/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_FUNCTIONS --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/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:14:32,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:14:32,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:14:32,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:14:32,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:14:32,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:14:32,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:14:32,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:14:32,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:14:32,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:14:32,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:14:32,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:14:32,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:14:32,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:14:32,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:14:32,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:14:32,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:14:32,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:14:32,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:14:32,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:14:32,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:14:32,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:14:32,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:14:32,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:14:32,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:14:32,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:14:32,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:14:32,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:14:32,524 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 14:14:32,557 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:14:32,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:14:32,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:14:32,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:14:32,560 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:14:32,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:14:32,560 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:14:32,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:14:32,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:14:32,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:14:32,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:14:32,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:14:32,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:14:32,564 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:14:32,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:14:32,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:14:32,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:14:32,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:14:32,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:14:32,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:14:32,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:14:32,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:14:32,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:14:32,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:14:32,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:14:32,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:14:32,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:32,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:14:32,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:14:32,567 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_FUNCTIONS 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 14:14:32,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:14:32,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:14:32,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:14:32,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:14:32,854 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:14:32,855 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-20 14:14:32,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146af8379/02be4f171eee4ab489b9e5bc3775ece9/FLAG0d34e465f [2020-07-20 14:14:33,403 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:14:33,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-07-20 14:14:33,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146af8379/02be4f171eee4ab489b9e5bc3775ece9/FLAG0d34e465f [2020-07-20 14:14:33,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/146af8379/02be4f171eee4ab489b9e5bc3775ece9 [2020-07-20 14:14:33,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:14:33,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:14:33,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:33,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:14:33,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:14:33,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:33" (1/1) ... [2020-07-20 14:14:33,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ac8064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:33, skipping insertion in model container [2020-07-20 14:14:33,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:14:33" (1/1) ... [2020-07-20 14:14:33,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:14:33,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:14:33,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:33,966 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:14:33,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:14:34,004 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:14:34,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34 WrapperNode [2020-07-20 14:14:34,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:14:34,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:14:34,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:14:34,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:14:34,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (1/1) ... [2020-07-20 14:14:34,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (1/1) ... [2020-07-20 14:14:34,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (1/1) ... [2020-07-20 14:14:34,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (1/1) ... [2020-07-20 14:14:34,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (1/1) ... [2020-07-20 14:14:34,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (1/1) ... [2020-07-20 14:14:34,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (1/1) ... [2020-07-20 14:14:34,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:14:34,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:14:34,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:14:34,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:14:34,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (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 14:14:34,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:14:34,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:14:34,202 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:14:34,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:14:34,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:14:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:14:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:14:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:14:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:14:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:14:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 14:14:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:14:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:14:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 14:14:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:14:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:14:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:14:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:14:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:14:34,462 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:14:34,462 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 14:14:34,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:34 BoogieIcfgContainer [2020-07-20 14:14:34,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:14:34,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:14:34,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:14:34,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:14:34,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:14:33" (1/3) ... [2020-07-20 14:14:34,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc6291f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:34, skipping insertion in model container [2020-07-20 14:14:34,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:14:34" (2/3) ... [2020-07-20 14:14:34,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc6291f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:14:34, skipping insertion in model container [2020-07-20 14:14:34,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:14:34" (3/3) ... [2020-07-20 14:14:34,475 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-07-20 14:14:34,488 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:14:34,495 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:14:34,518 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:14:34,547 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:14:34,547 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:14:34,547 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:14:34,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:14:34,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:14:34,548 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:14:34,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:14:34,548 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:14:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 14:14:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 14:14:34,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:34,575 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 14:14:34,575 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-20 14:14:34,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:34,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618695514] [2020-07-20 14:14:34,592 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 