/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/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:12:46,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:12:46,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:12:46,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:12:46,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:12:46,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:12:46,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:12:46,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:12:46,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:12:46,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:12:46,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:12:46,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:12:46,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:12:46,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:12:46,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:12:46,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:12:46,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:12:46,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:12:46,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:12:46,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:12:46,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:12:46,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:12:46,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:12:46,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:12:46,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:12:46,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:12:46,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:12:46,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:12:46,872 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 22:12:46,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:12:46,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:12:46,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:12:46,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:12:46,911 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:12:46,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:12:46,911 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:12:46,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:12:46,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:12:46,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:12:46,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:12:46,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:12:46,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:12:46,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:12:46,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:12:46,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:12:46,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:12:46,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:12:46,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:12:46,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:12:46,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:12:46,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:12:46,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:12:46,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:12:46,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:12:46,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:12:46,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:46,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:12:46,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:12:46,915 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 22:12:47,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:12:47,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:12:47,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:12:47,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:12:47,229 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:12:47,230 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-07-20 22:12:47,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74664de67/a09f66069b324326b2b0de8f08911a69/FLAG3555e56ed [2020-07-20 22:12:47,737 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:12:47,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/skippedu.c [2020-07-20 22:12:47,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74664de67/a09f66069b324326b2b0de8f08911a69/FLAG3555e56ed [2020-07-20 22:12:48,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74664de67/a09f66069b324326b2b0de8f08911a69 [2020-07-20 22:12:48,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:12:48,137 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:12:48,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:48,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:12:48,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:12:48,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5ba4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48, skipping insertion in model container [2020-07-20 22:12:48,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:12:48,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:12:48,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:48,363 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:12:48,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:12:48,402 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:12:48,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48 WrapperNode [2020-07-20 22:12:48,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:12:48,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:12:48,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:12:48,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:12:48,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (1/1) ... [2020-07-20 22:12:48,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:12:48,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:12:48,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:12:48,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:12:48,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (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 22:12:48,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:12:48,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:12:48,604 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:12:48,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:12:48,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:12:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:12:48,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:12:48,607 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:12:48,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:12:48,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:12:48,608 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 22:12:48,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:12:48,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 22:12:48,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:12:48,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:12:48,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:12:48,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:12:48,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:12:48,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:12:48,967 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 22:12:48,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:48 BoogieIcfgContainer [2020-07-20 22:12:48,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:12:48,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:12:48,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:12:48,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:12:48,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:12:48" (1/3) ... [2020-07-20 22:12:48,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e0c29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:48, skipping insertion in model container [2020-07-20 22:12:48,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:12:48" (2/3) ... [2020-07-20 22:12:48,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e0c29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:12:48, skipping insertion in model container [2020-07-20 22:12:48,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:12:48" (3/3) ... [2020-07-20 22:12:48,980 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-07-20 22:12:48,991 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:12:48,999 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:12:49,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:12:49,039 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:12:49,039 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:12:49,039 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:12:49,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:12:49,040 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:12:49,040 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:12:49,040 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:12:49,040 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:12:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-20 22:12:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:12:49,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,067 