/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:59:26,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:59:26,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:59:26,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:59:26,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:59:26,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:59:26,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:59:26,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:59:26,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:59:26,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:59:26,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:59:26,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:59:26,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:59:26,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:59:26,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:59:26,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:59:26,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:59:26,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:59:26,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:59:26,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:59:26,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:59:26,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:59:26,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:59:26,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:59:26,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:59:26,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:59:26,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:59:26,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:59:26,880 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 13:59:26,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:59:26,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:59:26,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:59:26,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:59:26,908 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:59:26,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:59:26,908 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:59:26,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:59:26,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:59:26,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:59:26,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:59:26,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:59:26,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:59:26,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:59:26,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:59:26,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:59:26,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:59:26,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:59:26,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:59:26,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:59:26,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:59:26,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:59:26,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:59:26,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:59:26,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:59:26,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:59:26,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:26,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:59:26,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:59:26,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:59:27,241 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:59:27,266 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:59:27,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:59:27,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:59:27,271 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:59:27,272 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 13:59:27,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb7f8ea55/e8ca6c79c77a49cbb8df0c275410c66c/FLAG33bf7c950 [2020-07-21 13:59:27,820 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:59:27,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 13:59:27,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb7f8ea55/e8ca6c79c77a49cbb8df0c275410c66c/FLAG33bf7c950 [2020-07-21 13:59:28,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb7f8ea55/e8ca6c79c77a49cbb8df0c275410c66c [2020-07-21 13:59:28,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:59:28,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:59:28,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:59:28,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:59:28,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:59:28,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4006dedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28, skipping insertion in model container [2020-07-21 13:59:28,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:59:28,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:59:28,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:59:28,424 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:59:28,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:59:28,562 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:59:28,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28 WrapperNode [2020-07-21 13:59:28,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:59:28,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:59:28,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:59:28,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:59:28,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (1/1) ... [2020-07-21 13:59:28,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:59:28,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:59:28,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:59:28,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:59:28,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (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 13:59:28,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:59:28,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:59:28,684 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 13:59:28,684 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 13:59:28,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:59:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:59:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:59:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 13:59:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:59:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 13:59:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:59:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:59:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 13:59:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:59:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:59:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:59:29,087 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:59:29,087 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 13:59:29,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:59:29 BoogieIcfgContainer [2020-07-21 13:59:29,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:59:29,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:59:29,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:59:29,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:59:29,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:59:28" (1/3) ... [2020-07-21 13:59:29,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0727d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:59:29, skipping insertion in model container [2020-07-21 13:59:29,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:59:28" (2/3) ... [2020-07-21 13:59:29,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0727d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:59:29, skipping insertion in model container [2020-07-21 13:59:29,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:59:29" (3/3) ... [2020-07-21 13:59:29,100 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-21 13:59:29,111 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:59:29,117 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:59:29,129 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:59:29,152 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:59:29,153 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:59:29,153 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:59:29,153 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:59:29,153 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:59:29,154 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:59:29,154 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:59:29,154 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:59:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-21 13:59:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 13:59:29,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:29,183 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] [2020-07-21 13:59:29,183 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:29,190 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-21 13:59:29,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:29,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006297003] [2020-07-21 13:59:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:29,339 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:29,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:29,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:59:29,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:29,411 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 13:59:29,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:29,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006297003] [2020-07-21 13:59:29,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:29,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:59:29,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524597655] [2020-07-21 13:59:29,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:59:29,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:29,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:59:29,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:29,443 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-21 13:59:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:29,498 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-07-21 13:59:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:59:29,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-21 13:59:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:29,513 INFO L225 Difference]: With dead ends: 66 [2020-07-21 13:59:29,514 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 13:59:29,520 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 [2020-07-21 13:59:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 13:59:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-21 13:59:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 13:59:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-21 13:59:29,598 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2020-07-21 13:59:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:29,599 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-21 13:59:29,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:59:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-21 13:59:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:59:29,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:29,605 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] [2020-07-21 13:59:29,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:29,818 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2020-07-21 13:59:29,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:29,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436049403] [2020-07-21 13:59:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:29,940 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 13:59:29,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:29,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436049403] [2020-07-21 13:59:29,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:29,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:59:29,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425390188] [2020-07-21 13:59:29,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:59:29,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:29,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:59:29,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:29,960 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-21 13:59:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:29,978 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-07-21 13:59:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:59:29,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-21 13:59:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:29,981 INFO L225 Difference]: With dead ends: 57 [2020-07-21 13:59:29,982 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 13:59:29,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 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 13:59:29,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 13:59:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-21 