/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 DAGSIZE --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 20:18:01,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:01,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:01,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:01,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:01,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:01,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:01,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:01,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:01,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:01,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:01,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:01,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:01,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:01,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:01,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:01,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:01,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:01,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:01,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:01,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:01,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:01,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:01,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:01,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:18:01,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:01,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:01,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:01,190 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 20:18:01,214 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:01,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:01,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:01,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:01,216 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:01,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:01,217 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:01,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:01,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:01,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:01,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:01,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:01,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:01,220 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:01,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:01,220 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:01,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:01,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:01,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:01,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:01,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:01,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:01,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:01,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:01,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:01,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:01,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:01,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:01,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:01,223 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 -> DAGSIZE 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 20:18:01,525 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:01,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:01,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:01,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:01,547 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:01,548 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 20:18:01,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5846bc9/d7e4afffaf4041e1a865938400053b9f/FLAGbefe80a3d [2020-07-21 20:18:02,087 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:02,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-07-21 20:18:02,095 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5846bc9/d7e4afffaf4041e1a865938400053b9f/FLAGbefe80a3d [2020-07-21 20:18:02,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e5846bc9/d7e4afffaf4041e1a865938400053b9f [2020-07-21 20:18:02,441 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:02,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:02,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:02,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:02,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:02,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b247487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02, skipping insertion in model container [2020-07-21 20:18:02,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:02,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:02,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:02,679 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:02,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:02,718 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:02,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02 WrapperNode [2020-07-21 20:18:02,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:02,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:02,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:02,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:02,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (1/1) ... [2020-07-21 20:18:02,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:02,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:02,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:02,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:02,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (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 20:18:02,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:02,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:02,925 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-21 20:18:02,925 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-21 20:18:02,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-21 20:18:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-21 20:18:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:02,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:02,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:18:02,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:02,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:02,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:03,349 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:03,349 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 20:18:03,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:03 BoogieIcfgContainer [2020-07-21 20:18:03,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:03,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:03,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:03,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:03,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:02" (1/3) ... [2020-07-21 20:18:03,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbea1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:03, skipping insertion in model container [2020-07-21 20:18:03,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:02" (2/3) ... [2020-07-21 20:18:03,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bbea1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:03, skipping insertion in model container [2020-07-21 20:18:03,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:03" (3/3) ... [2020-07-21 20:18:03,360 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-07-21 20:18:03,368 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:03,375 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:03,387 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:03,412 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:03,412 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:03,412 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:03,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:03,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:03,413 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:03,413 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:03,413 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-21 20:18:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 20:18:03,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:03,442 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 20:18:03,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2020-07-21 20:18:03,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:03,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291442262] [2020-07-21 20:18:03,457 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 20:18:03,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:03,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:03,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 20:18:03,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:03,646 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 20:18:03,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:03,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291442262] [2020-07-21 20:18:03,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:03,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:03,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20587072] [2020-07-21 20:18:03,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:03,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:03,674 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-21 20:18:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:03,720 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2020-07-21 20:18:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:03,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-21 20:18:03,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:03,732 INFO L225 Difference]: With dead ends: 66 [2020-07-21 20:18:03,733 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 20:18:03,737 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 20:18:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 20:18:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-21 20:18:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 20:18:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-21 20:18:03,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2020-07-21 20:18:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:03,787 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-21 20:18:03,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-21 20:18:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 20:18:03,790 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:03,791 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 20:18:03,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:03,993 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:03,995 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2020-07-21 20:18:03,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:03,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559083177] [2020-07-21 20:18:03,996 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 20:18:04,091 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:04,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:04,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:04,123 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 20:18:04,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:04,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559083177] [2020-07-21 20:18:04,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:04,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:04,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258730857] [2020-07-21 20:18:04,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:04,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:04,129 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-21 20:18:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:04,160 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-07-21 20:18:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:04,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-21 20:18:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:04,170 INFO L225 Difference]: With dead ends: 57 [2020-07-21 20:18:04,170 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:18:04,172 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 20:18:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:18:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-21 20:18:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 20:18:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-21 20:18:04,194 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2020-07-21 