/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s3iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:19:00,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:19:00,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:19:00,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:19:00,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:19:00,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:19:00,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:19:00,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:19:00,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:19:00,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:19:00,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:19:00,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:19:00,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:19:00,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:19:00,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:19:00,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:19:00,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:19:00,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:19:00,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:19:00,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:19:00,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:19:00,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:19:00,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:19:00,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:19:00,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:19:00,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:19:00,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:19:00,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:19:00,187 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:19:00,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:19:00,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:19:00,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:19:00,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:19:00,203 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:19:00,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:19:00,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:19:00,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:19:00,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:19:00,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:19:00,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:19:00,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:19:00,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:19:00,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:19:00,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:19:00,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:19:00,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:19:00,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:19:00,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:19:00,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:19:00,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:19:00,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:19:00,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:19:00,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:19:00,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:19:00,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:19:00,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:00,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:19:00,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:19:00,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:19:00,482 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:19:00,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:19:00,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:19:00,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:19:00,500 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:19:00,501 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-21 20:19:00,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/334dea35c/a987b43c142e4dad9c9ce6db7b55fd1d/FLAGfd4f8a9c4 [2020-07-21 20:19:01,046 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:19:01,048 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-21 20:19:01,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/334dea35c/a987b43c142e4dad9c9ce6db7b55fd1d/FLAGfd4f8a9c4 [2020-07-21 20:19:01,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/334dea35c/a987b43c142e4dad9c9ce6db7b55fd1d [2020-07-21 20:19:01,427 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:19:01,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:19:01,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:01,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:19:01,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:19:01,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bf7ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01, skipping insertion in model container [2020-07-21 20:19:01,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:19:01,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:19:01,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:01,671 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:19:01,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:01,708 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:19:01,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01 WrapperNode [2020-07-21 20:19:01,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:01,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:19:01,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:19:01,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:19:01,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... [2020-07-21 20:19:01,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:19:01,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:19:01,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:19:01,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:19:01,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:19:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:19:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:19:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:19:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:19:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:19:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:19:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:19:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:19:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:19:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:19:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:19:01,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:19:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:19:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:19:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:19:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:19:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:19:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:19:01,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:19:02,220 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:19:02,221 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 20:19:02,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:02 BoogieIcfgContainer [2020-07-21 20:19:02,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:19:02,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:19:02,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:19:02,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:19:02,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:19:01" (1/3) ... [2020-07-21 20:19:02,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46203944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:02, skipping insertion in model container [2020-07-21 20:19:02,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:01" (2/3) ... [2020-07-21 20:19:02,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46203944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:02, skipping insertion in model container [2020-07-21 20:19:02,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:02" (3/3) ... [2020-07-21 20:19:02,236 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-07-21 20:19:02,250 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:19:02,260 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:19:02,296 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:19:02,334 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:19:02,334 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:19:02,334 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:19:02,334 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:19:02,334 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:19:02,334 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:19:02,335 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:19:02,335 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:19:02,353 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 20:19:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 20:19:02,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:02,360 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 20:19:02,361 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 20:19:02,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:02,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111595031] [2020-07-21 20:19:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:02,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:19:02,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:19:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:02,571 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 20:19:02,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:19:02,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111595031] [2020-07-21 20:19:02,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:19:02,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:19:02,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178520141] [2020-07-21 20:19:02,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:19:02,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:19:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:19:02,597 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-21 20:19:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:02,726 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-21 20:19:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:19:02,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 20:19:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:02,738 INFO L225 Difference]: With dead ends: 63 [2020-07-21 20:19:02,739 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 20:19:02,743 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 20:19:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 20:19:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 20:19:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 20:19:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 20:19:02,795 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 20:19:02,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:02,795 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 20:19:02,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:19:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 20:19:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 20:19:02,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:02,797 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 20:19:03,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:03,003 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:03,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:03,004 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 20:19:03,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:03,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31115472] [2020-07-21 20:19:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:03,099 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:03,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 