/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-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:48:07,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:48:07,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:48:07,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:48:07,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:48:07,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:48:07,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:48:07,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:48:07,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:48:07,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:48:07,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:48:07,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:48:07,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:48:07,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:48:07,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:48:07,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:48:07,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:48:07,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:48:07,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:48:07,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:48:07,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:48:07,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:48:07,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:48:07,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:48:07,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:48:07,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:48:07,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:48:07,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:48:07,598 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 22:48:07,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:48:07,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:48:07,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:48:07,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:48:07,630 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:48:07,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:48:07,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:48:07,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:48:07,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:48:07,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:48:07,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:48:07,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:48:07,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:48:07,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:48:07,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:48:07,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:48:07,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:48:07,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:48:07,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:48:07,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:48:07,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:48:07,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:48:07,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:48:07,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:48:07,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:48:07,635 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:48:07,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:48:07,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:48:07,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:48:07,636 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 22:48:07,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:48:07,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:48:07,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:48:07,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:48:07,967 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:48:07,968 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-20 22:48:08,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af48a23b/00f454355d1c4edba59a25fbcb0a4403/FLAGcd912b44c [2020-07-20 22:48:08,552 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:48:08,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-20 22:48:08,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af48a23b/00f454355d1c4edba59a25fbcb0a4403/FLAGcd912b44c [2020-07-20 22:48:08,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af48a23b/00f454355d1c4edba59a25fbcb0a4403 [2020-07-20 22:48:08,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:48:08,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:48:08,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:48:08,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:48:08,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:48:08,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:08" (1/1) ... [2020-07-20 22:48:08,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c73a45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:08, skipping insertion in model container [2020-07-20 22:48:08,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:08" (1/1) ... [2020-07-20 22:48:08,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:48:08,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:48:09,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:48:09,100 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:48:09,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:48:09,137 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:48:09,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09 WrapperNode [2020-07-20 22:48:09,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:48:09,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:48:09,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:48:09,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:48:09,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (1/1) ... [2020-07-20 22:48:09,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (1/1) ... [2020-07-20 22:48:09,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (1/1) ... [2020-07-20 22:48:09,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (1/1) ... [2020-07-20 22:48:09,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (1/1) ... [2020-07-20 22:48:09,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (1/1) ... [2020-07-20 22:48:09,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (1/1) ... [2020-07-20 22:48:09,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:48:09,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:48:09,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:48:09,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:48:09,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (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 22:48:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:48:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:48:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:48:09,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:48:09,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:48:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:48:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:48:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:48:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:48:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:48:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:48:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:48:09,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:48:09,612 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:48:09,613 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:48:09,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:09 BoogieIcfgContainer [2020-07-20 22:48:09,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:48:09,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:48:09,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:48:09,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:48:09,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:48:08" (1/3) ... [2020-07-20 22:48:09,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3222048a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:09, skipping insertion in model container [2020-07-20 22:48:09,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:09" (2/3) ... [2020-07-20 22:48:09,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3222048a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:09, skipping insertion in model container [2020-07-20 22:48:09,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:09" (3/3) ... [2020-07-20 22:48:09,627 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-07-20 22:48:09,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:48:09,647 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:48:09,665 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:48:09,741 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:48:09,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:48:09,742 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:48:09,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:48:09,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:48:09,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:48:09,743 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:48:09,743 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:48:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 22:48:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:48:09,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:48:09,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:48:09,772 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:48:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:48:09,780 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-07-20 22:48:09,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:48:09,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677877615] [2020-07-20 22:48:09,794 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 22:48:09,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:48:09,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:48:09,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 22:48:09,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:48:09,990 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 22:48:09,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:48:09,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677877615] [2020-07-20 22:48:09,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:48:09,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:48:09,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281186750] [2020-07-20 22:48:10,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:48:10,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:48:10,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:48:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:48:10,019 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 22:48:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:48:10,143 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2020-07-20 22:48:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:48:10,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 22:48:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:48:10,157 INFO L225 Difference]: With dead ends: 51 [2020-07-20 22:48:10,158 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 22:48:10,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:48:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 22:48:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 22:48:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 22:48:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-07-20 22:48:10,206 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2020-07-20 22:48:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:48:10,207 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-07-20 22:48:10,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:48:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-07-20 22:48:10,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 22:48:10,209 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:48:10,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:48:10,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:48:10,425 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:48:10,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:48:10,427 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-07-20 22:48:10,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:48:10,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476665705] [2020-07-20 22:48:10,428 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 22:48:10,465 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:48:10,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:48:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 22:48:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:48:10,694 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 22:48:10,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:48:10,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:48:11,028 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 22:48:11,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476665705] [2020-07-20 22:48:11,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:48:11,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 22:48:11,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084994865] [2020-07-20 22:48:11,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 22:48:11,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:48:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 22:48:11,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:48:11,034 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 14 states. [2020-07-20 22:48:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:48:17,583 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-07-20 22:48:17,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 22:48:17,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 22:48:17,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:48:17,587 INFO L225 Difference]: With dead ends: 40 [2020-07-20 22:48:17,587 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 22:48:17,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:48:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 