/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/locks/test_locks_14-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:50:07,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:50:07,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:50:07,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:50:07,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:50:07,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:50:07,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:50:07,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:50:07,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:50:07,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:50:07,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:50:07,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:50:07,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:50:07,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:50:07,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:50:07,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:50:07,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:50:07,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:50:07,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:50:07,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:50:07,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:50:07,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:50:07,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:50:07,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:50:07,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:50:07,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:50:07,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:50:07,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:50:07,647 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 13:50:07,665 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:50:07,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:50:07,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:50:07,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:50:07,667 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:50:07,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:50:07,668 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:50:07,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:50:07,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:50:07,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:50:07,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:50:07,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:50:07,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:50:07,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:50:07,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:50:07,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:50:07,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:50:07,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:50:07,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:50:07,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:50:07,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:50:07,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:07,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:50:07,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:50:07,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:50:07,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:50:07,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:07,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:50:07,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:50:07,672 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 13:50:07,999 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:50:08,021 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:50:08,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:50:08,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:50:08,032 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:50:08,033 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-2.c [2020-07-20 13:50:08,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9800034e6/2d02137f75824c87813a2e673ee942cf/FLAG80fa98f1d [2020-07-20 13:50:08,813 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:50:08,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-2.c [2020-07-20 13:50:08,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9800034e6/2d02137f75824c87813a2e673ee942cf/FLAG80fa98f1d [2020-07-20 13:50:09,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9800034e6/2d02137f75824c87813a2e673ee942cf [2020-07-20 13:50:09,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:50:09,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:50:09,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:09,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:50:09,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:50:09,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506a7cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09, skipping insertion in model container [2020-07-20 13:50:09,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:50:09,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:50:09,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:09,442 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:50:09,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:09,498 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:50:09,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09 WrapperNode [2020-07-20 13:50:09,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:09,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:50:09,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:50:09,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:50:09,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:50:09,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:50:09,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:50:09,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:50:09,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (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 13:50:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:50:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:50:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:50:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:50:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:50:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:50:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:50:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:50:10,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:50:10,257 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 13:50:10,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:10 BoogieIcfgContainer [2020-07-20 13:50:10,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:50:10,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:50:10,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:50:10,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:50:10,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:09" (1/3) ... [2020-07-20 13:50:10,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171a473f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:10, skipping insertion in model container [2020-07-20 13:50:10,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:09" (2/3) ... [2020-07-20 13:50:10,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171a473f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:50:10, skipping insertion in model container [2020-07-20 13:50:10,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:10" (3/3) ... [2020-07-20 13:50:10,288 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_14-2.c [2020-07-20 13:50:10,301 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:50:10,311 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:50:10,326 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:50:10,359 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:50:10,359 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:50:10,359 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:50:10,359 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:50:10,360 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:50:10,360 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:50:10,360 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:50:10,360 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:50:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-07-20 13:50:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:50:10,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:10,392 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] [2020-07-20 13:50:10,392 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1694527455, now seen corresponding path program 1 times [2020-07-20 13:50:10,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:10,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876486963] [2020-07-20 13:50:10,412 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 13:50:10,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:10,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:10,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:10,646 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 13:50:10,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:10,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876486963] [2020-07-20 13:50:10,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:10,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:10,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870218472] [2020-07-20 13:50:10,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:10,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:10,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:10,683 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-07-20 13:50:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:10,784 INFO L93 Difference]: Finished difference Result 155 states and 287 transitions. [2020-07-20 13:50:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:10,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 13:50:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:10,811 INFO L225 Difference]: With dead ends: 155 [2020-07-20 13:50:10,811 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 13:50:10,817 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 [2020-07-20 13:50:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 13:50:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-07-20 13:50:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 13:50:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 174 transitions. [2020-07-20 13:50:10,876 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 174 transitions. Word has length 24 [2020-07-20 13:50:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:10,877 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 174 transitions. [2020-07-20 13:50:10,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 174 transitions. [2020-07-20 