/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:16:53,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:16:53,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:16:53,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:16:53,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:16:53,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:16:53,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:16:53,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:16:53,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:16:53,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:16:53,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:16:53,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:16:53,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:16:53,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:16:53,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:16:53,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:16:53,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:16:53,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:16:53,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:16:53,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:16:53,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:16:53,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:16:53,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:16:53,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:16:53,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:16:53,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:16:53,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:16:53,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:16:53,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:16:53,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:16:53,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:16:53,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:16:53,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:16:53,145 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:16:53,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:16:53,146 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:16:53,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:16:53,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:16:53,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:16:53,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:16:53,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:16:53,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:16:53,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:16:53,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:16:53,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:16:53,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:16:53,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:16:53,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:16:53,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:16:53,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:16:53,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:16:53,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:16:53,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:16:53,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:16:53,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:16:53,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:53,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:16:53,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:16:53,153 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 -> 4 [2020-07-20 22:16:53,540 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:16:53,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:16:53,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:16:53,577 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:16:53,578 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:16:53,578 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-07-20 22:16:53,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a1792d16/ce7dc626c91b43e8b04903359f037cc3/FLAGabfffdaae [2020-07-20 22:16:54,231 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:16:54,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2020-07-20 22:16:54,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a1792d16/ce7dc626c91b43e8b04903359f037cc3/FLAGabfffdaae [2020-07-20 22:16:54,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a1792d16/ce7dc626c91b43e8b04903359f037cc3 [2020-07-20 22:16:54,599 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:16:54,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:16:54,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:54,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:16:54,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:16:54,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143da84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54, skipping insertion in model container [2020-07-20 22:16:54,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:16:54,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:16:54,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:54,910 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:16:54,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:54,945 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:16:54,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54 WrapperNode [2020-07-20 22:16:54,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:54,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:16:54,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:16:54,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:16:54,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... [2020-07-20 22:16:54,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:16:54,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:16:54,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:16:54,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:16:54,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:16:55,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:16:55,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:16:55,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:16:55,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:16:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:16:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:16:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:16:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:16:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:16:55,414 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:16:55,415 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:16:55,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:55 BoogieIcfgContainer [2020-07-20 22:16:55,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:16:55,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:16:55,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:16:55,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:16:55,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:16:54" (1/3) ... [2020-07-20 22:16:55,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa86742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:55, skipping insertion in model container [2020-07-20 22:16:55,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:54" (2/3) ... [2020-07-20 22:16:55,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa86742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:55, skipping insertion in model container [2020-07-20 22:16:55,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:55" (3/3) ... [2020-07-20 22:16:55,432 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-07-20 22:16:55,444 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:16:55,455 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:16:55,471 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:16:55,508 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:16:55,509 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:16:55,509 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:16:55,509 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:16:55,509 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:16:55,510 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:16:55,510 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:16:55,510 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:16:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-20 22:16:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:16:55,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:55,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:55,539 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:55,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:55,547 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-07-20 22:16:55,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:55,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579027039] [2020-07-20 22:16:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:55,643 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:55,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:16:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:55,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:55,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579027039] [2020-07-20 22:16:55,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:55,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:16:55,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83558876] [2020-07-20 22:16:55,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:16:55,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:16:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:16:55,838 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-07-20 22:16:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:55,948 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-07-20 22:16:55,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:16:55,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:16:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:55,960 INFO L225 Difference]: With dead ends: 37 [2020-07-20 22:16:55,960 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 22:16:55,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 22:16:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 22:16:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 22:16:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 22:16:56,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-07-20 22:16:56,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:56,015 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 22:16:56,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:16:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 22:16:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:16:56,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:56,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:56,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:56,232 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1244203718, now seen corresponding path program 1 times [2020-07-20 22:16:56,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:56,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514191231] [2020-07-20 22:16:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:56,269 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:56,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:56,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:16:56,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:56,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:56,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514191231] [2020-07-20 22:16:56,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:56,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:16:56,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605386752] [2020-07-20 22:16:56,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:16:56,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:16:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:56,364 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-07-20 22:16:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:56,412 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-07-20 22:16:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:16:56,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-07-20 22:16:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:56,414 INFO L225 Difference]: With dead ends: 24 [2020-07-20 22:16:56,414 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 