/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:35:26,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:35:26,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:35:26,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:35:26,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:35:26,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:35:26,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:35:26,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:35:26,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:35:26,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:35:26,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:35:26,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:35:26,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:35:26,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:35:26,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:35:26,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:35:26,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:35:26,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:35:26,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:35:26,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:35:26,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:35:26,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:35:26,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:35:26,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:35:26,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 13:35:26,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:35:26,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:35:26,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:35:26,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:35:26,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:35:26,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:35:26,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:35:26,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:35:26,294 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:35:26,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:35:26,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:35:26,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:35:26,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:35:26,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:35:26,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:35:26,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:35:26,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:35:26,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:35:26,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:35:26,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:35:26,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:35:26,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:35:26,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:35:26,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:35:26,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:35:26,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:35:26,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:35:26,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:35:26,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:35:26,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:35:26,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:26,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:35:26,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:35:26,299 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 -> 2 [2020-07-21 13:35:26,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:35:26,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:35:26,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:35:26,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:35:26,615 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:35:26,616 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-2.c [2020-07-21 13:35:26,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54736051e/64bc2051aa48477d94835cbe63d867e6/FLAG83085b891 [2020-07-21 13:35:27,194 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:35:27,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-2.c [2020-07-21 13:35:27,206 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54736051e/64bc2051aa48477d94835cbe63d867e6/FLAG83085b891 [2020-07-21 13:35:27,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54736051e/64bc2051aa48477d94835cbe63d867e6 [2020-07-21 13:35:27,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:35:27,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:35:27,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:35:27,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:35:27,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:35:27,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:27,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8201e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27, skipping insertion in model container [2020-07-21 13:35:27,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:27,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:35:27,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:35:27,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:35:27,827 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:35:27,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:35:27,892 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:35:27,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27 WrapperNode [2020-07-21 13:35:27,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:35:27,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:35:27,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:35:27,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:35:28,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:28,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:28,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:28,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:28,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:28,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:28,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... [2020-07-21 13:35:28,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:35:28,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:35:28,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:35:28,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:35:28,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:35:28,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:35:28,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:35:28,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:35:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:35:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:35:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:35:28,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:35:28,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:35:28,480 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:35:28,480 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 13:35:28,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:35:28 BoogieIcfgContainer [2020-07-21 13:35:28,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:35:28,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:35:28,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:35:28,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:35:28,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:35:27" (1/3) ... [2020-07-21 13:35:28,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd9aa55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:35:28, skipping insertion in model container [2020-07-21 13:35:28,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:35:27" (2/3) ... [2020-07-21 13:35:28,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd9aa55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:35:28, skipping insertion in model container [2020-07-21 13:35:28,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:35:28" (3/3) ... [2020-07-21 13:35:28,495 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_14-2.c [2020-07-21 13:35:28,510 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:35:28,520 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:35:28,539 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:35:28,581 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:35:28,581 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:35:28,581 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:35:28,582 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:35:28,582 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:35:28,582 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:35:28,583 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:35:28,583 