13:50:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:50:10,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:10,879 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] [2020-07-20 13:50:11,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:11,096 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:11,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1694520263, now seen corresponding path program 1 times [2020-07-20 13:50:11,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:11,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181450923] [2020-07-20 13:50:11,099 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 13:50:11,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:11,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:11,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:11,236 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 13:50:11,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:11,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181450923] [2020-07-20 13:50:11,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:11,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:11,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760819130] [2020-07-20 13:50:11,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:11,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:11,242 INFO L87 Difference]: Start difference. First operand 94 states and 174 transitions. Second operand 3 states. [2020-07-20 13:50:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:11,267 INFO L93 Difference]: Finished difference Result 97 states and 177 transitions. [2020-07-20 13:50:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:11,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 13:50:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:11,270 INFO L225 Difference]: With dead ends: 97 [2020-07-20 13:50:11,270 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 13:50:11,272 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 [2020-07-20 13:50:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 13:50:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-07-20 13:50:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 13:50:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 175 transitions. [2020-07-20 13:50:11,292 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 175 transitions. Word has length 24 [2020-07-20 13:50:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:11,293 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 175 transitions. [2020-07-20 13:50:11,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 175 transitions. [2020-07-20 13:50:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:50:11,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:11,295 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] [2020-07-20 13:50:11,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:11,510 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:11,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash 106179553, now seen corresponding path program 1 times [2020-07-20 13:50:11,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:11,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023904232] [2020-07-20 13:50:11,513 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 13:50:11,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:11,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:11,603 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 13:50:11,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:11,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023904232] [2020-07-20 13:50:11,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:11,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:11,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326778533] [2020-07-20 13:50:11,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:11,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:11,608 INFO L87 Difference]: Start difference. First operand 95 states and 175 transitions. Second operand 3 states. [2020-07-20 13:50:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:11,662 INFO L93 Difference]: Finished difference Result 222 states and 412 transitions. [2020-07-20 13:50:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:11,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 13:50:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:11,671 INFO L225 Difference]: With dead ends: 222 [2020-07-20 13:50:11,672 INFO L226 Difference]: Without dead ends: 132 [2020-07-20 13:50:11,674 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 [2020-07-20 13:50:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-20 13:50:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-07-20 13:50:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 13:50:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 237 transitions. [2020-07-20 13:50:11,694 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 237 transitions. Word has length 24 [2020-07-20 13:50:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:11,695 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 237 transitions. [2020-07-20 13:50:11,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 237 transitions. [2020-07-20 13:50:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:50:11,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:11,698 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] [2020-07-20 13:50:11,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:11,911 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash 106172361, now seen corresponding path program 1 times [2020-07-20 13:50:11,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:11,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879892004] [2020-07-20 13:50:11,915 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 13:50:11,995 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:11,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:12,014 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 13:50:12,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:12,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879892004] [2020-07-20 13:50:12,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:12,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:12,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144477602] [2020-07-20 13:50:12,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:12,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:12,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:12,018 INFO L87 Difference]: Start difference. First operand 130 states and 237 transitions. Second operand 3 states. [2020-07-20 13:50:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:12,047 INFO L93 Difference]: Finished difference Result 179 states and 322 transitions. [2020-07-20 13:50:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:12,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 13:50:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:12,050 INFO L225 Difference]: With dead ends: 179 [2020-07-20 13:50:12,050 INFO L226 Difference]: Without dead ends: 130 [2020-07-20 13:50:12,052 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 [2020-07-20 13:50:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-20 13:50:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-07-20 13:50:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 13:50:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 230 transitions. [2020-07-20 13:50:12,067 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 230 transitions. Word has length 24 [2020-07-20 13:50:12,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:12,067 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 230 transitions. [2020-07-20 13:50:12,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 230 transitions. [2020-07-20 13:50:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:50:12,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:12,069 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] [2020-07-20 13:50:12,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:12,284 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash -914888801, now seen corresponding path program 1 times [2020-07-20 13:50:12,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:12,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895833659] [2020-07-20 13:50:12,287 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 13:50:12,346 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:12,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:50:12,347 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:50:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:50:12,363 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:50:12,399 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:50:12,399 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:50:12,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:12,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:50:12 BoogieIcfgContainer [2020-07-20 13:50:12,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:50:12,679 INFO L168 Benchmark]: Toolchain (without parser) took 3534.88 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 101.8 MB in the beginning and 173.9 MB in the end (delta: -72.0 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:12,681 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 13:50:12,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.39 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 90.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:12,683 INFO L168 Benchmark]: Boogie Preprocessor took 163.60 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.1 MB in the beginning and 180.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:12,684 INFO L168 Benchmark]: RCFGBuilder took 601.93 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 157.2 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:12,685 INFO L168 Benchmark]: TraceAbstraction took 2400.84 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 156.5 MB in the beginning and 173.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:12,690 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 353.39 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 90.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.60 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 90.1 MB in the beginning and 180.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 601.93 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 157.2 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2400.84 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 156.5 MB in the beginning and 173.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 14.6 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: 2.2s, 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, 114 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 5382 SizeOfPredicates, 0 NumberOfNonLiveVariables, 563 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...