/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 DAGSIZE --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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 21:49:41,425 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 21:49:41,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 21:49:41,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 21:49:41,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 21:49:41,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 21:49:41,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 21:49:41,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 21:49:41,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 21:49:41,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 21:49:41,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 21:49:41,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 21:49:41,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 21:49:41,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 21:49:41,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 21:49:41,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 21:49:41,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 21:49:41,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 21:49:41,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 21:49:41,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 21:49:41,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 21:49:41,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 21:49:41,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 21:49:41,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 21:49:41,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 21:49:41,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 21:49:41,511 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 21:49:41,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 21:49:41,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 21:49:41,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 21:49:41,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 21:49:41,531 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 21:49:41,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 21:49:41,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 21:49:41,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 21:49:41,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 21:49:41,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 21:49:41,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 21:49:41,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 21:49:41,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 21:49:41,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 21:49:41,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 21:49:41,533 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 21:49:41,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 21:49:41,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 21:49:41,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 21:49:41,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 21:49:41,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 21:49:41,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 21:49:41,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 21:49:41,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 21:49:41,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 21:49:41,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 21:49:41,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:41,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 21:49:41,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 21:49:41,536 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 -> DAGSIZE 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 21:49:41,907 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 21:49:41,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 21:49:41,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 21:49:41,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 21:49:41,928 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 21:49:41,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-07-20 21:49:42,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763f4796c/02fbef2dd5f145bfb9d62ce30eb4c694/FLAGabf564664 [2020-07-20 21:49:42,497 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 21:49:42,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2020-07-20 21:49:42,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763f4796c/02fbef2dd5f145bfb9d62ce30eb4c694/FLAGabf564664 [2020-07-20 21:49:42,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/763f4796c/02fbef2dd5f145bfb9d62ce30eb4c694 [2020-07-20 21:49:42,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 21:49:42,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 21:49:42,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:42,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 21:49:42,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 21:49:42,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:42" (1/1) ... [2020-07-20 21:49:42,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b391626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:42, skipping insertion in model container [2020-07-20 21:49:42,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:42" (1/1) ... [2020-07-20 21:49:42,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 21:49:42,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 21:49:43,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:43,127 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 21:49:43,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 21:49:43,175 INFO L208 MainTranslator]: Completed translation [2020-07-20 21:49:43,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43 WrapperNode [2020-07-20 21:49:43,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 21:49:43,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 21:49:43,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 21:49:43,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 21:49:43,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (1/1) ... [2020-07-20 21:49:43,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (1/1) ... [2020-07-20 21:49:43,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (1/1) ... [2020-07-20 21:49:43,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (1/1) ... [2020-07-20 21:49:43,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (1/1) ... [2020-07-20 21:49:43,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (1/1) ... [2020-07-20 21:49:43,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (1/1) ... [2020-07-20 21:49:43,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 21:49:43,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 21:49:43,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 21:49:43,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 21:49:43,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (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 21:49:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 21:49:43,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 21:49:43,383 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 21:49:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 21:49:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 21:49:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 21:49:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 21:49:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 21:49:43,680 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 21:49:43,680 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 21:49:43,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:43 BoogieIcfgContainer [2020-07-20 21:49:43,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 21:49:43,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 21:49:43,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 21:49:43,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 21:49:43,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:49:42" (1/3) ... [2020-07-20 21:49:43,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4687860e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:43, skipping insertion in model container [2020-07-20 21:49:43,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:43" (2/3) ... [2020-07-20 21:49:43,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4687860e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:43, skipping insertion in model container [2020-07-20 21:49:43,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:43" (3/3) ... [2020-07-20 21:49:43,703 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-07-20 21:49:43,722 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 21:49:43,734 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 21:49:43,756 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 21:49:43,808 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 21:49:43,808 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 21:49:43,809 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 21:49:43,809 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 21:49:43,810 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 21:49:43,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 21:49:43,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 21:49:43,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 21:49:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-20 21:49:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:49:43,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:43,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:43,850 