/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:53:13,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:53:13,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:53:13,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 19:53:13,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:53:13,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:53:13,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:53:13,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:53:13,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:53:13,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:53:13,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:53:13,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:53:13,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:53:13,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:53:13,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:53:13,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:53:13,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:53:13,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:53:13,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:53:13,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:53:13,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:53:14,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:53:14,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:53:14,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:53:14,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:53:14,021 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:53:14,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:53:14,021 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:53:14,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:53:14,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:53:14,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:53:14,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:53:14,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:53:14,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:53:14,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:53:14,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:53:14,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:53:14,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:53:14,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:53:14,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:53:14,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:53:14,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:53:14,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:53:14,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:53:14,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:53:14,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:53:14,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:53:14,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:14,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:53:14,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:53:14,029 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 -> 2 [2020-07-21 19:53:14,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:53:14,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:53:14,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:53:14,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:53:14,605 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:53:14,606 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-07-21 19:53:14,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639b0b05c/5130f7c111444db3bfe6129e6cb44c16/FLAGc340da493 [2020-07-21 19:53:15,546 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:53:15,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2020-07-21 19:53:15,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639b0b05c/5130f7c111444db3bfe6129e6cb44c16/FLAGc340da493 [2020-07-21 19:53:15,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639b0b05c/5130f7c111444db3bfe6129e6cb44c16 [2020-07-21 19:53:15,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:53:15,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:53:15,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:53:15,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:53:15,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:53:15,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:53:15" (1/1) ... [2020-07-21 19:53:15,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4663fdeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:15, skipping insertion in model container [2020-07-21 19:53:15,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:53:15" (1/1) ... [2020-07-21 19:53:15,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:53:15,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:53:16,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:53:16,251 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:53:16,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:53:16,302 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:53:16,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16 WrapperNode [2020-07-21 19:53:16,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:53:16,306 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:53:16,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:53:16,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:53:16,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... [2020-07-21 19:53:16,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... [2020-07-21 19:53:16,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... [2020-07-21 19:53:16,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... [2020-07-21 19:53:16,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... [2020-07-21 19:53:16,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... [2020-07-21 19:53:16,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... [2020-07-21 19:53:16,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:53:16,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:53:16,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:53:16,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:53:16,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:53:16,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:53:16,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:53:16,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:53:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:53:16,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:53:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:53:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:53:16,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:53:17,092 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:53:17,094 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 19:53:17,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:53:17 BoogieIcfgContainer [2020-07-21 19:53:17,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:53:17,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:53:17,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:53:17,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:53:17,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:53:15" (1/3) ... [2020-07-21 19:53:17,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fb9c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:53:17, skipping insertion in model container [2020-07-21 19:53:17,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:53:16" (2/3) ... [2020-07-21 19:53:17,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fb9c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:53:17, skipping insertion in model container [2020-07-21 19:53:17,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:53:17" (3/3) ... [2020-07-21 19:53:17,127 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-07-21 19:53:17,152 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:53:17,169 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:53:17,204 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:53:17,276 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:53:17,277 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:53:17,277 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:53:17,280 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:53:17,283 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:53:17,289 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:53:17,290 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:53:17,290 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:53:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 19:53:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 19:53:17,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:17,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:17,340 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-07-21 19:53:17,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:17,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003309867] [2020-07-21 19:53:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:17,504 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:17,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:17,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:17,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:17,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003309867] [2020-07-21 19:53:17,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:17,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:17,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436053166] [2020-07-21 19:53:17,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:17,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:17,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:17,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:17,641 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-21 19:53:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:17,735 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-07-21 19:53:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:17,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 19:53:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:17,760 INFO L225 Difference]: With dead ends: 63 [2020-07-21 19:53:17,761 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 19:53:17,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:17,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 19:53:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-07-21 19:53:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 19:53:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-07-21 19:53:17,838 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-07-21 19:53:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:17,840 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-07-21 19:53:17,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-07-21 19:53:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 19:53:17,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:17,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:18,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:18,046 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-07-21 19:53:18,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:18,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803374503] [2020-07-21 19:53:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:18,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:18,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:18,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:18,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:18,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803374503] [2020-07-21 19:53:18,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:18,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:18,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475782856] [2020-07-21 19:53:18,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:18,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:18,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:18,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:18,154 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-07-21 19:53:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:18,221 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-07-21 19:53:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:18,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-07-21 19:53:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:18,225 INFO L225 Difference]: With dead ends: 77 [2020-07-21 19:53:18,225 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 19:53:18,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 19:53:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-07-21 19:53:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 19:53:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-07-21 19:53:18,243 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-07-21 19:53:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:18,243 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-07-21 19:53:18,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-07-21 