/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_15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:50:08,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:50:08,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:50:08,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:50:08,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:50:08,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:50:08,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:50:08,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:50:08,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:50:08,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:50:08,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:50:08,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:50:08,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:50:08,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:50:08,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:50:08,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:50:08,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:50:08,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:50:08,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:50:08,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:50:08,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:50:08,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:50:08,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:50:08,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:50:08,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:50:08,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:50:08,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:50:08,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:50:08,628 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 13:50:08,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:50:08,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:50:08,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:50:08,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:50:08,644 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:50:08,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:50:08,645 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:50:08,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:50:08,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:50:08,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:50:08,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:50:08,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:50:08,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:50:08,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:50:08,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:50:08,646 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:50:08,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:50:08,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:50:08,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:50:08,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:50:08,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:50:08,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:50:08,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:50:08,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:50:08,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:50:08,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:50:08,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:08,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:50:08,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:50:08,649 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 13:50:08,916 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:50:08,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:50:08,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:50:08,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:50:08,934 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:50:08,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-1.c [2020-07-20 13:50:09,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ee42fe4/50401c47746a44d8a0f281e581cec8d9/FLAGf09a307d3 [2020-07-20 13:50:09,553 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:50:09,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_15-1.c [2020-07-20 13:50:09,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ee42fe4/50401c47746a44d8a0f281e581cec8d9/FLAGf09a307d3 [2020-07-20 13:50:09,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ee42fe4/50401c47746a44d8a0f281e581cec8d9 [2020-07-20 13:50:09,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:50:09,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:50:09,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:09,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:50:09,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:50:09,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14581acf 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 13:50:09,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:50:09" (1/1) ... [2020-07-20 13:50:09,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:50:09,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:50:10,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:10,167 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:50:10,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:50:10,300 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:50:10,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10 WrapperNode [2020-07-20 13:50:10,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:50:10,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:50:10,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:50:10,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:50:10,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (1/1) ... [2020-07-20 13:50:10,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (1/1) ... [2020-07-20 13:50:10,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (1/1) ... [2020-07-20 13:50:10,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (1/1) ... [2020-07-20 13:50:10,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (1/1) ... [2020-07-20 13:50:10,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (1/1) ... [2020-07-20 13:50:10,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (1/1) ... [2020-07-20 13:50:10,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:50:10,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:50:10,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:50:10,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:50:10,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (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 13:50:10,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:50:10,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:50:10,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:50:10,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:50:10,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:50:10,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:50:10,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:50:10,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:50:10,830 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:50:10,830 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 13:50:10,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:50:10 BoogieIcfgContainer [2020-07-20 13:50:10,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:50:10,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:50:10,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:50:10,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:50:10,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:50:09" (1/3) ... [2020-07-20 13:50:10,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df639cc 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 13:50:10,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:50:10" (2/3) ... [2020-07-20 13:50:10,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df639cc 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 13:50:10,841 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 13:50:10,842 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_15-1.c [2020-07-20 13:50:10,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:50:10,857 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:50:10,873 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:50:10,895 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:50:10,896 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:50:10,896 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:50:10,896 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:50:10,896 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:50:10,897 