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-07-20 21:49:43,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:43,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580185788] [2020-07-20 21:49:43,870 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 21:49:43,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:43,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:43,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:44,041 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 21:49:44,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:44,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580185788] [2020-07-20 21:49:44,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:44,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:44,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676426198] [2020-07-20 21:49:44,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:44,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,072 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-07-20 21:49:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:44,137 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-07-20 21:49:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:44,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 21:49:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:44,156 INFO L225 Difference]: With dead ends: 75 [2020-07-20 21:49:44,156 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 21:49:44,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 21:49:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 21:49:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-20 21:49:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 21:49:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-07-20 21:49:44,207 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-07-20 21:49:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:44,208 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-07-20 21:49:44,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-07-20 21:49:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 21:49:44,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:44,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:44,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,426 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-07-20 21:49:44,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:44,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367637126] [2020-07-20 21:49:44,429 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 21:49:44,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:44,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:44,523 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 21:49:44,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:44,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367637126] [2020-07-20 21:49:44,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:44,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:44,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116561836] [2020-07-20 21:49:44,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:44,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:44,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,533 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-07-20 21:49:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:44,576 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-07-20 21:49:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:44,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-20 21:49:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:44,581 INFO L225 Difference]: With dead ends: 97 [2020-07-20 21:49:44,581 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 21:49:44,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 21:49:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 21:49:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-07-20 21:49:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 21:49:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-07-20 21:49:44,594 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-07-20 21:49:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:44,594 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-07-20 21:49:44,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-07-20 21:49:44,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:44,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:44,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:44,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:44,813 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:44,814 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-07-20 21:49:44,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:44,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841540026] [2020-07-20 21:49:44,816 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 21:49:44,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:44,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:44,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:44,882 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 21:49:44,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:44,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841540026] [2020-07-20 21:49:44,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:44,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:44,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786224176] [2020-07-20 21:49:44,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:44,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:44,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:44,886 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-07-20 21:49:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:44,916 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-07-20 21:49:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:44,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:44,918 INFO L225 Difference]: With dead ends: 90 [2020-07-20 21:49:44,918 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 21:49:44,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 21:49:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 21:49:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-20 21:49:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 21:49:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-07-20 21:49:44,929 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-07-20 21:49:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:44,930 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-07-20 21:49:44,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-07-20 21:49:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:44,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:44,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:45,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,145 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-07-20 21:49:45,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188801284] [2020-07-20 21:49:45,148 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 21:49:45,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:45,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:45,215 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 21:49:45,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:45,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188801284] [2020-07-20 21:49:45,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:45,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:45,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604715069] [2020-07-20 21:49:45,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:45,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:45,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:45,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,218 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-07-20 21:49:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:45,255 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-07-20 21:49:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:45,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:45,262 INFO L225 Difference]: With dead ends: 112 [2020-07-20 21:49:45,262 INFO L226 Difference]: Without dead ends: 110 [2020-07-20 21:49:45,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 21:49:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-20 21:49:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-20 21:49:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 21:49:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-07-20 21:49:45,291 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-07-20 21:49:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:45,292 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-07-20 21:49:45,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-07-20 21:49:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 21:49:45,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:45,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,509 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-07-20 21:49:45,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269878629] [2020-07-20 21:49:45,512 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 21:49:45,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:45,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:45,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:45,566 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 21:49:45,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:45,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269878629] [2020-07-20 