/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:42:28,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:42:28,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:42:28,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:42:28,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:42:28,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:42:28,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:42:28,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:42:28,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:42:28,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:42:28,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:42:28,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:42:28,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:42:28,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:42:28,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:42:28,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:42:28,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:42:28,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:42:28,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:42:28,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:42:28,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:42:28,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:42:28,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:42:28,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:42:28,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:42:28,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:42:28,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:42:28,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:42:28,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:42:28,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:42:28,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:42:28,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:42:28,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:42:28,737 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:42:28,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:42:28,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:42:28,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:42:28,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:42:28,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:42:28,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:42:28,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:42:28,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:42:28,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:42:28,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:42:28,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:42:28,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:42:28,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:42:28,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:42:28,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:42:28,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:42:28,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:42:28,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:42:28,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:42:28,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:42:28,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:42:28,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:28,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:42:28,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:42:28,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:42:29,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:42:29,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:42:29,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:42:29,043 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:42:29,044 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:42:29,044 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-21 16:42:29,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2f7dbf9/3ef05924fd7945d4911eaca5de14528f/FLAGdbadd00a1 [2020-07-21 16:42:29,591 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:42:29,592 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-21 16:42:29,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2f7dbf9/3ef05924fd7945d4911eaca5de14528f/FLAGdbadd00a1 [2020-07-21 16:42:29,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2f7dbf9/3ef05924fd7945d4911eaca5de14528f [2020-07-21 16:42:29,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:42:29,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:42:29,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:42:29,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:42:30,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:42:30,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:42:29" (1/1) ... [2020-07-21 16:42:30,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b51a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30, skipping insertion in model container [2020-07-21 16:42:30,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:42:29" (1/1) ... [2020-07-21 16:42:30,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:42:30,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:42:30,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:42:30,240 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:42:30,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:42:30,354 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:42:30,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30 WrapperNode [2020-07-21 16:42:30,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:42:30,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:42:30,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:42:30,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:42:30,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... [2020-07-21 16:42:30,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... [2020-07-21 16:42:30,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... [2020-07-21 16:42:30,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... [2020-07-21 16:42:30,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... [2020-07-21 16:42:30,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... [2020-07-21 16:42:30,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... [2020-07-21 16:42:30,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:42:30,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:42:30,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:42:30,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:42:30,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:42:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:42:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:42:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:42:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:42:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:42:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:42:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:42:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:42:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:42:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:42:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:42:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:42:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:42:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:42:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:42:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:42:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:42:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:42:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:42:30,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:42:30,763 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 16:42:30,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:42:30 BoogieIcfgContainer [2020-07-21 16:42:30,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:42:30,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:42:30,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:42:30,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:42:30,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:42:29" (1/3) ... [2020-07-21 16:42:30,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4511c97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:42:30, skipping insertion in model container [2020-07-21 16:42:30,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:30" (2/3) ... [2020-07-21 16:42:30,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4511c97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:42:30, skipping insertion in model container [2020-07-21 16:42:30,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:42:30" (3/3) ... [2020-07-21 16:42:30,774 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-21 16:42:30,785 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:42:30,792 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:42:30,805 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:42:30,827 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:42:30,827 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:42:30,827 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:42:30,827 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:42:30,827 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:42:30,828 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:42:30,828 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:42:30,828 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:42:30,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 16:42:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:42:30,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:30,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:30,850 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:30,854 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 16:42:30,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:30,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647971651] [2020-07-21 16:42:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:30,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:30,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:42:30,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:30,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:42:30,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647971651] [2020-07-21 16:42:30,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:42:30,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:42:30,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851225792] [2020-07-21 16:42:30,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:42:30,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:31,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:42:31,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:42:31,011 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 16:42:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:31,031 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 16:42:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:42:31,033 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 16:42:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:31,039 INFO L225 Difference]: With dead ends: 54 [2020-07-21 16:42:31,040 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 16:42:31,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:42:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 16:42:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 16:42:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 16:42:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 16:42:31,083 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-21 16:42:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:31,084 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 16:42:31,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:42:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 16:42:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 16:42:31,086 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:31,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:31,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:31,300 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-21 16:42:31,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:31,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612378500] [2020-07-21 16:42:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:31,384 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:31,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:42:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:31,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:42:31,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612378500] [2020-07-21 16:42:31,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:42:31,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:42:31,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803064421] [2020-07-21 16:42:31,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:42:31,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:42:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:42:31,445 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-21 16:42:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:31,533 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 16:42:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:42:31,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 16:42:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:31,536 INFO L225 Difference]: With dead ends: 