19:53:18,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 19:53:18,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:18,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:18,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:18,461 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:18,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:18,462 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-07-21 19:53:18,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:18,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984256435] [2020-07-21 19:53:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:18,533 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:18,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:18,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:18,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:18,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984256435] [2020-07-21 19:53:18,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:18,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:18,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652092121] [2020-07-21 19:53:18,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:18,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:18,569 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-07-21 19:53:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:18,605 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-07-21 19:53:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:18,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 19:53:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:18,608 INFO L225 Difference]: With dead ends: 72 [2020-07-21 19:53:18,609 INFO L226 Difference]: Without dead ends: 51 [2020-07-21 19:53:18,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-21 19:53:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-07-21 19:53:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 19:53:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-07-21 19:53:18,625 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-07-21 19:53:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:18,626 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-07-21 19:53:18,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-07-21 19:53:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 19:53:18,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:18,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:18,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:18,843 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-07-21 19:53:18,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:18,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92884095] [2020-07-21 19:53:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:18,904 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:18,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:18,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:18,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:18,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92884095] [2020-07-21 19:53:18,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:18,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:18,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61757896] [2020-07-21 19:53:18,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:18,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:18,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:18,932 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-07-21 19:53:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:18,970 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-07-21 19:53:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:18,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 19:53:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:18,973 INFO L225 Difference]: With dead ends: 88 [2020-07-21 19:53:18,974 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 19:53:18,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 19:53:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-07-21 19:53:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 19:53:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-07-21 19:53:18,994 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-07-21 19:53:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:18,995 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-07-21 19:53:18,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-07-21 19:53:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 19:53:18,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:18,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:19,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:19,216 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-07-21 19:53:19,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:19,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143628184] [2020-07-21 19:53:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:19,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:19,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:19,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:19,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:19,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143628184] [2020-07-21 19:53:19,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:19,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:19,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289561983] [2020-07-21 19:53:19,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:19,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:19,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:19,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:19,304 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-07-21 19:53:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:19,363 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-07-21 19:53:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:19,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 19:53:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:19,366 INFO L225 Difference]: With dead ends: 144 [2020-07-21 19:53:19,367 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 19:53:19,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 19:53:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-07-21 19:53:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 19:53:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-07-21 19:53:19,401 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-07-21 19:53:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:19,402 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-07-21 19:53:19,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:19,403 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-07-21 19:53:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 19:53:19,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:19,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:19,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:19,607 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-07-21 19:53:19,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:19,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035773305] [2020-07-21 19:53:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:19,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:19,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:19,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:19,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035773305] [2020-07-21 19:53:19,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:19,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:19,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983287823] [2020-07-21 19:53:19,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:19,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:19,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:19,681 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-07-21 19:53:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:19,791 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-07-21 19:53:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:19,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 19:53:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:19,802 INFO L225 Difference]: With dead ends: 129 [2020-07-21 19:53:19,803 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 19:53:19,808 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 [2020-07-21 19:53:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 19:53:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-07-21 19:53:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 19:53:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-07-21 19:53:19,847 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-07-21 19:53:19,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:19,850 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-07-21 19:53:19,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-07-21 19:53:19,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 19:53:19,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:19,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:20,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:20,069 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-07-21 19:53:20,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:20,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637156446] [2020-07-21 19:53:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:20,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:53:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:20,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:20,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:20,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637156446] [2020-07-21 19:53:20,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:20,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:20,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86802691] [2020-07-21 19:53:20,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:20,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:20,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:20,159 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-07-21 19:53:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:20,186 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-07-21 19:53:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:20,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 19:53:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:20,190 INFO L225 Difference]: With dead ends: 156 [2020-07-21 19:53:20,191 INFO L226 Difference]: Without dead ends: 154 [2020-07-21 19:53:20,192 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 [2020-07-21 19:53:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-21 19:53:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-07-21 19:53:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-21 19:53:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-07-21 19:53:20,213 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-07-21 19:53:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:20,214 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-07-21 19:53:20,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-07-21 19:53:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 19:53:20,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:20,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:20,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:20,433 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-07-21 19:53:20,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:20,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559088080] [2020-07-21 19:53:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:20,476 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:20,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:20,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:20,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:20,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:20,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559088080] [2020-07-21 19:53:20,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:20,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:20,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126645389] [2020-07-21 19:53:20,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:20,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:20,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:20,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:20,503 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-07-21 19:53:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:20,550 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-07-21 19:53:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:20,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 19:53:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:20,554 INFO L225 Difference]: With dead ends: 272 [2020-07-21 