/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:37:32,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:37:32,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:37:32,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:37:32,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:37:32,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:37:32,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:37:32,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:37:32,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:37:32,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:37:32,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:37:32,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:37:32,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:37:32,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:37:32,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:37:32,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:37:32,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:37:32,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:37:32,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:37:32,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:37:32,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:37:32,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:37:32,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:37:32,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:37:32,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:37:32,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:37:32,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:37:32,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:37:32,062 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 17:37:32,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:37:32,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:37:32,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:37:32,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:37:32,090 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:37:32,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:37:32,091 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:37:32,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:37:32,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:37:32,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:37:32,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:37:32,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:37:32,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:37:32,093 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:37:32,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:37:32,094 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:37:32,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:37:32,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:37:32,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:37:32,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:37:32,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:37:32,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:37:32,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:37:32,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:37:32,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:37:32,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:37:32,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:32,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:37:32,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:37:32,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:37:32,406 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:37:32,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:37:32,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:37:32,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:37:32,442 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:37:32,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 17:37:32,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9ae53f5/3dc9ffccb5b0476b83bf5ee1f20687a6/FLAG79a739402 [2020-07-20 17:37:33,085 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:37:33,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn4f.c [2020-07-20 17:37:33,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9ae53f5/3dc9ffccb5b0476b83bf5ee1f20687a6/FLAG79a739402 [2020-07-20 17:37:33,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f9ae53f5/3dc9ffccb5b0476b83bf5ee1f20687a6 [2020-07-20 17:37:33,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:37:33,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:37:33,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:37:33,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:37:33,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:37:33,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2c4696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33, skipping insertion in model container [2020-07-20 17:37:33,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:37:33,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:37:33,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:37:33,693 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:37:33,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:37:33,732 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:37:33,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33 WrapperNode [2020-07-20 17:37:33,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:37:33,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:37:33,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:37:33,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:37:33,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (1/1) ... [2020-07-20 17:37:33,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:37:33,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:37:33,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:37:33,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:37:33,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (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 17:37:33,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:37:33,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:37:33,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:37:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:37:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:37:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:37:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:37:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:37:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:37:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:37:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:37:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:37:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:37:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:37:33,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:37:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:37:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:37:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:37:34,377 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:37:34,378 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 17:37:34,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:37:34 BoogieIcfgContainer [2020-07-20 17:37:34,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:37:34,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:37:34,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:37:34,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:37:34,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:37:33" (1/3) ... [2020-07-20 17:37:34,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6805ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:37:34, skipping insertion in model container [2020-07-20 17:37:34,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:37:33" (2/3) ... [2020-07-20 17:37:34,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6805ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:37:34, skipping insertion in model container [2020-07-20 17:37:34,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:37:34" (3/3) ... [2020-07-20 17:37:34,396 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-07-20 17:37:34,409 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:37:34,418 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:37:34,435 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:37:34,467 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:37:34,468 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:37:34,468 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:37:34,468 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:37:34,469 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:37:34,469 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:37:34,469 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:37:34,469 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:37:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 17:37:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:37:34,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:34,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:37:34,499 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-20 17:37:34,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:34,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696402403] [2020-07-20 17:37:34,517 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 17:37:34,649 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:34,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:37:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:34,688 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 17:37:34,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:37:34,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696402403] [2020-07-20 17:37:34,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:37:34,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:37:34,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715011535] [2020-07-20 17:37:34,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:37:34,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:37:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:37:34,714 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-20 17:37:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:34,744 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-20 17:37:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:37:34,746 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 17:37:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:34,756 INFO L225 Difference]: With dead ends: 62 [2020-07-20 17:37:34,759 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 17:37:34,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:37:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 17:37:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 17:37:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 17:37:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 17:37:34,814 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-20 17:37:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:34,814 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 17:37:34,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:37:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 17:37:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:37:34,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:34,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:37:35,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:35,033 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:35,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-20 17:37:35,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:35,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432448997] [2020-07-20 17:37:35,035 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 17:37:35,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:37:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:35,214 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 17:37:35,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:37:35,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432448997] [2020-07-20 17:37:35,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:37:35,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:37:35,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484811597] [2020-07-20 17:37:35,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:37:35,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:35,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:37:35,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:37:35,221 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-20 17:37:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:35,352 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-20 17:37:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:37:35,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 