40 [2020-07-21 16:42:31,536 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 16:42:31,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:42:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 16:42:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 16:42:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 16:42:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 16:42:31,544 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 16:42:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:31,545 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 16:42:31,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:42:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 16:42:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 16:42:31,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:31,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:31,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:31,758 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:31,759 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 16:42:31,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:31,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040419467] [2020-07-21 16:42:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:31,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:31,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:42:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:31,885 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-21 16:42:31,886 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:31,907 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:31,920 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 16:42:31,921 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:31,934 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:31,934 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:42:31,935 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2020-07-21 16:42:31,973 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 16:42:31,994 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:31,995 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 38 [2020-07-21 16:42:31,996 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:32,038 INFO L624 ElimStorePlain]: treesize reduction 16, result has 63.6 percent of original size [2020-07-21 16:42:32,038 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:42:32,039 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-07-21 16:42:32,204 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:32,205 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 49 [2020-07-21 16:42:32,208 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:32,240 INFO L624 ElimStorePlain]: treesize reduction 30, result has 53.1 percent of original size [2020-07-21 16:42:32,241 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:42:32,242 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2020-07-21 16:42:32,269 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:42:32,269 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:42:32,277 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:42:32,277 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:42:32,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:10 [2020-07-21 16:42:32,297 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:42:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:32,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:42:32,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:42:32,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:42:44,804 WARN L193 SmtUtils]: Spent 12.13 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 16:42:44,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:42:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040419467] [2020-07-21 16:42:44,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:42:44,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-21 16:42:44,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169411302] [2020-07-21 16:42:44,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:42:44,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:42:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:42:44,861 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-21 16:42:49,280 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-07-21 16:42:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:55,013 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-07-21 16:42:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 16:42:55,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-21 16:42:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:55,018 INFO L225 Difference]: With dead ends: 50 [2020-07-21 16:42:55,019 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 16:42:55,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:42:55,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 16:42:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-21 16:42:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 16:42:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 16:42:55,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 16:42:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:55,028 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 16:42:55,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:42:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 16:42:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 16:42:55,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:55,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:55,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:55,246 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:55,248 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 16:42:55,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:55,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409377724] [2020-07-21 16:42:55,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:55,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:55,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:55,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:42:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:55,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:42:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:55,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409377724] [2020-07-21 16:42:55,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:42:55,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 16:42:55,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955348254] [2020-07-21 16:42:55,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:42:55,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:42:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:42:55,389 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 16:42:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:55,573 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 16:42:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:42:55,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 16:42:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:55,577 INFO L225 Difference]: With dead ends: 45 [2020-07-21 16:42:55,577 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 16:42:55,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:42:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 16:42:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 16:42:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 16:42:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 16:42:55,585 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 16:42:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:55,585 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 16:42:55,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:42:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 16:42:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 16:42:55,586 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:55,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:55,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:55,801 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:55,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 16:42:55,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:55,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506018603] [2020-07-21 16:42:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:55,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:55,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:55,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:42:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:55,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:42:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:42:55,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506018603] [2020-07-21 16:42:55,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:42:55,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 16:42:55,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558027973] [2020-07-21 16:42:55,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 16:42:55,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:55,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 16:42:55,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:42:55,935 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 16:42:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:56,055 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 16:42:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:42:56,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 16:42:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:56,057 INFO L225 Difference]: With dead ends: 49 [2020-07-21 16:42:56,057 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 16:42:56,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:42:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 16:42:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 16:42:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 16:42:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 16:42:56,064 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 16:42:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:56,064 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 16:42:56,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 16:42:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 16:42:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 16:42:56,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:56,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:42:56,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:56,267 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:56,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 16:42:56,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:56,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049527350] [2020-07-21 16:42:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:56,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:42:56,312 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:42:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:42:56,335 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:42:56,357 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:42:56,358 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:42:56,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:56,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:42:56 BoogieIcfgContainer [2020-07-21 16:42:56,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:42:56,609 INFO L168 Benchmark]: Toolchain (without parser) took 26614.56 ms. Allocated memory was 145.8 MB in the beginning and 246.4 MB in the end (delta: 100.7 MB). Free memory was 102.0 MB in the beginning and 214.5 MB in the end (delta: -112.5 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:56,610 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:42:56,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.49 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 101.6 MB in the beginning and 181.4 MB in the end (delta: -79.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:56,612 INFO L168 Benchmark]: Boogie Preprocessor took 43.25 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 179.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:56,612 INFO L168 Benchmark]: RCFGBuilder took 367.47 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 162.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:56,613 INFO L168 Benchmark]: TraceAbstraction took 25839.75 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 162.0 MB in the beginning and 214.5 MB in the end (delta: -52.5 MB). Peak memory consumption was 109.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:56,618 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.49 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 101.6 MB in the beginning and 181.4 MB in the end (delta: -79.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.25 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 179.1 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 367.47 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 162.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25839.75 ms. Allocated memory was 202.4 MB in the beginning and 246.4 MB in the end (delta: 44.0 MB). Free memory was 162.0 MB in the beginning and 214.5 MB in the end (delta: -52.5 MB). Peak memory consumption was 109.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=7, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={282:0}, i=0, malloc(sizeof(int)*N)={282:0}, N=2, sum={284:0}] [L30] COND TRUE i