21:49:45,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:45,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:45,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273912586] [2020-07-20 21:49:45,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:45,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:45,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:45,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,569 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-07-20 21:49:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:45,611 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-07-20 21:49:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:45,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-20 21:49:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:45,614 INFO L225 Difference]: With dead ends: 184 [2020-07-20 21:49:45,614 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 21:49:45,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 21:49:45,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 21:49:45,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-07-20 21:49:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-20 21:49:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-07-20 21:49:45,628 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-07-20 21:49:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:45,628 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-07-20 21:49:45,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-07-20 21:49:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:45,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,630 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] [2020-07-20 21:49:45,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,834 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-07-20 21:49:45,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:45,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860006451] [2020-07-20 21:49:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:45,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:45,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:45,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:45,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:45,893 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 21:49:45,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:45,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860006451] [2020-07-20 21:49:45,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:45,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:45,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324074784] [2020-07-20 21:49:45,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:45,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:45,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:45,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:45,897 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-07-20 21:49:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:45,920 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-07-20 21:49:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:45,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:45,927 INFO L225 Difference]: With dead ends: 165 [2020-07-20 21:49:45,927 INFO L226 Difference]: Without dead ends: 114 [2020-07-20 21:49:45,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 21:49:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-20 21:49:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-07-20 21:49:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 21:49:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-07-20 21:49:45,942 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-07-20 21:49:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:45,945 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-07-20 21:49:45,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-07-20 21:49:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:45,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:45,947 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] [2020-07-20 21:49:46,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,152 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-07-20 21:49:46,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422642276] [2020-07-20 21:49:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:46,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,203 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 21:49:46,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422642276] [2020-07-20 21:49:46,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074101197] [2020-07-20 21:49:46,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,206 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-07-20 21:49:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,235 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-07-20 21:49:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,238 INFO L225 Difference]: With dead ends: 204 [2020-07-20 21:49:46,238 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 21:49:46,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 21:49:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 21:49:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-07-20 21:49:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-20 21:49:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-07-20 21:49:46,254 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-07-20 21:49:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,255 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-07-20 21:49:46,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-07-20 21:49:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 21:49:46,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,256 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] [2020-07-20 21:49:46,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,466 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-07-20 21:49:46,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392075618] [2020-07-20 21:49:46,469 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,520 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 21:49:46,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,541 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 21:49:46,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392075618] [2020-07-20 21:49:46,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072000784] [2020-07-20 21:49:46,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,546 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-07-20 21:49:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,576 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-07-20 21:49:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 21:49:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,579 INFO L225 Difference]: With dead ends: 352 [2020-07-20 21:49:46,579 INFO L226 Difference]: Without dead ends: 210 [2020-07-20 21:49:46,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 21:49:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-20 21:49:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-07-20 21:49:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-20 21:49:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-07-20 21:49:46,612 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-07-20 21:49:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,612 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-07-20 21:49:46,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-07-20 21:49:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:46,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:46,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-07-20 21:49:46,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:46,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235442503] [2020-07-20 21:49:46,831 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:46,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:46,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:46,880 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 21:49:46,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:46,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235442503] [2020-07-20 21:49:46,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:46,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:46,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235920587] [2020-07-20 21:49:46,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:46,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:46,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:46,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:46,883 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-07-20 21:49:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:46,908 INFO L93 Difference]: Finished difference Result 376 states and 620 transitions. [2020-07-20 21:49:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:46,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:46,912 INFO L225 Difference]: With dead ends: 376 [2020-07-20 21:49:46,912 INFO L226 Difference]: Without dead ends: 374 [2020-07-20 21:49:46,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 21:49:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-07-20 21:49:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 292. [2020-07-20 21:49:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-07-20 21:49:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 466 transitions. [2020-07-20 21:49:46,929 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 466 transitions. Word