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:50:10,897 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:50:10,897 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:50:10,917 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-07-20 13:50:10,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:50:10,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:10,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:10,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:10,933 INFO L82 PathProgramCache]: Analyzing trace with hash -563352914, now seen corresponding path program 1 times [2020-07-20 13:50:10,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:10,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434002563] [2020-07-20 13:50:10,943 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 13:50:11,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:11,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:11,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:11,170 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 13:50:11,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:11,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434002563] [2020-07-20 13:50:11,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:11,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:11,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729441320] [2020-07-20 13:50:11,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:11,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:11,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:11,201 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-07-20 13:50:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:11,279 INFO L93 Difference]: Finished difference Result 164 states and 305 transitions. [2020-07-20 13:50:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:11,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 13:50:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:11,304 INFO L225 Difference]: With dead ends: 164 [2020-07-20 13:50:11,304 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 13:50:11,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 13:50:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 13:50:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-07-20 13:50:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-20 13:50:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 186 transitions. [2020-07-20 13:50:11,364 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 186 transitions. Word has length 25 [2020-07-20 13:50:11,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:11,365 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 186 transitions. [2020-07-20 13:50:11,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:11,365 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 186 transitions. [2020-07-20 13:50:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:50:11,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:11,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:11,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:11,581 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash -563360106, now seen corresponding path program 1 times [2020-07-20 13:50:11,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:11,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221244848] [2020-07-20 13:50:11,583 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 13:50:11,699 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:50:11,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:11,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:11,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:11,723 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 13:50:11,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:11,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221244848] [2020-07-20 13:50:11,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:11,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:11,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385995333] [2020-07-20 13:50:11,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:11,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:11,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:11,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:11,731 INFO L87 Difference]: Start difference. First operand 100 states and 186 transitions. Second operand 3 states. [2020-07-20 13:50:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:11,758 INFO L93 Difference]: Finished difference Result 103 states and 189 transitions. [2020-07-20 13:50:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:11,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 13:50:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:11,761 INFO L225 Difference]: With dead ends: 103 [2020-07-20 13:50:11,761 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 13:50:11,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 13:50:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 13:50:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-07-20 13:50:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 13:50:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 187 transitions. [2020-07-20 13:50:11,776 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 187 transitions. Word has length 25 [2020-07-20 13:50:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:11,776 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 187 transitions. [2020-07-20 13:50:11,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 187 transitions. [2020-07-20 13:50:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:50:11,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:11,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:11,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:11,992 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1737469676, now seen corresponding path program 1 times [2020-07-20 13:50:11,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:11,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45285703] [2020-07-20 13:50:11,995 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 13:50:12,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:12,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:12,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:12,082 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 13:50:12,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:12,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45285703] [2020-07-20 13:50:12,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:12,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:12,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167670905] [2020-07-20 13:50:12,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:12,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:12,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:12,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:12,086 INFO L87 Difference]: Start difference. First operand 101 states and 187 transitions. Second operand 3 states. [2020-07-20 13:50:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:12,144 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2020-07-20 13:50:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:12,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 13:50:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:12,147 INFO L225 Difference]: With dead ends: 236 [2020-07-20 13:50:12,147 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 13:50:12,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 13:50:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 13:50:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-07-20 13:50:12,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 13:50:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 253 transitions. [2020-07-20 13:50:12,182 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 253 transitions. Word has length 25 [2020-07-20 13:50:12,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:12,182 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 253 transitions. [2020-07-20 13:50:12,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 253 transitions. [2020-07-20 13:50:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:50:12,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:12,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:12,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:12,401 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1737462484, now seen corresponding path program 1 times [2020-07-20 13:50:12,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:12,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825346039] [2020-07-20 