/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-fpi/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:14:01,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:14:01,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:14:01,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:14:01,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:14:01,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:14:01,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:14:01,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:14:01,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:14:01,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:14:01,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:14:01,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:14:01,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:14:01,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:14:01,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:14:01,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:14:01,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:14:01,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:14:01,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:14:01,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:14:01,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:14:01,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:14:01,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:14:01,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:14:01,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:14:01,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:14:01,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:14:01,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:14:01,095 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 22:14:01,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:14:01,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:14:01,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:14:01,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:14:01,121 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:14:01,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:14:01,121 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:14:01,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:14:01,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:14:01,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:14:01,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:14:01,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:14:01,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:14:01,122 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:14:01,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:14:01,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:14:01,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:14:01,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:14:01,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:14:01,124 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:14:01,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:14:01,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:14:01,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:14:01,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:14:01,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:14:01,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:14:01,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:01,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:14:01,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:14:01,126 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 22:14:01,394 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:14:01,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:14:01,410 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:14:01,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:14:01,412 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:14:01,412 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-20 22:14:01,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd57e6623/9bafa81e20cc43ce99e35e516c6e2552/FLAG8e48aaed0 [2020-07-20 22:14:01,892 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:14:01,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-20 22:14:01,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd57e6623/9bafa81e20cc43ce99e35e516c6e2552/FLAG8e48aaed0 [2020-07-20 22:14:02,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd57e6623/9bafa81e20cc43ce99e35e516c6e2552 [2020-07-20 22:14:02,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:14:02,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:14:02,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:14:02,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:14:02,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:14:02,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77512fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02, skipping insertion in model container [2020-07-20 22:14:02,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:14:02,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:14:02,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:14:02,549 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:14:02,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:14:02,584 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:14:02,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02 WrapperNode [2020-07-20 22:14:02,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:14:02,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:14:02,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:14:02,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:14:02,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (1/1) ... [2020-07-20 22:14:02,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:14:02,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:14:02,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:14:02,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:14:02,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (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 22:14:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:14:02,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:14:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:14:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:14:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:14:02,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:14:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:14:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:14:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:14:02,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:14:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 22:14:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:14:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 22:14:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 22:14:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 22:14:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 22:14:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 22:14:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:14:02,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:14:03,077 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:14:03,078 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 22:14:03,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:14:03 BoogieIcfgContainer [2020-07-20 22:14:03,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:14:03,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:14:03,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:14:03,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:14:03,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:14:02" (1/3) ... [2020-07-20 22:14:03,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446474ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:14:03, skipping insertion in model container [2020-07-20 22:14:03,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:02" (2/3) ... [2020-07-20 22:14:03,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446474ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:14:03, skipping insertion in model container [2020-07-20 22:14:03,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:14:03" (3/3) ... [2020-07-20 22:14:03,088 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-07-20 22:14:03,096 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:14:03,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:14:03,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:14:03,134 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:14:03,134 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:14:03,134 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:14:03,134 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:14:03,134 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:14:03,134 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:14:03,134 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:14:03,135 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:14:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 22:14:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:14:03,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:03,157 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] [2020-07-20 22:14:03,157 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:03,162 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 22:14:03,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:03,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938455372] [2020-07-20 22:14:03,169 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 22:14:03,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:14:03,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:14:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:14:03,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:14:03,340 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 22:14:03,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:14:03,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938455372] [2020-07-20 22:14:03,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:14:03,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 22:14:03,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085005974] [2020-07-20 22:14:03,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 22:14:03,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:14:03,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 22:14:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 22:14:03,360 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-20 22:14:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:14:03,492 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-20 22:14:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 22:14:03,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 22:14:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:14:03,503 INFO L225 Difference]: With dead ends: 63 [2020-07-20 22:14:03,503 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 22:14:03,507 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 [2020-07-20 22:14:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 22:14:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 22:14:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:14:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 22:14:03,549 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 22:14:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:14:03,549 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 22:14:03,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 22:14:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 22:14:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 22:14:03,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:03,551 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] [2020-07-20 22:14:03,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:03,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 22:14:03,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:03,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943362544] [2020-07-20 22:14:03,770 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 22:14:03,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:14:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:14:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 22:14:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:14:03,897 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 [2020-07-20 22:14:03,897 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:14:03,910 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:14:03,911 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:14:03,912 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-20 22:14:03,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 22:14:03,943 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 [2020-07-20 22:14:03,944 