/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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:17:48,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:17:48,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:17:48,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:17:48,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:17:48,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:17:48,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:17:48,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:17:48,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:17:48,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:17:48,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:17:48,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:17:48,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:17:48,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:17:48,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:17:48,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:17:48,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:17:48,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:17:48,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:17:48,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:17:48,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:17:48,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:17:48,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:17:48,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:17:48,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:17:48,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:17:48,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:17:48,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:17:48,494 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 14:17:48,513 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:17:48,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:17:48,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:17:48,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:17:48,515 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:17:48,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:17:48,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:17:48,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:17:48,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:17:48,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:17:48,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:17:48,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:17:48,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:17:48,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:17:48,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:17:48,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:17:48,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:17:48,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:17:48,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:17:48,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:17:48,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:17:48,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:17:48,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:17:48,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:17:48,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:17:48,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:17:48,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:48,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:17:48,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:17:48,520 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 14:17:48,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:17:48,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:17:48,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:17:48,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:17:48,814 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:17:48,815 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-20 14:17:48,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82bfe5a2/b13bf0e930aa49e48beee6189072b3ac/FLAGc1afaed32 [2020-07-20 14:17:49,313 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:17:49,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-20 14:17:49,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82bfe5a2/b13bf0e930aa49e48beee6189072b3ac/FLAGc1afaed32 [2020-07-20 14:17:49,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82bfe5a2/b13bf0e930aa49e48beee6189072b3ac [2020-07-20 14:17:49,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:17:49,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:17:49,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:17:49,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:17:49,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:17:49,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19eb74fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49, skipping insertion in model container [2020-07-20 14:17:49,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:17:49,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:17:49,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:17:49,919 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:17:49,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:17:49,953 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:17:49,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49 WrapperNode [2020-07-20 14:17:49,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:17:49,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:17:49,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:17:49,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:17:49,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (1/1) ... [2020-07-20 14:17:49,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:17:49,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:17:49,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:17:49,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:17:49,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (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 14:17:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:17:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:17:50,142 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:17:50,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:17:50,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:17:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:17:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:17:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:17:50,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:17:50,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:17:50,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:17:50,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:17:50,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:17:50,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:17:50,359 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:17:50,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:17:50 BoogieIcfgContainer [2020-07-20 14:17:50,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:17:50,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:17:50,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:17:50,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:17:50,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:17:49" (1/3) ... [2020-07-20 14:17:50,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db0fb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:17:50, skipping insertion in model container [2020-07-20 14:17:50,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:17:49" (2/3) ... [2020-07-20 14:17:50,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db0fb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:17:50, skipping insertion in model container [2020-07-20 14:17:50,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:17:50" (3/3) ... [2020-07-20 14:17:50,401 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-07-20 14:17:50,429 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:17:50,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:17:50,463 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:17:50,488 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:17:50,488 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:17:50,488 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:17:50,488 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:17:50,489 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:17:50,489 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:17:50,489 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:17:50,489 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:17:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 14:17:50,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:17:50,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:17:50,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:17:50,514 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:17:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:17:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-07-20 14:17:50,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:17:50,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617131582] [2020-07-20 14:17:50,527 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 14:17:50,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:17:50,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:17:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:17:50,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:17:50,632 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 14:17:50,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:17:50,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617131582] [2020-07-20 14:17:50,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:17:50,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:17:50,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360663368] [2020-07-20 14:17:50,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:17:50,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:17:50,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:17:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:17:50,652 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-07-20 14:17:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:17:50,677 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-07-20 14:17:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:17:50,678 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 14:17:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:17:50,689 INFO L225 Difference]: With dead ends: 40 [2020-07-20 14:17:50,689 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 14:17:50,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 14:17:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 14:17:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 14:17:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 14:17:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-20 14:17:50,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2020-07-20 14:17:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:17:50,741 