14:14:34,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:14:34,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:34,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:34,769 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 14:14:34,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:34,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618695514] [2020-07-20 14:14:34,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:34,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:14:34,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622159688] [2020-07-20 14:14:34,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:14:34,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:14:34,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:14:34,789 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-20 14:14:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:34,914 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-07-20 14:14:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:14:34,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 14:14:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:34,925 INFO L225 Difference]: With dead ends: 66 [2020-07-20 14:14:34,926 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 14:14:34,930 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 14:14:34,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 14:14:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-20 14:14:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 14:14:34,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 14:14:34,970 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-20 14:14:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:34,971 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 14:14:34,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:14:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 14:14:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 14:14:34,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:34,973 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] [2020-07-20 14:14:35,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:35,175 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:35,176 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-20 14:14:35,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:35,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471411168] [2020-07-20 14:14:35,177 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 14:14:35,252 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:14:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:35,314 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 14:14:35,314 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:14:35,322 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:14:35,322 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:14:35,323 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-20 14:14:35,345 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-20 14:14:35,347 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:14:35,352 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:14:35,353 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 14:14:35,354 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-07-20 14:14:35,368 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:14:35,373 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:14:35,402 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 14:14:35,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:35,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471411168] [2020-07-20 14:14:35,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:35,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 14:14:35,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761035840] [2020-07-20 14:14:35,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:14:35,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:14:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:14:35,407 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-20 14:14:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:35,529 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-20 14:14:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:14:35,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-20 14:14:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:35,531 INFO L225 Difference]: With dead ends: 37 [2020-07-20 14:14:35,531 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 14:14:35,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 14:14:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 14:14:35,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 14:14:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 14:14:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-20 14:14:35,540 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-07-20 14:14:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:35,540 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-20 14:14:35,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:14:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-20 14:14:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 14:14:35,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:35,542 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] [2020-07-20 14:14:35,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:35,744 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-07-20 14:14:35,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:35,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894050593] [2020-07-20 14:14:35,746 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 14:14:35,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:35,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:14:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:35,819 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 14:14:35,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:14:35,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894050593] [2020-07-20 14:14:35,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:14:35,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:14:35,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259315831] [2020-07-20 14:14:35,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:14:35,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:35,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:14:35,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:35,822 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 3 states. [2020-07-20 14:14:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:35,859 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 14:14:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:14:35,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-20 14:14:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:35,861 INFO L225 Difference]: With dead ends: 48 [2020-07-20 14:14:35,861 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 14:14:35,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:14:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 14:14:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-20 14:14:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 14:14:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 14:14:35,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-20 14:14:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:35,869 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 14:14:35,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:14:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 14:14:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 14:14:35,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:35,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:14:36,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:36,085 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:36,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-20 14:14:36,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:36,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324472857] [2020-07-20 14:14:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:14:36,138 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:36,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:36,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:14:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:36,190 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 14:14:36,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:14:36,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324472857] [2020-07-20 14:14:36,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:36,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 14:14:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404107201] [2020-07-20 14:14:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 14:14:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 14:14:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:14:36,254 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-07-20 14:14:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:36,383 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 14:14:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:14:36,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-20 14:14:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:36,384 INFO L225 Difference]: With dead ends: 54 [2020-07-20 14:14:36,385 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 14:14:36,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 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 14:14:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 14:14:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-07-20 14:14:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 14:14:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 14:14:36,393 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-20 14:14:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:36,393 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 14:14:36,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 14:14:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 14:14:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 14:14:36,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:36,395 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 14:14:36,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:36,608 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-20 