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] [2020-07-20 22:12:49,068 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:49,074 INFO L82 PathProgramCache]: Analyzing trace with hash -978746934, now seen corresponding path program 1 times [2020-07-20 22:12:49,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:49,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19460081] [2020-07-20 22:12:49,084 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 22:12:49,178 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:12:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:49,239 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 22:12:49,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:49,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19460081] [2020-07-20 22:12:49,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:49,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:12:49,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953740213] [2020-07-20 22:12:49,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:12:49,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:49,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:12:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,265 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-07-20 22:12:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:49,342 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-07-20 22:12:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:12:49,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 22:12:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:49,353 INFO L225 Difference]: With dead ends: 67 [2020-07-20 22:12:49,353 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 22:12:49,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:12:49,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 22:12:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 22:12:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 22:12:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 22:12:49,399 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 22:12:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:49,400 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 22:12:49,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:12:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 22:12:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 22:12:49,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,402 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] [2020-07-20 22:12:49,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:49,618 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:49,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:49,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1791807978, now seen corresponding path program 1 times [2020-07-20 22:12:49,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:49,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027775999] [2020-07-20 22:12:49,622 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 22:12:49,694 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:12:49,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:12:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:49,738 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 22:12:49,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:49,778 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 22:12:49,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027775999] [2020-07-20 22:12:49,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:49,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:12:49,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594119215] [2020-07-20 22:12:49,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:12:49,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:49,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:12:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:12:49,783 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-07-20 22:12:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:49,857 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-07-20 22:12:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:12:49,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-07-20 22:12:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:49,859 INFO L225 Difference]: With dead ends: 59 [2020-07-20 22:12:49,860 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 22:12:49,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:12:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 22:12:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 22:12:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 22:12:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 22:12:49,869 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-07-20 22:12:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:49,870 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 22:12:49,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:12:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 22:12:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 22:12:49,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:49,871 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] [2020-07-20 22:12:50,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,085 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:50,087 INFO L82 PathProgramCache]: Analyzing trace with hash 2002160904, now seen corresponding path program 2 times [2020-07-20 22:12:50,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:50,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770754647] [2020-07-20 22:12:50,088 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 22:12:50,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:50,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:50,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:12:50,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:50,187 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 22:12:50,188 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:12:50,193 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:12:50,197 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-20 22:12:50,221 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:12:50,225 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:12:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:12:50,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:12:50,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770754647] [2020-07-20 22:12:50,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:12:50,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:12:50,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221049784] [2020-07-20 22:12:50,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:12:50,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:50,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:12:50,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:12:50,261 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-07-20 22:12:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:50,351 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-07-20 22:12:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:12:50,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-07-20 22:12:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:50,357 INFO L225 Difference]: With dead ends: 55 [2020-07-20 22:12:50,357 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 22:12:50,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:12:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 22:12:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-07-20 22:12:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 22:12:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-20 22:12:50,381 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2020-07-20 22:12:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:50,382 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-20 22:12:50,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:12:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-20 22:12:50,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:12:50,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:50,384 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, 1, 1, 1] [2020-07-20 22:12:50,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:50,592 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash -709829620, now seen corresponding path program 1 times [2020-07-20 22:12:50,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:50,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407489728] [2020-07-20 22:12:50,595 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 22:12:50,657 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:12:50,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:12:50,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 22:12:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:12:50,702 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 20 treesize of output 16 [2020-07-20 22:12:50,703 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:12:50,712 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:12:50,713 