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:35:28,607 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-07-21 13:35:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 13:35:28,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:28,616 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] [2020-07-21 13:35:28,617 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:28,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1694527455, now seen corresponding path program 1 times [2020-07-21 13:35:28,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:28,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074198391] [2020-07-21 13:35:28,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:28,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:28,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:28,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:35:28,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:28,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074198391] [2020-07-21 13:35:28,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:28,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:28,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914067974] [2020-07-21 13:35:28,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:28,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:28,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:28,872 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-07-21 13:35:28,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:28,970 INFO L93 Difference]: Finished difference Result 155 states and 287 transitions. [2020-07-21 13:35:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:28,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 13:35:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:28,997 INFO L225 Difference]: With dead ends: 155 [2020-07-21 13:35:28,997 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 13:35:29,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 13:35:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-07-21 13:35:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 13:35:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 174 transitions. [2020-07-21 13:35:29,057 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 174 transitions. Word has length 24 [2020-07-21 13:35:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:29,058 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 174 transitions. [2020-07-21 13:35:29,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 174 transitions. [2020-07-21 13:35:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 13:35:29,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:29,060 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] [2020-07-21 13:35:29,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:29,275 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1694520263, now seen corresponding path program 1 times [2020-07-21 13:35:29,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:29,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835811257] [2020-07-21 13:35:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:29,379 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:29,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:35:29,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:29,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835811257] [2020-07-21 13:35:29,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:29,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:29,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742494521] [2020-07-21 13:35:29,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:29,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:29,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:29,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:29,414 INFO L87 Difference]: Start difference. First operand 94 states and 174 transitions. Second operand 3 states. [2020-07-21 13:35:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:29,451 INFO L93 Difference]: Finished difference Result 97 states and 177 transitions. [2020-07-21 13:35:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:29,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 13:35:29,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:29,453 INFO L225 Difference]: With dead ends: 97 [2020-07-21 13:35:29,453 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 13:35:29,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 13:35:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-07-21 13:35:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 13:35:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 175 transitions. [2020-07-21 13:35:29,468 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 175 transitions. Word has length 24 [2020-07-21 13:35:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:29,469 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 175 transitions. [2020-07-21 13:35:29,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 175 transitions. [2020-07-21 13:35:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 13:35:29,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:29,471 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] [2020-07-21 13:35:29,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:29,684 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:29,685 INFO L82 PathProgramCache]: Analyzing trace with hash 106179553, now seen corresponding path program 1 times [2020-07-21 13:35:29,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:29,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239647334] [2020-07-21 13:35:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:29,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:35:29,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:29,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239647334] [2020-07-21 13:35:29,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:29,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:29,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146775433] [2020-07-21 13:35:29,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:29,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:29,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:29,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:29,772 INFO L87 Difference]: Start difference. First operand 95 states and 175 transitions. Second operand 3 states. [2020-07-21 13:35:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:29,804 INFO L93 Difference]: Finished difference Result 222 states and 412 transitions. [2020-07-21 13:35:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:29,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 13:35:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:29,807 INFO L225 Difference]: With dead ends: 222 [2020-07-21 13:35:29,807 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 13:35:29,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 13:35:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-07-21 13:35:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 13:35:29,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 237 transitions. [2020-07-21 13:35:29,825 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 237 transitions. Word has length 24 [2020-07-21 13:35:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:29,826 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 237 transitions. [2020-07-21 13:35:29,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 237 transitions. [2020-07-21 13:35:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 13:35:29,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:29,828 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] [2020-07-21 13:35:30,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:30,045 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash 106172361, now seen corresponding path program 1 times [2020-07-21 13:35:30,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:30,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590218993] [2020-07-21 13:35:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:30,119 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:30,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:35:30,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 13:35:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:35:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:35:30,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:35:30,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590218993] [2020-07-21 13:35:30,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:35:30,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 