17:37:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:35,357 INFO L225 Difference]: With dead ends: 56 [2020-07-20 17:37:35,358 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 17:37:35,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 17:37:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 17:37:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-20 17:37:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:37:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 17:37:35,376 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-20 17:37:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:35,376 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 17:37:35,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:37:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 17:37:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:37:35,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:35,378 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, 1, 1] [2020-07-20 17:37:35,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:35,594 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:35,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-20 17:37:35,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:35,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214491855] [2020-07-20 17:37:35,596 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 17:37:35,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:37:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:35,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 17:37:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:35,761 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 17:37:35,762 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:37:35,769 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:35,771 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:37:35,771 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 17:37:35,848 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:37:35,849 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 17:37:35,851 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 17:37:35,867 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 17:37:35,868 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:37:35,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 17:37:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:37:35,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:37:35,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:37:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:37:36,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214491855] [2020-07-20 17:37:36,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 17:37:36,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 13 [2020-07-20 17:37:36,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708430625] [2020-07-20 17:37:36,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 17:37:36,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:36,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 17:37:36,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:37:36,101 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-20 17:37:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:36,377 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 17:37:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:37:36,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-20 17:37:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:36,381 INFO L225 Difference]: With dead ends: 52 [2020-07-20 17:37:36,381 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 17:37:36,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:37:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 17:37:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-20 17:37:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 17:37:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 17:37:36,397 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-20 17:37:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:36,398 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 17:37:36,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 17:37:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 17:37:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:37:36,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:36,400 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, 1, 1] [2020-07-20 17:37:36,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:36,615 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-20 17:37:36,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:36,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583004886] [2020-07-20 17:37:36,618 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 17:37:36,699 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:37:36,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:36,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:37:36,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:37:36,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:37:36,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 17:37:36,887 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 17:37:36,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583004886] [2020-07-20 17:37:36,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:37:36,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2020-07-20 17:37:36,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938229548] [2020-07-20 17:37:36,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 17:37:36,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:36,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 17:37:36,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-07-20 17:37:36,891 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 13 states. [2020-07-20 17:37:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:37,278 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2020-07-20 17:37:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 17:37:37,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-07-20 17:37:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:37,282 INFO L225 Difference]: With dead ends: 111 [2020-07-20 17:37:37,282 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 17:37:37,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2020-07-20 17:37:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 17:37:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2020-07-20 17:37:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 17:37:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-07-20 17:37:37,299 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2020-07-20 17:37:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:37,299 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-07-20 17:37:37,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 17:37:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-07-20 17:37:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 17:37:37,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:37,302 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:37:37,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:37,518 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:37,519 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-20 17:37:37,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:37,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744729660] [2020-07-20 17:37:37,520 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 17:37:38,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:37:38,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:37:38,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:37:38,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:37:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:37:38,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:37:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 17:37:38,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744729660] [2020-07-20 17:37:38,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:37:38,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 17:37:38,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876334819] [2020-07-20 17:37:38,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:37:38,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:37:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:37:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:37:38,754 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 9 states. [2020-07-20 17:37:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:37:38,985 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-07-20 17:37:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:37:38,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-20 17:37:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:37:38,990 INFO L225 Difference]: With dead ends: 93 [2020-07-20 17:37:38,990 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 17:37:38,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:37:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 17:37:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-20 17:37:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 17:37:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-20 17:37:39,011 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-20 17:37:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:37:39,012 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-20 17:37:39,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:37:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-20 17:37:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 17:37:39,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:37:39,013 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:37:39,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:39,235 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:37:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:37:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-20 17:37:39,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:37:39,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215533013] [2020-07-20 17:37:39,237 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:39,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:37:39,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:37:39,323 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:37:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:37:39,357 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:37:39,411 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:37:39,411 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:37:39,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:37:39,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:37:39 BoogieIcfgContainer [2020-07-20 17:37:39,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:37:39,670 INFO L168 Benchmark]: Toolchain (without parser) took 6248.98 ms. Allocated memory was 137.4 MB in the beginning and 249.0 MB in the end (delta: 111.7 MB). Free memory was 102.5 MB in the beginning and 175.2 MB in the end (delta: -72.7 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:39,671 INFO L168 Benchmark]: CDTParser took 0.25 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 17:37:39,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.26 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 91.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:39,673 INFO L168 Benchmark]: Boogie Preprocessor took 136.14 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 179.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:39,673 INFO L168 Benchmark]: RCFGBuilder took 506.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 162.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:39,674 INFO L168 Benchmark]: TraceAbstraction took 5282.78 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 161.4 MB in the beginning and 175.2 MB in the end (delta: -13.8 MB). Peak memory consumption was 33.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:37:39,678 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 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 306.26 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 91.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.14 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 179.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 506.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 162.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5282.78 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 161.4 MB in the beginning and 175.2 MB in the end (delta: -13.8 MB). Peak memory consumption was 33.9 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)=6, 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 *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={1:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={1:0}, N=2] [L29] COND TRUE i