13:59:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 13:59:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-21 13:59:29,993 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2020-07-21 13:59:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:29,994 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-21 13:59:29,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:59:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-21 13:59:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:59:29,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:29,996 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] [2020-07-21 13:59:30,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:30,210 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2020-07-21 13:59:30,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:30,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772463443] [2020-07-21 13:59:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:30,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:30,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:30,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:59:30,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 13:59:30,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:30,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772463443] [2020-07-21 13:59:30,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:30,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:59:30,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824284641] [2020-07-21 13:59:30,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:59:30,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:59:30,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:30,318 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 3 states. [2020-07-21 13:59:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:30,344 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-07-21 13:59:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:59:30,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-21 13:59:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:30,348 INFO L225 Difference]: With dead ends: 56 [2020-07-21 13:59:30,348 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 13:59:30,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 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 13:59:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 13:59:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-21 13:59:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 13:59:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-21 13:59:30,369 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 39 [2020-07-21 13:59:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:30,369 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-21 13:59:30,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:59:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-21 13:59:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 13:59:30,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:30,373 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, 1] [2020-07-21 13:59:30,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:30,588 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash -889043021, now seen corresponding path program 1 times [2020-07-21 13:59:30,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:30,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541673030] [2020-07-21 13:59:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:30,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:30,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:30,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 13:59:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 13:59:30,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:59:30,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541673030] [2020-07-21 13:59:30,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:59:30,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:59:30,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297587166] [2020-07-21 13:59:30,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:59:30,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:59:30,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:59:30,719 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 3 states. [2020-07-21 13:59:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:30,754 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-07-21 13:59:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:59:30,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-21 13:59:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:30,758 INFO L225 Difference]: With dead ends: 64 [2020-07-21 13:59:30,759 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 13:59:30,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 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 13:59:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 13:59:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-21 13:59:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 13:59:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-21 13:59:30,767 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 41 [2020-07-21 13:59:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:30,767 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-21 13:59:30,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:59:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-21 13:59:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 13:59:30,769 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:30,770 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, 1, 1, 1, 1] [2020-07-21 13:59:30,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:30,981 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2020-07-21 13:59:30,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:30,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469531135] [2020-07-21 13:59:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:31,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:31,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:31,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 13:59:31,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:59:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 13:59:31,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469531135] [2020-07-21 13:59:31,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:59:31,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 13:59:31,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531788707] [2020-07-21 13:59:31,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:59:31,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:59:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:59:31,152 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-07-21 13:59:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:31,194 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-07-21 13:59:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:59:31,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-07-21 13:59:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:31,197 INFO L225 Difference]: With dead ends: 75 [2020-07-21 13:59:31,197 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 13:59:31,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:59:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 13:59:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-21 13:59:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 13:59:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-21 13:59:31,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 50 [2020-07-21 13:59:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:31,207 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-21 13:59:31,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:59:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-21 13:59:31,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 13:59:31,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:31,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-07-21 13:59:31,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:31,423 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash -463307829, now seen corresponding path program 2 times [2020-07-21 13:59:31,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:31,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348254554] [2020-07-21 13:59:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:31,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:31,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:31,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:59:31,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 13:59:31,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:59:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 13:59:31,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348254554] [2020-07-21 13:59:31,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:59:31,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 13:59:31,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539931001] [2020-07-21 13:59:31,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:59:31,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:59:31,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:59:31,615 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-07-21 13:59:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:31,648 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-07-21 13:59:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:59:31,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-21 13:59:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:31,649 INFO L225 Difference]: With dead ends: 77 [2020-07-21 13:59:31,650 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:59:31,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:59:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:59:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 13:59:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 13:59:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-21 13:59:31,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 56 [2020-07-21 13:59:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:31,658 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-21 13:59:31,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:59:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-21 13:59:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 13:59:31,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:31,659 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-07-21 13:59:31,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:31,873 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash 466239373, now seen corresponding path program 3 times [2020-07-21 13:59:31,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:31,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757841969] [2020-07-21 13:59:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:31,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:31,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:31,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:31,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 13:59:31,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:59:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 13:59:32,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757841969] [2020-07-21 13:59:32,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:59:32,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 13:59:32,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134455632] [2020-07-21 13:59:32,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:59:32,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:32,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:59:32,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:59:32,048 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-07-21 13:59:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:32,091 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-21 13:59:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:59:32,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-07-21 13:59:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:32,094 INFO L225 Difference]: With dead ends: 80 [2020-07-21 13:59:32,094 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 13:59:32,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:59:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 13:59:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-21 13:59:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 13:59:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-21 13:59:32,103 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 58 [2020-07-21 13:59:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:32,104 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-21 13:59:32,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:59:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-21 13:59:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 13:59:32,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:32,106 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 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] [2020-07-21 13:59:32,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:32,321 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1145938068, now seen corresponding path program 1 times [2020-07-21 13:59:32,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:32,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559216570] [2020-07-21 13:59:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:32,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:32,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:59:32,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 85 proven. 