22:16:56,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 22:16:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 22:16:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 22:16:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 22:16:56,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12 [2020-07-20 22:16:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:56,425 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 22:16:56,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:16:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 22:16:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 22:16:56,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:56,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:56,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:56,639 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash 263826484, now seen corresponding path program 2 times [2020-07-20 22:16:56,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:56,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396895812] [2020-07-20 22:16:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:56,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:16:56,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:56,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:56,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396895812] [2020-07-20 22:16:56,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:56,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 22:16:56,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465347214] [2020-07-20 22:16:56,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:16:56,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:56,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:16:56,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:16:56,886 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-07-20 22:16:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:56,968 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-20 22:16:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:16:56,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-07-20 22:16:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:56,972 INFO L225 Difference]: With dead ends: 32 [2020-07-20 22:16:56,972 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 22:16:56,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:16:56,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 22:16:56,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 22:16:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:16:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 22:16:56,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2020-07-20 22:16:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:56,983 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 22:16:56,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:16:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 22:16:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 22:16:56,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:56,986 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:57,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:57,200 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 386905900, now seen corresponding path program 3 times [2020-07-20 22:16:57,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:57,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697380109] [2020-07-20 22:16:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:57,260 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 22:16:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:57,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:57,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:16:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:57,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697380109] [2020-07-20 22:16:57,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:57,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 22:16:57,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414375324] [2020-07-20 22:16:57,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 22:16:57,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:57,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 22:16:57,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-07-20 22:16:57,948 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 22 states. [2020-07-20 22:16:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:58,190 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-20 22:16:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 22:16:58,192 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-07-20 22:16:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:58,193 INFO L225 Difference]: With dead ends: 34 [2020-07-20 22:16:58,194 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 22:16:58,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-07-20 22:16:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 22:16:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 22:16:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 22:16:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-20 22:16:58,210 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-07-20 22:16:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:58,210 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-20 22:16:58,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 22:16:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-20 22:16:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:16:58,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:58,213 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:58,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:58,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:58,431 INFO L82 PathProgramCache]: Analyzing trace with hash -680671446, now seen corresponding path program 4 times [2020-07-20 22:16:58,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:58,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412503077] [2020-07-20 22:16:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:58,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:16:58,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 22:16:58,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:58,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:58,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412503077] [2020-07-20 22:16:58,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:58,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-20 22:16:58,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629948204] [2020-07-20 22:16:58,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 22:16:58,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 22:16:58,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:16:58,617 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-07-20 22:16:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:58,688 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-07-20 22:16:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 22:16:58,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-20 22:16:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:58,690 INFO L225 Difference]: With dead ends: 29 [2020-07-20 22:16:58,691 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:16:58,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:16:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:16:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:16:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:16:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:16:58,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-07-20 22:16:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:58,693 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:16:58,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 22:16:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:16:58,693 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:16:58,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:58,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:16:59,210 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-07-20 22:16:59,215 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:16:59,216 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:16:59,216 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:16:59,216 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:16:59,217 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:16:59,217 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:16:59,217 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-20 22:16:59,217 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-20 22:16:59,217 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-07-20 22:16:59,218 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-07-20 22:16:59,218 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= 2 main_~i~0) (<= main_~i~0 2) (= 2 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (= 14 main_~sn~0)) (and (<= main_~i~0 4) (= 6 main_~sn~0) (<= 4 main_~i~0)) (and (= 0 main_~sn~0) (<= main_~i~0 1) (<= 1 main_~i~0)) (and (< main_~i~0 7) (= 10 main_~sn~0) (<= 6 main_~i~0)) (and (<= 9 main_~i~0) (= 16 main_~sn~0)) (and (<= main_~i~0 3) (= 4 main_~sn~0) (<= 3 main_~i~0)) (and (<= 5 main_~i~0) (= 8 main_~sn~0) (<= main_~i~0 5)) (and (<= 7 main_~i~0) (= 12 main_~sn~0) (< main_~i~0 8))) [2020-07-20 22:16:59,218 INFO L264 CegarLoopResult]: At program point L13-4(lines 13 15) the Hoare annotation is: (or (= 16 main_~sn~0) (= 0 main_~sn~0)) [2020-07-20 22:16:59,218 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 22:16:59,219 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:16:59,219 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 22:16:59,219 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:16:59,219 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 22:16:59,219 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:16:59,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:16:59 BoogieIcfgContainer [2020-07-20 22:16:59,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:16:59,247 INFO L168 Benchmark]: Toolchain (without parser) took 4645.79 ms. Allocated memory was 145.2 MB in the beginning and 234.9 MB in the end (delta: 89.7 MB). Free memory was 103.4 MB in the beginning and 94.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 99.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:59,248 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 22:16:59,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.63 ms. Allocated memory is still 145.2 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:59,250 INFO L168 Benchmark]: Boogie Preprocessor took 38.13 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:59,251 INFO L168 Benchmark]: RCFGBuilder took 434.96 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 170.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:59,253 INFO L168 Benchmark]: TraceAbstraction took 3823.45 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 170.0 MB in the beginning and 94.0 MB in the end (delta: 76.1 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:59,258 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.63 ms. Allocated memory is still 145.2 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.13 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.96 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 170.7 MB in the end (delta: -78.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3823.45 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 170.0 MB in the beginning and 94.0 MB in the end (delta: 76.1 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (((((((((2 <= i && i <= 2) && 2 == sn) || ((i <= 8 && 8 <= i) && 14 == sn)) || ((i <= 4 && 6 == sn) && 4 <= i)) || ((0 == sn && i <= 1) && 1 <= i)) || ((i < 7 && 10 == sn) && 6 <= i)) || (9 <= i && 16 == sn)) || ((i <= 3 && 4 == sn) && 3 <= i)) || ((5 <= i && 8 == sn) && i <= 5)) || ((7 <= i && 12 == sn) && i < 8) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 5, TraceHistogramMax: 9, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 22 SDslu, 308 SDs, 0 SdLazy, 255 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 23 NumberOfFragments, 100 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 94 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 9164 SizeOfPredicates, 7 NumberOfNonLiveVariables, 186 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 81/243 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 correct! Received shutdown request...