13:50:12,404 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 13:50:12,481 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:12,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:50:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:50:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:50:12,498 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 13:50:12,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:50:12,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825346039] [2020-07-20 13:50:12,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:50:12,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:50:12,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904273129] [2020-07-20 13:50:12,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:50:12,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:50:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:50:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:50:12,501 INFO L87 Difference]: Start difference. First operand 138 states and 253 transitions. Second operand 3 states. [2020-07-20 13:50:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:50:12,519 INFO L93 Difference]: Finished difference Result 190 states and 344 transitions. [2020-07-20 13:50:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:50:12,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 13:50:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:50:12,522 INFO L225 Difference]: With dead ends: 190 [2020-07-20 13:50:12,522 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 13:50:12,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 13:50:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 13:50:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-20 13:50:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-20 13:50:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 246 transitions. [2020-07-20 13:50:12,533 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 246 transitions. Word has length 25 [2020-07-20 13:50:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:50:12,534 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 246 transitions. [2020-07-20 13:50:12,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:50:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 246 transitions. [2020-07-20 13:50:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:50:12,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:50:12,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:50:12,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:12,751 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:50:12,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:50:12,752 INFO L82 PathProgramCache]: Analyzing trace with hash 149121774, now seen corresponding path program 1 times [2020-07-20 13:50:12,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:50:12,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907363485] [2020-07-20 13:50:12,754 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 13:50:12,812 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:50:12,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:50:12,813 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:50:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:50:12,832 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:50:12,897 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:50:12,898 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:50:13,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:50:13,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:50:13 BoogieIcfgContainer [2020-07-20 13:50:13,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:50:13,171 INFO L168 Benchmark]: Toolchain (without parser) took 3240.41 ms. Allocated memory was 135.3 MB in the beginning and 227.0 MB in the end (delta: 91.8 MB). Free memory was 99.2 MB in the beginning and 161.5 MB in the end (delta: -62.3 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:13,172 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 13:50:13,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.34 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 98.8 MB in the beginning and 178.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:13,174 INFO L168 Benchmark]: Boogie Preprocessor took 61.05 ms. Allocated memory is still 200.3 MB. Free memory was 178.7 MB in the beginning and 176.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:13,175 INFO L168 Benchmark]: RCFGBuilder took 472.51 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 152.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:13,176 INFO L168 Benchmark]: TraceAbstraction took 2332.38 ms. Allocated memory was 200.3 MB in the beginning and 227.0 MB in the end (delta: 26.7 MB). Free memory was 152.1 MB in the beginning and 161.5 MB in the end (delta: -9.5 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 13:50:13,180 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.34 ms. Allocated memory was 135.3 MB in the beginning and 200.3 MB in the end (delta: 65.0 MB). Free memory was 98.8 MB in the beginning and 178.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.05 ms. Allocated memory is still 200.3 MB. Free memory was 178.7 MB in the beginning and 176.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 472.51 ms. Allocated memory is still 200.3 MB. Free memory was 176.1 MB in the beginning and 152.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2332.38 ms. Allocated memory was 200.3 MB in the beginning and 227.0 MB in the end (delta: 26.7 MB). Free memory was 152.1 MB in the beginning and 161.5 MB in the end (delta: -9.5 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 231]: 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; [L48] int p15 = __VERIFIER_nondet_int(); [L49] int lk15; [L52] int cond; VAL [p1=0, p10=1, p11=1, p12=1, p13=-1, p14=1, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L54] COND TRUE 1 [L55] cond = __VERIFIER_nondet_int() [L56] COND FALSE !(cond == 0) [L59] lk1 = 0 [L61] lk2 = 0 [L63] lk3 = 0 [L65] lk4 = 0 [L67] lk5 = 0 [L69] lk6 = 0 [L71] lk7 = 0 [L73] lk8 = 0 [L75] lk9 = 0 [L77] lk10 = 0 [L79] lk11 = 0 [L81] lk12 = 0 [L83] lk13 = 0 [L85] lk14 = 0 [L87] lk15 = 0 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L91] COND FALSE !(p1 != 0) VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L95] COND FALSE !(p2 != 0) VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L99] COND TRUE p3 != 0 [L100] lk3 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L103] COND TRUE p4 != 0 [L104] lk4 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L107] COND TRUE p5 != 0 [L108] lk5 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L111] COND TRUE p6 != 0 [L112] lk6 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L115] COND TRUE p7 != 0 [L116] lk7 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L119] COND FALSE !(p8 != 0) VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L123] COND TRUE p9 != 0 [L124] lk9 = 1 VAL [cond=1, lk1=0, lk10=0, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L127] COND TRUE p10 != 0 [L128] lk10 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=0, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L131] COND TRUE p11 != 0 [L132] lk11 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=0, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L135] COND TRUE p12 != 0 [L136] lk12 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=0, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L139] COND TRUE p13 != 0 [L140] lk13 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=0, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L143] COND TRUE p14 != 0 [L144] lk14 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L147] COND TRUE p15 != 0 [L148] lk15 = 1 VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L153] COND FALSE !(p1 != 0) VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L158] COND FALSE !(p2 != 0) VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk15=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, p15=1, p2=0, p3=1, p4=1, p5=-1, p6=-1, p7=1, p8=0, p9=1] [L231] __VERIFIER_error() VAL [cond=1, lk1=0, lk10=1, lk11=1, lk12=1, lk13=1, lk14=1, lk15=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, p15=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, 59 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: 488 SDtfs, 243 SDslu, 321 SDs, 0 SdLazy, 20 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred 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, 125 NumberOfCodeBlocks, 121 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 5952 SizeOfPredicates, 0 NumberOfNonLiveVariables, 603 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...