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:12:50,713 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-07-20 22:12:50,740 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-20 22:12:50,741 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 22 [2020-07-20 22:12:50,742 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:12:50,747 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:12:50,747 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:12:50,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:17 [2020-07-20 22:12:50,797 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-07-20 22:12:50,797 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2020-07-20 22:12:50,799 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:12:50,800 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:12:50,801 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 22:12:50,819 INFO L624 ElimStorePlain]: treesize reduction 31, result has 18.4 percent of original size [2020-07-20 22:12:50,819 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:12:50,819 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:7 [2020-07-20 22:12:50,832 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:12:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:12:50,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:12:50,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:12:50,935 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 19 treesize of output 17 [2020-07-20 22:12:50,944 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 30 treesize of output 28 [2020-07-20 22:12:50,945 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-20 22:12:50,951 INFO L624 ElimStorePlain]: treesize reduction 6, result has 57.1 percent of original size [2020-07-20 22:12:50,951 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:12:50,953 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:12:50,954 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 22:12:50,954 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:19, output treesize:8 [2020-07-20 22:12:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:12:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407489728] [2020-07-20 22:12:50,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:12:50,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-07-20 22:12:50,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416271883] [2020-07-20 22:12:50,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 22:12:50,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:12:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 22:12:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:12:50,971 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2020-07-20 22:12:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:12:51,351 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-07-20 22:12:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 22:12:51,351 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-07-20 22:12:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:12:51,353 INFO L225 Difference]: With dead ends: 83 [2020-07-20 22:12:51,354 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 22:12:51,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-20 22:12:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 22:12:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2020-07-20 22:12:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 22:12:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-07-20 22:12:51,368 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 31 [2020-07-20 22:12:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:12:51,368 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-07-20 22:12:51,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 22:12:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-07-20 22:12:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:12:51,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:12:51,371 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, 1, 1, 1] [2020-07-20 22:12:51,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,585 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:12:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:12:51,586 INFO L82 PathProgramCache]: Analyzing trace with hash -8765042, now seen corresponding path program 1 times [2020-07-20 22:12:51,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:12:51,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112560767] [2020-07-20 22:12:51,588 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 22:12:51,665 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:12:51,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:12:51,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:12:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:12:51,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:12:51,734 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:12:51,734 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:12:51,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:12:51,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:12:51 BoogieIcfgContainer [2020-07-20 22:12:51,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:12:51,986 INFO L168 Benchmark]: Toolchain (without parser) took 3849.71 ms. Allocated memory was 147.8 MB in the beginning and 241.7 MB in the end (delta: 93.8 MB). Free memory was 104.2 MB in the beginning and 201.2 MB in the end (delta: -96.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 22:12:51,987 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 22:12:51,988 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.09 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 93.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:51,989 INFO L168 Benchmark]: Boogie Preprocessor took 127.08 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.4 MB in the beginning and 181.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:51,989 INFO L168 Benchmark]: RCFGBuilder took 440.47 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 164.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:12:51,990 INFO L168 Benchmark]: TraceAbstraction took 3011.82 ms. Allocated memory was 204.5 MB in the beginning and 241.7 MB in the end (delta: 37.2 MB). Free memory was 163.5 MB in the beginning and 201.2 MB in the end (delta: -37.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 22:12:51,994 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.09 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 93.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.08 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.4 MB in the beginning and 181.9 MB in the end (delta: -88.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.47 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 164.2 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3011.82 ms. Allocated memory was 204.5 MB in the beginning and 241.7 MB in the end (delta: 37.2 MB). Free memory was 163.5 MB in the beginning and 201.2 MB in the end (delta: -37.6 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int SIZE; [L12] const int MAX = 100000; VAL [\old(MAX)=6, \old(SIZE)=3, MAX=100000, SIZE=0] [L16] SIZE = __VERIFIER_nondet_int() [L17] COND TRUE SIZE > 1 && SIZE < MAX [L19] int i; [L20] int *a = malloc(sizeof(int)*SIZE); [L22] i = 0 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND FALSE !(i < SIZE) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L27] COND FALSE !(SIZE % 2 != 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L29] CALL assume_abort_if_not(SIZE % 2 == 0) VAL [\old(cond)=1, \old(SIZE)=0, MAX=100000, SIZE=2] [L4] COND FALSE !(!cond) VAL [\old(cond)=1, \old(SIZE)=0, cond=1, MAX=100000, SIZE=2] [L29] RET assume_abort_if_not(SIZE % 2 == 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] i = 1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] COND TRUE i <= SIZE/2 [L32] EXPR a[2*i-2] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-2]=1, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L32] COND FALSE !(a[2*i-2] > i) [L36] EXPR a[2*i-1] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-1]=2, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L36] COND TRUE a[2*i-1] > i [L38] a[2*i-1] = 2*i-1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] COND FALSE !(i <= SIZE/2) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L42] i = 0 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L42] COND TRUE i < SIZE [L44] EXPR a[i] VAL [\old(SIZE)=0, a={-1:0}, a[i]=1, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L44] CALL __VERIFIER_assert( a[i] <= i ) VAL [\old(cond)=0, \old(SIZE)=0, MAX=100000, SIZE=2] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(SIZE)=0, cond=0, MAX=100000, SIZE=2] [L6] __VERIFIER_error() VAL [\old(cond)=0, \old(SIZE)=0, cond=0, MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 127 SDtfs, 86 SDslu, 218 SDs, 0 SdLazy, 290 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 4 MinimizatonAttempts, 30 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 134 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 10574 SizeOfPredicates, 16 NumberOfNonLiveVariables, 278 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...