14:14:36,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:36,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369925733] [2020-07-20 14:14:36,611 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 14:14:36,665 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:36,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 14:14:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:36,712 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 13 treesize of output 9 [2020-07-20 14:14:36,713 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:14:36,719 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:14:36,720 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:14:36,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-07-20 14:14:36,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 14:14:36,746 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 21 treesize of output 20 [2020-07-20 14:14:36,747 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:14:36,757 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:14:36,758 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:14:36,758 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-07-20 14:14:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 14:14:36,813 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 25 [2020-07-20 14:14:36,815 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:14:36,824 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:14:36,826 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 14:14:36,827 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:31 [2020-07-20 14:14:36,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 14:14:36,872 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2020-07-20 14:14:36,873 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:14:36,880 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:14:36,881 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:14:36,881 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:7 [2020-07-20 14:14:36,897 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:14:36,900 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:14:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:14:36,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:36,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:14:41,465 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 94 [2020-07-20 14:14:41,466 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:14:41,528 INFO L624 ElimStorePlain]: treesize reduction 40, result has 45.9 percent of original size [2020-07-20 14:14:41,532 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-07-20 14:14:41,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:17 [2020-07-20 14:14:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:14:42,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369925733] [2020-07-20 14:14:42,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:42,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-20 14:14:42,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981179788] [2020-07-20 14:14:42,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 14:14:42,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:42,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 14:14:42,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=299, Unknown=8, NotChecked=0, Total=380 [2020-07-20 14:14:42,205 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 20 states. [2020-07-20 14:14:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:42,698 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-07-20 14:14:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 14:14:42,699 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-07-20 14:14:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:42,700 INFO L225 Difference]: With dead ends: 64 [2020-07-20 14:14:42,701 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 14:14:42,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=124, Invalid=518, Unknown=8, NotChecked=0, Total=650 [2020-07-20 14:14:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 14:14:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-20 14:14:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 14:14:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-07-20 14:14:42,708 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-07-20 14:14:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:42,708 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-07-20 14:14:42,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 14:14:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-07-20 14:14:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 14:14:42,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:42,710 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-07-20 14:14:42,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:42,923 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:42,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-07-20 14:14:42,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:42,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129858990] [2020-07-20 14:14:42,926 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 14:14:42,976 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:14:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 14:14:42,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:14:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:14:43,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:14:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:14:43,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129858990] [2020-07-20 14:14:43,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:14:43,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-20 14:14:43,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427450197] [2020-07-20 14:14:43,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:14:43,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:14:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:14:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:14:43,106 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-07-20 14:14:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:14:43,282 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-07-20 14:14:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:14:43,290 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-07-20 14:14:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:14:43,291 INFO L225 Difference]: With dead ends: 66 [2020-07-20 14:14:43,291 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 14:14:43,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-07-20 14:14:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 14:14:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-07-20 14:14:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 14:14:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-20 14:14:43,304 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-07-20 14:14:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:14:43,305 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-20 14:14:43,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:14:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-20 14:14:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 14:14:43,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:14:43,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 14:14:43,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:43,522 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:14:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:14:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-07-20 14:14:43,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:14:43,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870244784] [2020-07-20 14:14:43,523 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:43,588 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:14:43,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:14:43,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:14:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:14:43,610 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:14:43,634 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:14:43,634 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:14:43,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:14:43,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:14:43 BoogieIcfgContainer [2020-07-20 14:14:43,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:14:43,879 INFO L168 Benchmark]: Toolchain (without parser) took 10131.67 ms. Allocated memory was 145.8 MB in the beginning and 246.4 MB in the end (delta: 100.7 MB). Free memory was 103.4 MB in the beginning and 195.2 MB in the end (delta: -91.8 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:43,880 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 14:14:43,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 92.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:43,881 INFO L168 Benchmark]: Boogie Preprocessor took 130.84 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 92.9 MB in the beginning and 181.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:43,882 INFO L168 Benchmark]: RCFGBuilder took 330.09 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:43,883 INFO L168 Benchmark]: TraceAbstraction took 9409.72 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 164.0 MB in the beginning and 195.2 MB in the end (delta: -31.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:14:43,886 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 92.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.84 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 92.9 MB in the beginning and 181.5 MB in the end (delta: -88.6 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 330.09 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 164.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9409.72 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 164.0 MB in the beginning and 195.2 MB in the end (delta: -31.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=5, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=3] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=3] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=3] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=3] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=3, sum={2:0}] [L29] COND TRUE i