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:14:03,957 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:14:03,958 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:14:03,958 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-20 22:14:04,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 22:14:04,083 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:14:04,084 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 51 treesize of output 49 [2020-07-20 22:14:04,087 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:14:04,122 INFO L624 ElimStorePlain]: treesize reduction 18, result has 70.5 percent of original size [2020-07-20 22:14:04,126 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 22:14:04,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:43 [2020-07-20 22:14:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 22:14:04,194 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:14:04,195 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 39 treesize of output 27 [2020-07-20 22:14:04,196 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 22:14:04,217 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 22:14:04,218 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 22:14:04,219 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:50, output treesize:10 [2020-07-20 22:14:04,246 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:14:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:04,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:14:04,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:14:06,570 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 Int) (main_~a~0.offset Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 2))) (let ((.cse0 (select .cse1 (+ (* v_prenex_1 4) main_~a~0.offset)))) (or (< (div (+ (* .cse0 (- 1)) (* (select (select (store |c_#memory_int| c_main_~a~0.base .cse1) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1)) (- 1)) (- 3)) (+ c_main_~i~0 3)) (not (= 2 .cse0)))))) (forall ((v_prenex_1 Int) (main_~a~0.offset Int)) (let ((.cse3 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 2))) (let ((.cse2 (select .cse3 (+ (* v_prenex_1 4) main_~a~0.offset)))) (or (< c_main_~i~0 (div (+ (* .cse2 (- 1)) (* (select (select (store |c_#memory_int| c_main_~a~0.base .cse3) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1))) (- 3))) (not (= 2 .cse2))))))) is different from false [2020-07-20 22:14:06,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:14:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-07-20 22:14:06,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943362544] [2020-07-20 22:14:06,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:14:06,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-07-20 22:14:06,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814674695] [2020-07-20 22:14:06,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 22:14:06,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:14:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 22:14:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=224, Unknown=1, NotChecked=30, Total=306 [2020-07-20 22:14:06,638 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 18 states. [2020-07-20 22:14:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:14:07,261 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-20 22:14:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 22:14:07,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-07-20 22:14:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:14:07,263 INFO L225 Difference]: With dead ends: 50 [2020-07-20 22:14:07,263 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 22:14:07,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=97, Invalid=412, Unknown=1, NotChecked=42, Total=552 [2020-07-20 22:14:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 22:14:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-20 22:14:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 22:14:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 22:14:07,272 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-20 22:14:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:14:07,273 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 22:14:07,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 22:14:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 22:14:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 22:14:07,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:07,275 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] [2020-07-20 22:14:07,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:07,489 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:07,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:07,490 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-20 22:14:07,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:07,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556213580] [2020-07-20 22:14:07,492 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 22:14:07,543 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:14:07,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:14:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:14:07,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:14:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:07,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:14:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:07,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556213580] [2020-07-20 22:14:07,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:14:07,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 22:14:07,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809115754] [2020-07-20 22:14:07,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:14:07,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:14:07,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:14:07,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:14:07,639 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-20 22:14:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:14:07,800 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-20 22:14:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:14:07,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 22:14:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:14:07,801 INFO L225 Difference]: With dead ends: 45 [2020-07-20 22:14:07,802 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 22:14:07,802 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 [2020-07-20 22:14:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 22:14:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-20 22:14:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 22:14:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 22:14:07,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-20 22:14:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:14:07,810 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 22:14:07,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:14:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 22:14:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:14:07,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:07,812 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] [2020-07-20 22:14:08,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:08,029 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:08,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-20 22:14:08,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:08,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99069295] [2020-07-20 22:14:08,031 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 22:14:08,077 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:14:08,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:14:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:14:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:14:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:08,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:14:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:14:08,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99069295] [2020-07-20 22:14:08,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:14:08,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 22:14:08,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765415821] [2020-07-20 22:14:08,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:14:08,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:14:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:14:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:14:08,162 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-20 22:14:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:14:08,292 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-20 22:14:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 22:14:08,293 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 22:14:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:14:08,294 INFO L225 Difference]: With dead ends: 49 [2020-07-20 22:14:08,294 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:14:08,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:14:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:14:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 22:14:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:14:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 22:14:08,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 22:14:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:14:08,301 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 22:14:08,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:14:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 22:14:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:14:08,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:14:08,303 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] [2020-07-20 22:14:08,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:08,506 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:14:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:14:08,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-20 22:14:08,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:14:08,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461698013] [2020-07-20 22:14:08,509 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 22:14:08,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:14:08,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:14:08,568 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:14:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:14:08,589 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:14:08,614 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:14:08,614 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:14:08,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:14:08,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:14:08 BoogieIcfgContainer [2020-07-20 22:14:08,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:14:08,855 INFO L168 Benchmark]: Toolchain (without parser) took 6529.19 ms. Allocated memory was 137.4 MB in the beginning and 249.0 MB in the end (delta: 111.7 MB). Free memory was 102.0 MB in the beginning and 148.3 MB in the end (delta: -46.2 MB). Peak memory consumption was 65.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:08,856 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 22:14:08,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.63 ms. Allocated memory is still 137.4 MB. Free memory was 101.6 MB in the beginning and 91.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:08,858 INFO L168 Benchmark]: Boogie Preprocessor took 120.98 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 179.1 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:08,858 INFO L168 Benchmark]: RCFGBuilder took 374.48 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:08,859 INFO L168 Benchmark]: TraceAbstraction took 5770.92 ms. Allocated memory was 201.9 MB in the beginning and 249.0 MB in the end (delta: 47.2 MB). Free memory was 162.1 MB in the beginning and 148.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:14:08,863 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.63 ms. Allocated memory is still 137.4 MB. Free memory was 101.6 MB in the beginning and 91.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.98 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.3 MB in the beginning and 179.1 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.48 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 162.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5770.92 ms. Allocated memory was 201.9 MB in the beginning and 249.0 MB in the end (delta: 47.2 MB). Free memory was 162.1 MB in the beginning and 148.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 61.0 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={20977:0}, i=0, malloc(sizeof(int)*N)={20977:0}, N=2, sum={20979:0}] [L30] COND TRUE i