has length 21 [2020-07-20 21:49:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:46,929 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 466 transitions. [2020-07-20 21:49:46,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 466 transitions. [2020-07-20 21:49:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 21:49:46,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:46,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 21:49:47,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,147 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,148 INFO L82 PathProgramCache]: Analyzing trace with hash 534158954, now seen corresponding path program 1 times [2020-07-20 21:49:47,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645181237] [2020-07-20 21:49:47,149 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:47,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,199 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 21:49:47,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645181237] [2020-07-20 21:49:47,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573277819] [2020-07-20 21:49:47,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,202 INFO L87 Difference]: Start difference. First operand 292 states and 466 transitions. Second operand 3 states. [2020-07-20 21:49:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,231 INFO L93 Difference]: Finished difference Result 680 states and 1092 transitions. [2020-07-20 21:49:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,233 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 21:49:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,237 INFO L225 Difference]: With dead ends: 680 [2020-07-20 21:49:47,237 INFO L226 Difference]: Without dead ends: 398 [2020-07-20 21:49:47,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 21:49:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-07-20 21:49:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 396. [2020-07-20 21:49:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-07-20 21:49:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 622 transitions. [2020-07-20 21:49:47,287 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 622 transitions. Word has length 21 [2020-07-20 21:49:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,287 INFO L479 AbstractCegarLoop]: Abstraction has 396 states and 622 transitions. [2020-07-20 21:49:47,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 622 transitions. [2020-07-20 21:49:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:47,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:47,294 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] [2020-07-20 21:49:47,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,508 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,508 INFO L82 PathProgramCache]: Analyzing trace with hash -878891997, now seen corresponding path program 1 times [2020-07-20 21:49:47,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474165849] [2020-07-20 21:49:47,509 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,557 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 21:49:47,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474165849] [2020-07-20 21:49:47,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450356968] [2020-07-20 21:49:47,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,561 INFO L87 Difference]: Start difference. First operand 396 states and 622 transitions. Second operand 3 states. [2020-07-20 21:49:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,588 INFO L93 Difference]: Finished difference Result 704 states and 1120 transitions. [2020-07-20 21:49:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,593 INFO L225 Difference]: With dead ends: 704 [2020-07-20 21:49:47,593 INFO L226 Difference]: Without dead ends: 702 [2020-07-20 21:49:47,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 21:49:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-07-20 21:49:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 572. [2020-07-20 21:49:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-07-20 21:49:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 878 transitions. [2020-07-20 21:49:47,618 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 878 transitions. Word has length 22 [2020-07-20 21:49:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,618 INFO L479 AbstractCegarLoop]: Abstraction has 572 states and 878 transitions. [2020-07-20 21:49:47,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 878 transitions. [2020-07-20 21:49:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 21:49:47,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:47,621 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] [2020-07-20 21:49:47,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,831 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:47,831 INFO L82 PathProgramCache]: Analyzing trace with hash -177827419, now seen corresponding path program 1 times [2020-07-20 21:49:47,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:47,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439082943] [2020-07-20 21:49:47,833 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:47,867 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:47,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:47,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:47,882 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 21:49:47,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:47,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439082943] [2020-07-20 21:49:47,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:47,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:47,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548249995] [2020-07-20 21:49:47,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:47,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:47,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:47,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:47,886 INFO L87 Difference]: Start difference. First operand 572 states and 878 transitions. Second operand 3 states. [2020-07-20 21:49:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:47,925 INFO L93 Difference]: Finished difference Result 1328 states and 2048 transitions. [2020-07-20 21:49:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:47,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 21:49:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:47,932 INFO L225 Difference]: With dead ends: 1328 [2020-07-20 21:49:47,933 INFO L226 Difference]: Without dead ends: 766 [2020-07-20 21:49:47,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 21:49:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-07-20 21:49:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 764. [2020-07-20 21:49:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-07-20 21:49:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1150 transitions. [2020-07-20 21:49:47,972 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1150 transitions. Word has length 22 [2020-07-20 21:49:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:47,972 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 1150 transitions. [2020-07-20 21:49:47,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1150 transitions. [2020-07-20 21:49:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:47,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:47,977 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] [2020-07-20 21:49:48,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,191 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1475632739, now seen corresponding path program 1 times [2020-07-20 21:49:48,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:48,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337828568] [2020-07-20 21:49:48,192 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,244 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:48,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:48,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:48,258 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 21:49:48,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:48,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337828568] [2020-07-20 21:49:48,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:48,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:48,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320496030] [2020-07-20 21:49:48,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:48,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,261 INFO L87 Difference]: Start difference. First operand 764 states and 1150 transitions. Second operand 3 states. [2020-07-20 21:49:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:48,297 INFO L93 Difference]: Finished difference Result 1328 states and 2016 transitions. [2020-07-20 21:49:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:48,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:48,305 INFO L225 Difference]: With dead ends: 1328 [2020-07-20 21:49:48,305 INFO L226 Difference]: Without dead ends: 1326 [2020-07-20 21:49:48,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 21:49:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2020-07-20 21:49:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1132. [2020-07-20 21:49:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2020-07-20 21:49:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1662 transitions. [2020-07-20 21:49:48,349 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1662 transitions. Word has length 23 [2020-07-20 