7 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-07-21 13:59:32,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:59:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 13 proven. 127 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 13:59:32,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559216570] [2020-07-21 13:59:32,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:59:32,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-21 13:59:32,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559092643] [2020-07-21 13:59:32,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:59:32,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:32,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:59:32,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:59:32,471 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 5 states. [2020-07-21 13:59:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:32,494 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-07-21 13:59:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:59:32,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-07-21 13:59:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:32,496 INFO L225 Difference]: With dead ends: 81 [2020-07-21 13:59:32,496 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 13:59:32,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:59:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 13:59:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-21 13:59:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 13:59:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-07-21 13:59:32,503 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 85 [2020-07-21 13:59:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:32,503 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-07-21 13:59:32,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:59:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-07-21 13:59:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 13:59:32,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:32,505 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 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] [2020-07-21 13:59:32,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:32,720 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash -855759126, now seen corresponding path program 2 times [2020-07-21 13:59:32,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:32,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326166190] [2020-07-21 13:59:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:32,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:59:32,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:59:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-07-21 13:59:32,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:59:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-07-21 13:59:32,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326166190] [2020-07-21 13:59:32,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:59:32,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 13:59:32,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971423362] [2020-07-21 13:59:32,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 13:59:32,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:32,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 13:59:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:59:32,900 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2020-07-21 13:59:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:32,939 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-07-21 13:59:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:59:32,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-07-21 13:59:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:32,941 INFO L225 Difference]: With dead ends: 84 [2020-07-21 13:59:32,941 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 13:59:32,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 13:59:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 13:59:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-21 13:59:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 13:59:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-21 13:59:32,948 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 85 [2020-07-21 13:59:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:32,948 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-21 13:59:32,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 13:59:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-21 13:59:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 13:59:32,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:32,950 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] [2020-07-21 13:59:33,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:33,164 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 3 times [2020-07-21 13:59:33,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:33,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729707246] [2020-07-21 13:59:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:33,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:33,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:59:33,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:59:33,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:59:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-21 13:59:33,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:59:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-07-21 13:59:33,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729707246] [2020-07-21 13:59:33,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:59:33,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 13:59:33,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181899653] [2020-07-21 13:59:33,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 13:59:33,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:59:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 13:59:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:59:33,560 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 6 states. [2020-07-21 13:59:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:59:33,592 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-07-21 13:59:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:59:33,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-21 13:59:33,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:59:33,594 INFO L225 Difference]: With dead ends: 87 [2020-07-21 13:59:33,594 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 13:59:33,595 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 [2020-07-21 13:59:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 13:59:33,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 13:59:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 13:59:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 13:59:33,603 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 94 [2020-07-21 13:59:33,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:59:33,604 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 13:59:33,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 13:59:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 13:59:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-21 13:59:33,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:59:33,605 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] [2020-07-21 13:59:33,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:33,817 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:59:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:59:33,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 4 times [2020-07-21 13:59:33,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:59:33,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932017222] [2020-07-21 13:59:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:59:34,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:59:34,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:59:34,342 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:59:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:59:34,463 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:59:34,525 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:59:34,526 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:59:34,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:59:34,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:59:34 BoogieIcfgContainer [2020-07-21 13:59:34,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:59:34,823 INFO L168 Benchmark]: Toolchain (without parser) took 6647.19 ms. Allocated memory was 136.3 MB in the beginning and 251.1 MB in the end (delta: 114.8 MB). Free memory was 101.1 MB in the beginning and 170.0 MB in the end (delta: -68.9 MB). Peak memory consumption was 45.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:34,824 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 136.3 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 13:59:34,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.03 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 100.7 MB in the beginning and 180.9 MB in the end (delta: -80.2 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:34,826 INFO L168 Benchmark]: Boogie Preprocessor took 61.49 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:34,826 INFO L168 Benchmark]: RCFGBuilder took 466.70 ms. Allocated memory is still 201.9 MB. Free memory was 178.0 MB in the beginning and 160.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:34,827 INFO L168 Benchmark]: TraceAbstraction took 5727.42 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 159.5 MB in the beginning and 170.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. [2020-07-21 13:59:34,831 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 136.3 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 381.03 ms. Allocated memory was 136.3 MB in the beginning and 201.9 MB in the end (delta: 65.5 MB). Free memory was 100.7 MB in the beginning and 180.9 MB in the end (delta: -80.2 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.49 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 466.70 ms. Allocated memory is still 201.9 MB. Free memory was 178.0 MB in the beginning and 160.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5727.42 ms. Allocated memory was 201.9 MB in the beginning and 251.1 MB in the end (delta: 49.3 MB). Free memory was 159.5 MB in the beginning and 170.0 MB in the end (delta: -10.5 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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=5, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=5, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=5, 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=7, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=3, cnt=2, i=5, ret=7, 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=2, 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=5, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=5, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=5, 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=7, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=3, cnt=2, i=5, ret=7, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=3, ret=3, temp=2, 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=3, 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=3, 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=3, 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=3, 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=3, x={2:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=3, ret2=3, temp=3, x={2:0}] [L46] x[5 -1] = temp VAL [i=4, ret=3, ret2=3, temp=3, 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=2, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2, 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=5, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=2, cnt=2, i=5, ret=5, x={2:0}, x={2:0}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=2, ret=3, ret2=3, temp=3, x={2:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=3, ret2=3, ret5=2, temp=3, x={2:0}] [L50] __VERIFIER_error() VAL [i=4, ret=3, ret2=3, ret5=2, temp=3, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 11, TraceHistogramMax: 15, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 360 SDtfs, 53 SDslu, 469 SDs, 0 SdLazy, 107 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1002 GetRequests, 961 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 684 NumberOfCodeBlocks, 510 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 996 ConstructedInterpolants, 0 QuantifiedInterpolants, 80688 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1591 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 1900/2254 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...