20:18:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:04,195 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-21 20:18:04,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-21 20:18:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 20:18:04,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,198 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 20:18:04,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:04,415 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2020-07-21 20:18:04,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:04,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848555849] [2020-07-21 20:18:04,418 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 20:18:04,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 20:18:04,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:04,511 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 20:18:04,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:04,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848555849] [2020-07-21 20:18:04,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:04,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:04,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280041647] [2020-07-21 20:18:04,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:04,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:04,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:04,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:04,516 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 3 states. [2020-07-21 20:18:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:04,539 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-07-21 20:18:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:04,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-21 20:18:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:04,541 INFO L225 Difference]: With dead ends: 56 [2020-07-21 20:18:04,541 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:18:04,542 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 20:18:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:18:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-21 20:18:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 20:18:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-21 20:18:04,550 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 39 [2020-07-21 20:18:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:04,551 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-21 20:18:04,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-21 20:18:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 20:18:04,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,553 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 20:18:04,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:04,767 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:04,768 INFO L82 PathProgramCache]: Analyzing trace with hash -889043021, now seen corresponding path program 1 times [2020-07-21 20:18:04,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:04,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044592273] [2020-07-21 20:18:04,769 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 20:18:04,871 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:04,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:04,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 20:18:04,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:04,898 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 20:18:04,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:04,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044592273] [2020-07-21 20:18:04,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:04,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:04,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853930943] [2020-07-21 20:18:04,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:04,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:04,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:04,901 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 3 states. [2020-07-21 20:18:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:04,927 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-07-21 20:18:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:04,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-21 20:18:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:04,929 INFO L225 Difference]: With dead ends: 64 [2020-07-21 20:18:04,929 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 20:18:04,930 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 20:18:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 20:18:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-21 20:18:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 20:18:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-21 20:18:04,938 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 41 [2020-07-21 20:18:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:04,938 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-21 20:18:04,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-21 20:18:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 20:18:04,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,940 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 20:18:05,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,155 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2020-07-21 20:18:05,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90457458] [2020-07-21 20:18:05,158 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 20:18:05,223 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,255 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 20:18:05,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:05,323 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 20:18:05,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90457458] [2020-07-21 20:18:05,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:05,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 20:18:05,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828142206] [2020-07-21 20:18:05,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:18:05,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:18:05,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:18:05,326 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2020-07-21 20:18:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,363 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-07-21 20:18:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:18:05,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-07-21 20:18:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,365 INFO L225 Difference]: With dead ends: 75 [2020-07-21 20:18:05,365 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 20:18:05,366 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 20:18:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 20:18:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-21 20:18:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 20:18:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-21 20:18:05,374 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 50 [2020-07-21 20:18:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,374 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-21 20:18:05,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:18:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-21 20:18:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 20:18:05,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,376 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 20:18:05,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,580 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,580 INFO L82 PathProgramCache]: Analyzing trace with hash -463307829, now seen corresponding path program 2 times [2020-07-21 20:18:05,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568944776] [2020-07-21 20:18:05,581 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 20:18:05,652 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,716 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 20:18:05,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:05,781 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 20:18:05,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568944776] [2020-07-21 20:18:05,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:05,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 20:18:05,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179313956] [2020-07-21 20:18:05,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:18:05,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:18:05,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:18:05,784 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 7 states. [2020-07-21 20:18:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,816 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-07-21 20:18:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:18:05,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-21 20:18:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,818 INFO L225 Difference]: With dead ends: 77 [2020-07-21 20:18:05,818 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 20:18:05,819 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 20:18:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 20:18:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-21 20:18:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 20:18:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-21 20:18:05,827 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 56 [2020-07-21 20:18:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,828 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-21 20:18:05,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:18:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-21 20:18:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 20:18:05,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,830 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 20:18:06,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,044 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:06,045 INFO L82 PathProgramCache]: Analyzing trace with hash 466239373, now seen corresponding path program 3 times [2020-07-21 20:18:06,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:06,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389871578] [2020-07-21 20:18:06,046 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 20:18:06,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:06,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:06,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:06,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:06,162 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 20:18:06,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:06,210 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 20:18:06,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389871578] [2020-07-21 20:18:06,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:06,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 20:18:06,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727346729] [2020-07-21 20:18:06,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:18:06,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:06,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:18:06,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:18:06,213 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-07-21 20:18:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:06,267 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-21 20:18:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:18:06,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-07-21 20:18:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:06,269 INFO L225 Difference]: With dead ends: 80 [2020-07-21 20:18:06,269 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 20:18:06,270 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 20:18:06,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 20:18:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-07-21 20:18:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 20:18:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-07-21 20:18:06,278 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 58 [2020-07-21 20:18:06,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:06,278 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-07-21 20:18:06,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:18:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-07-21 20:18:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 20:18:06,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:06,280 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 20:18:06,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,496 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:06,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1145938068, now