22:48:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 22:48:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 22:48:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-20 22:48:17,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2020-07-20 22:48:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:48:17,598 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-20 22:48:17,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 22:48:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-20 22:48:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 22:48:17,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:48:17,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:48:17,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:48:17,811 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:48:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:48:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 1 times [2020-07-20 22:48:17,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:48:17,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230447343] [2020-07-20 22:48:17,813 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 22:48:17,857 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:48:17,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:48:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:48:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:48:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:48:17,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:48:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:48:17,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230447343] [2020-07-20 22:48:17,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:48:17,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 22:48:17,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891136753] [2020-07-20 22:48:17,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:48:17,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:48:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:48:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:48:17,962 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-07-20 22:48:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:48:18,252 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-07-20 22:48:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 22:48:18,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-20 22:48:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:48:18,256 INFO L225 Difference]: With dead ends: 60 [2020-07-20 22:48:18,256 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 22:48:18,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:48:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 22:48:18,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-07-20 22:48:18,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 22:48:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-07-20 22:48:18,284 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 23 [2020-07-20 22:48:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:48:18,284 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-07-20 22:48:18,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:48:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-07-20 22:48:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 22:48:18,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:48:18,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:48:18,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:48:18,503 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:48:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:48:18,504 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-07-20 22:48:18,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:48:18,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24043335] [2020-07-20 22:48:18,505 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 22:48:18,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:48:18,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:48:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 22:48:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:48:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:48:18,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:48:18,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:48:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 22:48:19,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24043335] [2020-07-20 22:48:19,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 22:48:19,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2020-07-20 22:48:19,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581374522] [2020-07-20 22:48:19,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:48:19,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:48:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:48:19,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-07-20 22:48:19,266 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 6 states. [2020-07-20 22:48:31,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:48:31,847 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-07-20 22:48:31,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:48:31,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-20 22:48:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:48:31,859 INFO L225 Difference]: With dead ends: 63 [2020-07-20 22:48:31,859 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 22:48:31,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:48:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 22:48:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-20 22:48:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 22:48:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-07-20 22:48:31,877 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 25 [2020-07-20 22:48:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:48:31,879 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-07-20 22:48:31,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:48:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-07-20 22:48:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:48:31,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:48:31,882 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:48:32,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:48:32,091 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:48:32,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:48:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1723884779, now seen corresponding path program 1 times [2020-07-20 22:48:32,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:48:32,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637134572] [2020-07-20 22:48:32,093 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 22:48:32,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:48:32,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:48:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 22:48:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:48:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:48:32,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:48:32,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:48:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 1 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 22:48:35,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637134572] [2020-07-20 22:48:35,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:48:35,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2020-07-20 22:48:35,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590904352] [2020-07-20 22:48:35,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 22:48:35,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:48:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 22:48:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2020-07-20 22:48:35,106 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 16 states. [2020-07-20 22:48:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:48:35,338 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2020-07-20 22:48:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:48:35,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-07-20 22:48:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:48:35,341 INFO L225 Difference]: With dead ends: 81 [2020-07-20 22:48:35,341 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:48:35,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2020-07-20 22:48:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:48:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:48:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:48:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:48:35,343 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-20 22:48:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:48:35,344 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:48:35,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 22:48:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:48:35,345 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:48:35,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:48:35,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:48:35,891 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:48:35,892 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:48:35,892 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:48:35,893 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:48:35,893 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:48:35,893 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:48:35,894 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:48:35,894 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:48:35,894 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 22:48:35,894 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:48:35,894 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 22:48:35,894 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-20 22:48:35,895 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-07-20 22:48:35,895 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-07-20 22:48:35,902 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-07-20 22:48:35,902 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-07-20 22:48:35,903 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-07-20 22:48:35,904 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (= (mod (+ main_~l~0 1) 4294967296) (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0 1) 4294967296)) [2020-07-20 22:48:35,904 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (= (mod main_~l~0 4294967296) (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0) 4294967296)) [2020-07-20 22:48:35,904 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-07-20 22:48:35,905 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-07-20 22:48:35,905 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 22:48:35,905 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 22:48:35,905 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:48:35,905 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 22:48:35,905 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 22:48:35,905 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 22:48:35,906 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 22:48:35,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:48:35 BoogieIcfgContainer [2020-07-20 22:48:35,932 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:48:35,936 INFO L168 Benchmark]: Toolchain (without parser) took 27075.68 ms. Allocated memory was 144.2 MB in the beginning and 248.0 MB in the end (delta: 103.8 MB). Free memory was 101.7 MB in the beginning and 115.4 MB in the end (delta: -13.7 MB). Peak memory consumption was 90.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:48:35,943 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 22:48:35,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.31 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:48:35,947 INFO L168 Benchmark]: Boogie Preprocessor took 134.28 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.1 MB in the beginning and 181.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:48:35,949 INFO L168 Benchmark]: RCFGBuilder took 343.61 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 167.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:48:35,951 INFO L168 Benchmark]: TraceAbstraction took 26312.99 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 166.4 MB in the beginning and 115.4 MB in the end (delta: 51.0 MB). Peak memory consumption was 96.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:48:35,966 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.31 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.28 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.1 MB in the beginning and 181.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.61 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 167.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26312.99 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 166.4 MB in the beginning and 115.4 MB in the end (delta: 51.0 MB). Peak memory consumption was 96.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (l + 1) % 4294967296 == (v4 + i + j + k + 1) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.8s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 19.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 68 SDslu, 283 SDs, 0 SdLazy, 502 SolverSat, 30 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 18.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 199 GetRequests, 128 SyntacticMatches, 17 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred 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, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 16 PreInvPairs, 31 NumberOfFragments, 30 HoareAnnotationTreeSize, 16 FomulaSimplifications, 69 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 247 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 104 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 187 ConstructedInterpolants, 2 QuantifiedInterpolants, 34780 SizeOfPredicates, 11 NumberOfNonLiveVariables, 242 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 49/106 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...