21:49:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:48,350 INFO L479 AbstractCegarLoop]: Abstraction has 1132 states and 1662 transitions. [2020-07-20 21:49:48,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1662 transitions. [2020-07-20 21:49:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 21:49:48,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:48,353 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] [2020-07-20 21:49:48,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,567 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash -774568161, now seen corresponding path program 1 times [2020-07-20 21:49:48,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:48,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672399320] [2020-07-20 21:49:48,569 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:48,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:48,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:48,638 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 21:49:48,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:48,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672399320] [2020-07-20 21:49:48,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:48,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:48,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388119205] [2020-07-20 21:49:48,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:48,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:48,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:48,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:48,642 INFO L87 Difference]: Start difference. First operand 1132 states and 1662 transitions. Second operand 3 states. [2020-07-20 21:49:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:48,688 INFO L93 Difference]: Finished difference Result 2608 states and 3840 transitions. [2020-07-20 21:49:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:48,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 21:49:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:48,698 INFO L225 Difference]: With dead ends: 2608 [2020-07-20 21:49:48,699 INFO L226 Difference]: Without dead ends: 1486 [2020-07-20 21:49:48,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 21:49:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2020-07-20 21:49:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1484. [2020-07-20 21:49:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1484 states. [2020-07-20 21:49:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2126 transitions. [2020-07-20 21:49:48,764 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2126 transitions. Word has length 23 [2020-07-20 21:49:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:48,765 INFO L479 AbstractCegarLoop]: Abstraction has 1484 states and 2126 transitions. [2020-07-20 21:49:48,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2126 transitions. [2020-07-20 21:49:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:49:48,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:48,768 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 21:49:48,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:48,982 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1500241080, now seen corresponding path program 1 times [2020-07-20 21:49:48,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:48,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945150215] [2020-07-20 21:49:48,984 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:49,049 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:49,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:49,068 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 21:49:49,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:49,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945150215] [2020-07-20 21:49:49,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:49,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:49,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812969357] [2020-07-20 21:49:49,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:49,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:49,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:49,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,074 INFO L87 Difference]: Start difference. First operand 1484 states and 2126 transitions. Second operand 3 states. [2020-07-20 21:49:49,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:49,148 INFO L93 Difference]: Finished difference Result 2512 states and 3600 transitions. [2020-07-20 21:49:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:49,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 21:49:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:49,168 INFO L225 Difference]: With dead ends: 2512 [2020-07-20 21:49:49,168 INFO L226 Difference]: Without dead ends: 2510 [2020-07-20 21:49:49,173 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 21:49:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2020-07-20 21:49:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2252. [2020-07-20 21:49:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2252 states. [2020-07-20 21:49:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 3150 transitions. [2020-07-20 21:49:49,294 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 3150 transitions. Word has length 24 [2020-07-20 21:49:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:49,295 INFO L479 AbstractCegarLoop]: Abstraction has 2252 states and 3150 transitions. [2020-07-20 21:49:49,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 3150 transitions. [2020-07-20 21:49:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 21:49:49,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:49,302 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 21:49:49,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:49,518 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:49,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2093661638, now seen corresponding path program 1 times [2020-07-20 21:49:49,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:49,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582785631] [2020-07-20 21:49:49,519 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:49,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:49,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:49,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:49,589 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 21:49:49,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:49,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582785631] [2020-07-20 21:49:49,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:49,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:49,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556631070] [2020-07-20 21:49:49,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:49,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:49,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:49,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:49,599 INFO L87 Difference]: Start difference. First operand 2252 states and 3150 transitions. Second operand 3 states. [2020-07-20 21:49:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:49,721 INFO L93 Difference]: Finished difference Result 5136 states and 7184 transitions. [2020-07-20 21:49:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:49,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 21:49:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:49,740 INFO L225 Difference]: With dead ends: 5136 [2020-07-20 21:49:49,740 INFO L226 Difference]: Without dead ends: 2894 [2020-07-20 21:49:49,745 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 21:49:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2020-07-20 21:49:49,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2892. [2020-07-20 21:49:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2892 states. [2020-07-20 21:49:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3918 transitions. [2020-07-20 21:49:49,855 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3918 transitions. Word has length 24 [2020-07-20 21:49:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:49,855 INFO L479 AbstractCegarLoop]: Abstraction has 2892 states and 3918 transitions. [2020-07-20 21:49:49,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3918 transitions. [2020-07-20 21:49:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:49:49,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:49,862 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 21:49:50,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,078 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash -736950702, now seen corresponding path program 1 times [2020-07-20 21:49:50,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:50,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800879447] [2020-07-20 21:49:50,079 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:50,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:50,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:50,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:50,135 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 21:49:50,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:50,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800879447] [2020-07-20 21:49:50,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:50,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:50,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667073151] [2020-07-20 21:49:50,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:50,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:50,143 