seen corresponding path program 1 times [2020-07-21 20:18:06,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:06,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495619885] [2020-07-21 20:18:06,499 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 20:18:06,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:06,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 20:18:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:06,621 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 20:18:06,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:06,678 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 20:18:06,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495619885] [2020-07-21 20:18:06,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:06,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-21 20:18:06,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146500203] [2020-07-21 20:18:06,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:18:06,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:18:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:18:06,682 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 5 states. [2020-07-21 20:18:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:06,711 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-07-21 20:18:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:18:06,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-07-21 20:18:06,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:06,713 INFO L225 Difference]: With dead ends: 81 [2020-07-21 20:18:06,713 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 20:18:06,714 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 20:18:06,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 20:18:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-21 20:18:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 20:18:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-07-21 20:18:06,721 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 85 [2020-07-21 20:18:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:06,722 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-07-21 20:18:06,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:18:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-07-21 20:18:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 20:18:06,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:06,727 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 20:18:06,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,941 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:06,942 INFO L82 PathProgramCache]: Analyzing trace with hash -855759126, now seen corresponding path program 2 times [2020-07-21 20:18:06,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:06,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101692049] [2020-07-21 20:18:06,944 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 20:18:07,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:07,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:18:07,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:07,119 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 20:18:07,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:07,188 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 20:18:07,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101692049] [2020-07-21 20:18:07,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:07,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 20:18:07,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777833523] [2020-07-21 20:18:07,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:18:07,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:18:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:18:07,191 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 7 states. [2020-07-21 20:18:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:07,229 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-07-21 20:18:07,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:18:07,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-07-21 20:18:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:07,231 INFO L225 Difference]: With dead ends: 84 [2020-07-21 20:18:07,231 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 20:18:07,232 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 20:18:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 20:18:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-21 20:18:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 20:18:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-07-21 20:18:07,238 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 85 [2020-07-21 20:18:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:07,239 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-07-21 20:18:07,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:18:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-07-21 20:18:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 20:18:07,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:07,241 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 20:18:07,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:07,455 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1478048176, now seen corresponding path program 3 times [2020-07-21 20:18:07,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:07,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785512953] [2020-07-21 20:18:07,458 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 20:18:07,600 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:07,628 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 20:18:07,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:07,665 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 20:18:07,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785512953] [2020-07-21 20:18:07,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:07,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 20:18:07,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616333923] [2020-07-21 20:18:07,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:18:07,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:07,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:18:07,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:18:07,668 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 6 states. [2020-07-21 20:18:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:07,701 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-07-21 20:18:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:18:07,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-07-21 20:18:07,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:07,703 INFO L225 Difference]: With dead ends: 87 [2020-07-21 20:18:07,703 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 20:18:07,703 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 20:18:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 20:18:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 20:18:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 20:18:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-07-21 20:18:07,714 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 94 [2020-07-21 20:18:07,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:07,714 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-07-21 20:18:07,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:18:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-07-21 20:18:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-21 20:18:07,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:07,716 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 20:18:07,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:07,921 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:07,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:07,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1352614250, now seen corresponding path program 4 times [2020-07-21 20:18:07,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:07,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835463891] [2020-07-21 20:18:07,923 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 20:18:08,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:08,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:08,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:08,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:08,579 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:08,579 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:08,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:08,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:08 BoogieIcfgContainer [2020-07-21 20:18:08,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:08,880 INFO L168 Benchmark]: Toolchain (without parser) took 6437.40 ms. Allocated memory was 145.8 MB in the beginning and 245.9 MB in the end (delta: 100.1 MB). Free memory was 101.6 MB in the beginning and 145.1 MB in the end (delta: -43.5 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:08,881 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 145.8 MB. Free memory is still 120.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:08,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.60 ms. Allocated memory is still 145.8 MB. Free memory was 101.2 MB in the beginning and 90.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:08,883 INFO L168 Benchmark]: Boogie Preprocessor took 142.25 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 90.9 MB in the beginning and 181.4 MB in the end (delta: -90.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:08,884 INFO L168 Benchmark]: RCFGBuilder took 491.57 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:08,884 INFO L168 Benchmark]: TraceAbstraction took 5523.02 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 162.7 MB in the beginning and 145.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:08,888 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 145.8 MB. Free memory is still 120.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.60 ms. Allocated memory is still 145.8 MB. Free memory was 101.2 MB in the beginning and 90.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.25 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 90.9 MB in the beginning and 181.4 MB in the end (delta: -90.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.57 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5523.02 ms. Allocated memory was 203.9 MB in the beginning and 245.9 MB in the end (delta: 41.9 MB). Free memory was 162.7 MB in the beginning and 145.1 MB in the end (delta: 17.6 MB). Peak memory consumption was 59.6 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=2147483647, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2147483647, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483647, 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}] [L38] RET, EXPR rangesum(x) VAL [rangesum(x)=2, 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=2, temp=-2147483648, 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=2147483647, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=1, i=4, ret=2147483647, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483647, 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}] [L41] RET, EXPR rangesum(x) VAL [rangesum(x)=2, ret=2, temp=-2147483648, x={2:0}] [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; VAL [i=0, ret=2, ret2=2, temp=2147483643, 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=2, ret2=2, temp=2147483643, 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=2, ret2=2, temp=2147483643, 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=2, ret2=2, temp=2147483643, 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=2, ret2=2, temp=2147483643, x={2:0}] [L43] COND FALSE !(i<5 -1) VAL [i=4, ret=2, ret2=2, temp=2147483643, x={2:0}] [L46] x[5 -1] = temp VAL [i=4, ret=2, ret2=2, temp=2147483643, 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=-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=1, x={2:0}, x={2:0}] [L17] i++ VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L23] COND TRUE cnt !=0 [L24] return ret / cnt; VAL [\result=0, cnt=2, i=5, ret=1, x={2:0}, x={2:0}] [L47] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=0, ret=2, ret2=2, temp=2147483643, x={2:0}] [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=2, ret2=2, ret5=0, temp=2147483643, x={2:0}] [L50] __VERIFIER_error() VAL [i=4, ret=2, ret2=2, ret5=0, temp=2147483643, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, 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, 1.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 684 NumberOfCodeBlocks, 605 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 996 ConstructedInterpolants, 0 QuantifiedInterpolants, 80688 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1762 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...