13:35:30,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734303678] [2020-07-21 13:35:30,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 13:35:30,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:35:30,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 13:35:30,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:30,140 INFO L87 Difference]: Start difference. First operand 130 states and 237 transitions. Second operand 3 states. [2020-07-21 13:35:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:35:30,159 INFO L93 Difference]: Finished difference Result 179 states and 322 transitions. [2020-07-21 13:35:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 13:35:30,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 13:35:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:35:30,161 INFO L225 Difference]: With dead ends: 179 [2020-07-21 13:35:30,162 INFO L226 Difference]: Without dead ends: 130 [2020-07-21 13:35:30,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 13:35:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-21 13:35:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-07-21 13:35:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-21 13:35:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 230 transitions. [2020-07-21 13:35:30,176 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 230 transitions. Word has length 24 [2020-07-21 13:35:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:35:30,177 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 230 transitions. [2020-07-21 13:35:30,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 13:35:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 230 transitions. [2020-07-21 13:35:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 13:35:30,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:35:30,179 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] [2020-07-21 13:35:30,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:30,393 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:35:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:35:30,394 INFO L82 PathProgramCache]: Analyzing trace with hash -914888801, now seen corresponding path program 1 times [2020-07-21 13:35:30,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:35:30,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789283226] [2020-07-21 13:35:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:30,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:35:30,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:35:30,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:35:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:35:30,462 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:35:30,496 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:35:30,496 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:35:30,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:35:30,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:35:30 BoogieIcfgContainer [2020-07-21 13:35:30,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:35:30,811 INFO L168 Benchmark]: Toolchain (without parser) took 3251.23 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 103.5 MB in the beginning and 172.1 MB in the end (delta: -68.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:30,813 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory is still 121.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 13:35:30,817 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.27 ms. Allocated memory is still 139.5 MB. Free memory was 103.0 MB in the beginning and 91.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:30,818 INFO L168 Benchmark]: Boogie Preprocessor took 157.18 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 180.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:30,819 INFO L168 Benchmark]: RCFGBuilder took 434.79 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 156.8 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:30,821 INFO L168 Benchmark]: TraceAbstraction took 2319.65 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 156.8 MB in the beginning and 172.1 MB in the end (delta: -15.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:35:30,830 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory is still 121.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.27 ms. Allocated memory is still 139.5 MB. Free memory was 103.0 MB in the beginning and 91.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.18 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 91.5 MB in the beginning and 180.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.79 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 156.8 MB in the end (delta: 23.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2319.65 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 156.8 MB in the beginning and 172.1 MB in the end (delta: -15.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 217]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L6] int p1 = __VERIFIER_nondet_int(); [L7] int lk1; [L9] int p2 = __VERIFIER_nondet_int(); [L10] int lk2; [L12] int p3 = __VERIFIER_nondet_int(); [L13] int lk3; [L15] int p4 = __VERIFIER_nondet_int(); [L16] int lk4; [L18] int p5 = __VERIFIER_nondet_int(); [L19] int lk5; [L21] int p6 = __VERIFIER_nondet_int(); [L22] int lk6; [L24] int p7 = __VERIFIER_nondet_int(); [L25] int lk7; [L27] int p8 = __VERIFIER_nondet_int(); [L28] int lk8; [L30] int p9 = __VERIFIER_nondet_int(); [L31] int lk9; [L33] int p10 = __VERIFIER_nondet_int(); [L34] int lk10; [L36] int p11 = __VERIFIER_nondet_int(); [L37] int lk11; [L39] int p12 = __VERIFIER_nondet_int(); [L40] int lk12; [L42] int p13 = __VERIFIER_nondet_int(); [L43] int lk13; [L45] int p14 = __VERIFIER_nondet_int(); [L46] int lk14; [L49] int cond; VAL [p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L51] COND TRUE 1 [L52] cond = __VERIFIER_nondet_int() [L53] COND FALSE !(cond == 0) [L56] lk1 = 0 [L58] lk2 = 0 [L60] lk3 = 0 [L62] lk4 = 0 [L64] lk5 = 0 [L66] lk6 = 0 [L68] lk7 = 0 [L70] lk8 = 0 [L72] lk9 = 0 [L74] lk10 = 0 [L76] lk11 = 0 [L78] lk12 = 0 [L80] lk13 = 0 [L82] lk14 = 0 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=0, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L86] COND FALSE !(p1 != 0) VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=0, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L90] COND FALSE !(p2 != 0) VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=0, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L94] COND TRUE p3 != 0 [L95] lk3 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=0, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L98] COND TRUE p4 != 0 [L99] lk4 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=0, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L102] COND TRUE p5 != 0 [L103] lk5 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=0, lk7=0, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L106] COND TRUE p6 != 0 [L107] lk6 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=0, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L110] COND TRUE p7 != 0 [L111] lk7 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L114] COND FALSE !(p8 != 0) VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=0, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L118] COND TRUE p9 != 0 [L119] lk9 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L122] COND TRUE p10 != 0 [L123] lk10 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=0, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L126] COND TRUE p11 != 0 [L127] lk11 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=0, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L130] COND TRUE p12 != 0 [L131] lk12 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=0, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L134] COND TRUE p13 != 0 [L135] lk13 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=0, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L138] COND TRUE p14 != 0 [L139] lk14 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L144] COND FALSE !(p1 != 0) VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L149] COND FALSE !(p2 != 0) VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] [L217] __VERIFIER_error() VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk2=0, lk3=1, lk4=1, lk5=1, lk6=1, lk7=1, lk8=0, lk9=1, p1=0, p10=-1, p11=1, p12=-1, p13=-1, p14=-1, p2=0, p3=1, p4=-1, p5=-1, p6=-1, p7=-1, p8=0, p9=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 458 SDtfs, 227 SDslu, 301 SDs, 0 SdLazy, 20 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 5382 SizeOfPredicates, 0 NumberOfNonLiveVariables, 574 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...