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-20 14:17:50,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:17:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-20 14:17:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:17:50,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:17:50,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:17:50,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:50,958 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:17:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:17:50,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1462047953, now seen corresponding path program 1 times [2020-07-20 14:17:50,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:17:50,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255518784] [2020-07-20 14:17:50,961 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 14:17:50,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:17:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:17:51,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:17:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:17:51,059 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 14:17:51,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:17:51,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255518784] [2020-07-20 14:17:51,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:17:51,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:17:51,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265078237] [2020-07-20 14:17:51,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:17:51,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:17:51,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:17:51,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:17:51,070 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2020-07-20 14:17:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:17:51,115 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-20 14:17:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:17:51,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 14:17:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:17:51,118 INFO L225 Difference]: With dead ends: 32 [2020-07-20 14:17:51,118 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 14:17:51,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 14:17:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 14:17:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-07-20 14:17:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 14:17:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-20 14:17:51,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-07-20 14:17:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:17:51,129 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-20 14:17:51,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:17:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-20 14:17:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:17:51,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:17:51,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:17:51,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:51,336 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:17:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:17:51,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-07-20 14:17:51,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:17:51,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321257127] [2020-07-20 14:17:51,339 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 14:17:51,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:17:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:17:51,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:17:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:17:51,418 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 14:17:51,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:17:51,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321257127] [2020-07-20 14:17:51,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:17:51,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:17:51,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323729505] [2020-07-20 14:17:51,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:17:51,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:17:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:17:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:17:51,422 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-07-20 14:17:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:17:51,490 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-20 14:17:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:17:51,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-20 14:17:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:17:51,492 INFO L225 Difference]: With dead ends: 29 [2020-07-20 14:17:51,493 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 14:17:51,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:17:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 14:17:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-20 14:17:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 14:17:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 14:17:51,501 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2020-07-20 14:17:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:17:51,502 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 14:17:51,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:17:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 14:17:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 14:17:51,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:17:51,503 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:17:51,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:51,705 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:17:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:17:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-07-20 14:17:51,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:17:51,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349633366] [2020-07-20 14:17:51,707 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 14:17:51,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:17:51,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:17:51,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 14:17:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:17:51,787 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:17:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:17:51,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:17:51,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349633366] [2020-07-20 14:17:51,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:17:51,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 14:17:51,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158898441] [2020-07-20 14:17:51,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:17:51,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:17:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:17:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:17:51,816 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-07-20 14:17:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:17:51,892 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-20 14:17:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:17:51,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-20 14:17:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:17:51,894 INFO L225 Difference]: With dead ends: 37 [2020-07-20 14:17:51,894 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 14:17:51,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:17:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 14:17:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 14:17:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 14:17:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-20 14:17:51,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2020-07-20 14:17:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:17:51,904 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-20 14:17:51,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:17:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-20 14:17:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 14:17:51,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:17:51,905 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:17:52,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:52,120 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:17:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:17:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-07-20 14:17:52,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:17:52,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112544480] [2020-07-20 14:17:52,121 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 14:17:52,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:17:52,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:17:52,158 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:17:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:17:52,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:17:52,210 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:17:52,210 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:17:52,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:17:52,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:17:52 BoogieIcfgContainer [2020-07-20 14:17:52,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:17:52,438 INFO L168 Benchmark]: Toolchain (without parser) took 2736.65 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:17:52,439 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 14:17:52,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.36 ms. Allocated memory is still 137.9 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:17:52,441 INFO L168 Benchmark]: Boogie Preprocessor took 31.17 ms. Allocated memory is still 137.9 MB. Free memory was 93.2 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:17:52,442 INFO L168 Benchmark]: RCFGBuilder took 379.71 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 168.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 14:17:52,443 INFO L168 Benchmark]: TraceAbstraction took 2066.18 ms. Allocated memory is still 201.9 MB. Free memory was 167.4 MB in the beginning and 92.7 MB in the end (delta: 74.6 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. [2020-07-20 14:17:52,446 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.36 ms. Allocated memory is still 137.9 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.17 ms. Allocated memory is still 137.9 MB. Free memory was 93.2 MB in the beginning and 91.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.71 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.7 MB in the beginning and 168.1 MB in the end (delta: -76.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2066.18 ms. Allocated memory is still 201.9 MB. Free memory was 167.4 MB in the beginning and 92.7 MB in the end (delta: 74.6 MB). Peak memory consumption was 74.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 VAL [i=0, n=1, x=0, y=0] [L20] COND TRUE i