] [2020-07-20 17:36:27,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:27,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:36:27,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054249154] [2020-07-20 17:36:27,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:36:27,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:27,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:36:27,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:27,384 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 3 states. [2020-07-20 17:36:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:27,398 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2020-07-20 17:36:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:36:27,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-07-20 17:36:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:27,400 INFO L225 Difference]: With dead ends: 97 [2020-07-20 17:36:27,400 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 17:36:27,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:36:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 17:36:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-07-20 17:36:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 17:36:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-07-20 17:36:27,412 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 92 [2020-07-20 17:36:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:27,413 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-07-20 17:36:27,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:36:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-07-20 17:36:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 17:36:27,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:27,414 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 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] [2020-07-20 17:36:27,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:27,625 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 1 times [2020-07-20 17:36:27,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:27,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27000146] [2020-07-20 17:36:27,627 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 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 [2020-07-20 17:36:27,954 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:27,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-20 17:36:27,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:36:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-07-20 17:36:28,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27000146] [2020-07-20 17:36:28,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:36:28,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 17:36:28,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719405738] [2020-07-20 17:36:28,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 17:36:28,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 17:36:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:36:28,020 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 6 states. [2020-07-20 17:36:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:28,060 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-07-20 17:36:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:36:28,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-20 17:36:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:28,065 INFO L225 Difference]: With dead ends: 107 [2020-07-20 17:36:28,065 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 17:36:28,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 17:36:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 17:36:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-07-20 17:36:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 17:36:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-07-20 17:36:28,077 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 94 [2020-07-20 17:36:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:28,077 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-07-20 17:36:28,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 17:36:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-07-20 17:36:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 17:36:28,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:28,079 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 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] [2020-07-20 17:36:28,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:28,293 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:28,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 2 times [2020-07-20 17:36:28,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:28,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014290500] [2020-07-20 17:36:28,295 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 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 [2020-07-20 17:36:28,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:28,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:36:28,822 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:36:29,158 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:29,220 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:36:29,221 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:36:29,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:29,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:36:29 BoogieIcfgContainer [2020-07-20 17:36:29,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:36:29,506 INFO L168 Benchmark]: Toolchain (without parser) took 7373.80 ms. Allocated memory was 139.5 MB in the beginning and 245.4 MB in the end (delta: 105.9 MB). Free memory was 104.2 MB in the beginning and 129.8 MB in the end (delta: -25.6 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:29,507 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:36:29,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.90 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 93.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:29,508 INFO L168 Benchmark]: Boogie Preprocessor took 123.64 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 180.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:29,509 INFO L168 Benchmark]: RCFGBuilder took 403.00 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 162.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:29,510 INFO L168 Benchmark]: TraceAbstraction took 6552.10 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 161.7 MB in the beginning and 129.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:29,514 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.90 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 93.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.64 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 180.2 MB in the end (delta: -87.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 403.00 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 162.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6552.10 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 161.7 MB in the beginning and 129.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; VAL [x={2:0}] [L32] CALL init_nondet(x) VAL [x={2:0}] [L5] int i; [L6] i = 0 VAL [i=0, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=1, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=2, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=3, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=4, x={2:0}, x={2:0}] [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ VAL [i=5, x={2:0}, x={2:0}] [L6] COND FALSE !(i < 5) VAL [i=5, x={2:0}, x={2:0}] [L32] RET init_nondet(x) VAL [x={2:0}] [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; VAL [x={2:0}] [L38] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483642, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=-6, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=-6, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=-6, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=-3, cnt=2, i=5, ret=-6, x={2:0}, x={2:0}] [L38] RET, EXPR rangesum(x) VAL [rangesum(x)=-3, x={2:0}] [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp VAL [ret=-3, temp=1, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483642, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=-6, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=-6, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=-6, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=-3, cnt=2, i=5, ret=-6, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=-3, ret=-3, temp=1, x={2:0}] [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=-3, ret2=-3, temp=2, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=1, ret=-3, ret2=-3, temp=2, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=2, ret=-3, ret2=-3, temp=2, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=3, ret=-3, ret2=-3, temp=2, x={2:0}] [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ VAL [i=4, ret=-3, ret2=-3, temp=2, x={2:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=-3, ret2=-3, temp=2, x={2:0}] [L46] x[5 -1] = temp VAL [i=4, ret=-3, ret2=-3, temp=2, x={2:0}] [L47] CALL, EXPR rangesum(x) VAL [x={2:0}] [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L18] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=1, i=3, ret=-2147483648, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=-2147483648, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=-2147483648, x={2:0}, x={2:0}] [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 VAL [cnt=2, i=4, ret=-2147483646, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=-2147483646, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=-2147483646, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=-1073741823, cnt=2, i=5, ret=-2147483646, x={2:0}, x={2:0}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=-1073741823, ret=-3, ret2=-3, temp=2, x={2:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=-3, ret2=-3, ret5=-1073741823, temp=2, x={2:0}] [L50] __VERIFIER_error() VAL [i=4, ret=-3, ret2=-3, ret5=-1073741823, temp=2, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 11, TraceHistogramMax: 15, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 60 SDslu, 588 SDs, 0 SdLazy, 139 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 997 GetRequests, 956 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=10, 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, 10 MinimizatonAttempts, 23 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 743 NumberOfCodeBlocks, 608 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 992 ConstructedInterpolants, 0 QuantifiedInterpolants, 82648 SizeOfPredicates, 11 NumberOfNonLiveVariables, 1770 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 2551/2699 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...