20:19:03,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:03,195 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 20:19:03,195 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:03,206 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:03,207 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:03,207 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-21 20:19:03,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:03,237 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-21 20:19:03,239 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:03,252 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:03,252 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:03,253 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 20:19:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:03,468 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:03,469 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-21 20:19:03,471 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:03,538 INFO L624 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2020-07-21 20:19:03,542 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 20:19:03,542 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:74, output treesize:35 [2020-07-21 20:19:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 20:19:03,610 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-07-21 20:19:03,611 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:19:03,624 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:19:03,625 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:19:03,626 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:42, output treesize:10 [2020-07-21 20:19:03,651 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:19:03,699 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 20:19:03,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:03,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:04,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:18,198 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 20:19:18,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:19:18,272 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 20:19:18,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31115472] [2020-07-21 20:19:18,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:18,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 20:19:18,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151893389] [2020-07-21 20:19:18,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 20:19:18,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 20:19:18,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=313, Unknown=3, NotChecked=0, Total=380 [2020-07-21 20:19:18,280 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-07-21 20:19:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:19,938 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-07-21 20:19:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 20:19:19,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-07-21 20:19:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:19,943 INFO L225 Difference]: With dead ends: 51 [2020-07-21 20:19:19,943 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 20:19:19,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=105, Invalid=542, Unknown=3, NotChecked=0, Total=650 [2020-07-21 20:19:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 20:19:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-21 20:19:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 20:19:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 20:19:19,959 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 20:19:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:19,960 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 20:19:19,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 20:19:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 20:19:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 20:19:19,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:19,964 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 20:19:20,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:20,178 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 20:19:20,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:20,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605016783] [2020-07-21 20:19:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:20,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:20,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:19:20,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:20,283 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 20:19:20,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:20,319 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 20:19:20,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605016783] [2020-07-21 20:19:20,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:20,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:19:20,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663686199] [2020-07-21 20:19:20,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:19:20,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:19:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:19:20,322 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 20:19:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:20,499 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 20:19:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 20:19:20,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 20:19:20,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:20,502 INFO L225 Difference]: With dead ends: 45 [2020-07-21 20:19:20,502 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 20:19:20,502 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 20:19:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 20:19:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 20:19:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 20:19:20,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 20:19:20,518 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 20:19:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:20,519 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 20:19:20,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:19:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 20:19:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 20:19:20,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:20,522 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 20:19:20,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:20,737 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:20,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 20:19:20,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:20,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75516308] [2020-07-21 20:19:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:20,783 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:20,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:20,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:19:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:20,841 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 20:19:20,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:19:20,904 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 20:19:20,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75516308] [2020-07-21 20:19:20,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:19:20,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:19:20,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580729286] [2020-07-21 20:19:20,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:19:20,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:20,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:19:20,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:19:20,906 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 20:19:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:21,072 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 20:19:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:19:21,073 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 20:19:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:21,074 INFO L225 Difference]: With dead ends: 49 [2020-07-21 20:19:21,074 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 20:19:21,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:19:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 20:19:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 20:19:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 20:19:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 20:19:21,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 20:19:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:21,087 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 20:19:21,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:19:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 20:19:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 20:19:21,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:21,088 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 20:19:21,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:21,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 20:19:21,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:21,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908032402] [2020-07-21 20:19:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:21,356 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:19:21,357 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:19:21,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:21,441 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:19:21,441 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:19:21,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:21,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:19:21 BoogieIcfgContainer [2020-07-21 20:19:21,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:19:21,687 INFO L168 Benchmark]: Toolchain (without parser) took 20259.00 ms. Allocated memory was 145.8 MB in the beginning and 245.4 MB in the end (delta: 99.6 MB). Free memory was 101.9 MB in the beginning and 105.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 95.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:21,688 INFO L168 Benchmark]: CDTParser took 0.23 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 20:19:21,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.57 ms. Allocated memory is still 145.8 MB. Free memory was 101.5 MB in the beginning and 91.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:21,690 INFO L168 Benchmark]: Boogie Preprocessor took 141.35 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 90.9 MB in the beginning and 180.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:21,691 INFO L168 Benchmark]: RCFGBuilder took 375.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 163.7 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:21,692 INFO L168 Benchmark]: TraceAbstraction took 19457.64 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 163.7 MB in the beginning and 105.9 MB in the end (delta: 57.8 MB). Peak memory consumption was 99.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:21,696 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 277.57 ms. Allocated memory is still 145.8 MB. Free memory was 101.5 MB in the beginning and 91.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.35 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 90.9 MB in the beginning and 180.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 163.7 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19457.64 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 163.7 MB in the beginning and 105.9 MB in the end (delta: 57.8 MB). Peak memory consumption was 99.7 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)=9, 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={8366:0}, i=0, malloc(sizeof(int)*N)={8366:0}, N=2, sum={8368:0}] [L30] COND TRUE i