INFO L87 Difference]: Start difference. First operand 2892 states and 3918 transitions. Second operand 3 states. [2020-07-20 21:49:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:50,297 INFO L93 Difference]: Finished difference Result 8526 states and 11471 transitions. [2020-07-20 21:49:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:50,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 21:49:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:50,316 INFO L225 Difference]: With dead ends: 8526 [2020-07-20 21:49:50,317 INFO L226 Difference]: Without dead ends: 2892 [2020-07-20 21:49:50,330 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 21:49:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2020-07-20 21:49:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2892. [2020-07-20 21:49:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2892 states. [2020-07-20 21:49:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 3662 transitions. [2020-07-20 21:49:50,441 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 3662 transitions. Word has length 25 [2020-07-20 21:49:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:50,441 INFO L479 AbstractCegarLoop]: Abstraction has 2892 states and 3662 transitions. [2020-07-20 21:49:50,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 3662 transitions. [2020-07-20 21:49:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 21:49:50,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 21:49:50,449 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 21:49:50,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,671 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 21:49:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 21:49:50,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1438015280, now seen corresponding path program 1 times [2020-07-20 21:49:50,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 21:49:50,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289105429] [2020-07-20 21:49:50,673 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:50,714 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 21:49:50,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 21:49:50,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 21:49:50,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 21:49:50,721 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 21:49:50,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 21:49:50,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289105429] [2020-07-20 21:49:50,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 21:49:50,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 21:49:50,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526113155] [2020-07-20 21:49:50,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 21:49:50,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 21:49:50,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 21:49:50,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 21:49:50,723 INFO L87 Difference]: Start difference. First operand 2892 states and 3662 transitions. Second operand 3 states. [2020-07-20 21:49:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 21:49:50,773 INFO L93 Difference]: Finished difference Result 2892 states and 3662 transitions. [2020-07-20 21:49:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 21:49:50,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-20 21:49:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 21:49:50,775 INFO L225 Difference]: With dead ends: 2892 [2020-07-20 21:49:50,775 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 21:49:50,781 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 21:49:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 21:49:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 21:49:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 21:49:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 21:49:50,782 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-20 21:49:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 21:49:50,800 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 21:49:50,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 21:49:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 21:49:50,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 21:49:51,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 21:49:51,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 21:49:51,089 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 21:49:51,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:51,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 21:49:51,090 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 21:49:51,090 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 21:49:51,090 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 21:49:51,090 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-07-20 21:49:51,090 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-07-20 21:49:51,090 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,091 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-07-20 21:49:51,091 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,091 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-07-20 21:49:51,091 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,091 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,091 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-07-20 21:49:51,091 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-07-20 21:49:51,092 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-07-20 21:49:51,092 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-07-20 21:49:51,092 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-07-20 21:49:51,092 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,093 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,093 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,093 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,093 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-07-20 21:49:51,093 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,093 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-07-20 21:49:51,094 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-07-20 21:49:51,094 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,094 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,094 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-07-20 21:49:51,094 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-07-20 21:49:51,094 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,094 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-07-20 21:49:51,094 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,095 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,095 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-07-20 21:49:51,095 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-07-20 21:49:51,095 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-07-20 21:49:51,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:49:51 BoogieIcfgContainer [2020-07-20 21:49:51,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 21:49:51,113 INFO L168 Benchmark]: Toolchain (without parser) took 8232.69 ms. Allocated memory was 136.8 MB in the beginning and 289.9 MB in the end (delta: 153.1 MB). Free memory was 102.2 MB in the beginning and 254.7 MB in the end (delta: -152.6 MB). Peak memory consumption was 536.8 kB. Max. memory is 7.1 GB. [2020-07-20 21:49:51,113 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 21:49:51,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.89 ms. Allocated memory is still 136.8 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:51,115 INFO L168 Benchmark]: Boogie Preprocessor took 138.38 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.3 MB in the beginning and 178.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:51,115 INFO L168 Benchmark]: RCFGBuilder took 371.43 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 161.0 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-07-20 21:49:51,116 INFO L168 Benchmark]: TraceAbstraction took 7418.91 ms. Allocated memory was 200.8 MB in the beginning and 289.9 MB in the end (delta: 89.1 MB). Free memory was 161.0 MB in the beginning and 254.7 MB in the end (delta: -93.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 21:49:51,118 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.89 ms. Allocated memory is still 136.8 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.38 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.3 MB in the beginning and 178.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.43 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 161.0 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7418.91 ms. Allocated memory was 200.8 MB in the beginning and 289.9 MB in the end (delta: 89.1 MB). Free memory was 161.0 MB in the beginning and 254.7 MB in the end (delta: -93.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.2s, OverallIterations: 18, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1208 SDtfs, 575 SDslu, 831 SDs, 0 SdLazy, 96 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2892occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 780 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 383 NumberOfCodeBlocks, 239 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 365 ConstructedInterpolants, 0 QuantifiedInterpolants, 13957 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1420 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 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 correct! Received shutdown request...