19:53:20,554 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 19:53:20,556 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 [2020-07-21 19:53:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 19:53:20,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-07-21 19:53:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 19:53:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-07-21 19:53:20,577 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-07-21 19:53:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:20,578 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-07-21 19:53:20,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-07-21 19:53:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 19:53:20,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:20,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:20,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:20,796 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-07-21 19:53:20,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:20,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608404071] [2020-07-21 19:53:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:20,840 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:53:20,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:20,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:20,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:20,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608404071] [2020-07-21 19:53:20,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:20,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:20,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254655296] [2020-07-21 19:53:20,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:20,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:20,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:20,870 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-07-21 19:53:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:20,905 INFO L93 Difference]: Finished difference Result 280 states and 428 transitions. [2020-07-21 19:53:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:20,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 19:53:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:20,909 INFO L225 Difference]: With dead ends: 280 [2020-07-21 19:53:20,910 INFO L226 Difference]: Without dead ends: 278 [2020-07-21 19:53:20,912 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 [2020-07-21 19:53:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-21 19:53:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 228. [2020-07-21 19:53:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-21 19:53:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 338 transitions. [2020-07-21 19:53:20,958 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 338 transitions. Word has length 19 [2020-07-21 19:53:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:20,959 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 338 transitions. [2020-07-21 19:53:20,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 338 transitions. [2020-07-21 19:53:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 19:53:20,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:20,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:21,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:21,179 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:21,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1667021686, now seen corresponding path program 1 times [2020-07-21 19:53:21,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:21,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219999324] [2020-07-21 19:53:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:21,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:21,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:21,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:21,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219999324] [2020-07-21 19:53:21,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:21,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:21,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332164864] [2020-07-21 19:53:21,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:21,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:21,266 INFO L87 Difference]: Start difference. First operand 228 states and 338 transitions. Second operand 3 states. [2020-07-21 19:53:21,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:21,297 INFO L93 Difference]: Finished difference Result 340 states and 500 transitions. [2020-07-21 19:53:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:21,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 19:53:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:21,303 INFO L225 Difference]: With dead ends: 340 [2020-07-21 19:53:21,304 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 19:53:21,306 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 [2020-07-21 19:53:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 19:53:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-07-21 19:53:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 19:53:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-07-21 19:53:21,333 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-07-21 19:53:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:21,334 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-07-21 19:53:21,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-07-21 19:53:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 19:53:21,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:21,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:53:21,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:21,552 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-07-21 19:53:21,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:21,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720361510] [2020-07-21 19:53:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:21,618 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:21,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:21,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:21,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720361510] [2020-07-21 19:53:21,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:21,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:21,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055834233] [2020-07-21 19:53:21,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:21,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:21,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:21,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:21,636 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-07-21 19:53:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:21,671 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-07-21 19:53:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:21,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 19:53:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:21,675 INFO L225 Difference]: With dead ends: 524 [2020-07-21 19:53:21,675 INFO L226 Difference]: Without dead ends: 306 [2020-07-21 19:53:21,677 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 [2020-07-21 19:53:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-07-21 19:53:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-07-21 19:53:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-21 19:53:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-07-21 19:53:21,698 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-07-21 19:53:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:21,698 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-07-21 19:53:21,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-07-21 19:53:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 19:53:21,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:21,702 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] [2020-07-21 19:53:21,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:21,919 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:21,920 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-07-21 19:53:21,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:21,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442258207] [2020-07-21 19:53:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:21,970 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:53:21,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:21,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:21,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442258207] [2020-07-21 19:53:21,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:21,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:21,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857386018] [2020-07-21 19:53:21,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:21,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:21,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:21,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:21,989 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-07-21 19:53:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:22,025 INFO L93 Difference]: Finished difference Result 516 states and 720 transitions. [2020-07-21 19:53:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:22,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 19:53:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:22,030 INFO L225 Difference]: With dead ends: 516 [2020-07-21 19:53:22,031 INFO L226 Difference]: Without dead ends: 514 [2020-07-21 19:53:22,033 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 [2020-07-21 19:53:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-07-21 19:53:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 448. [2020-07-21 19:53:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-21 19:53:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 606 transitions. [2020-07-21 19:53:22,065 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 606 transitions. Word has length 20 [2020-07-21 19:53:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:22,067 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 606 transitions. [2020-07-21 19:53:22,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 606 transitions. [2020-07-21 19:53:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 19:53:22,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:22,070 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] [2020-07-21 19:53:22,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:22,287 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1636300943, now seen corresponding path program 1 times [2020-07-21 19:53:22,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:22,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238190269] [2020-07-21 19:53:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:22,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:22,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:22,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:22,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:22,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238190269] [2020-07-21 19:53:22,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:22,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:22,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756998003] [2020-07-21 19:53:22,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:22,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:22,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:22,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:22,381 INFO L87 Difference]: Start difference. First operand 448 states and 606 transitions. Second operand 3 states. [2020-07-21 19:53:22,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:22,423 INFO L93 Difference]: Finished difference Result 668 states and 896 transitions. [2020-07-21 19:53:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:22,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 19:53:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:22,430 INFO L225 Difference]: With dead ends: 668 [2020-07-21 19:53:22,431 INFO L226 Difference]: Without dead ends: 458 [2020-07-21 19:53:22,433 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 [2020-07-21 19:53:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-07-21 19:53:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-07-21 19:53:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-07-21 19:53:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-07-21 19:53:22,462 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-07-21 19:53:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:22,463 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-07-21 19:53:22,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-07-21 19:53:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 19:53:22,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:22,470 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] [2020-07-21 19:53:22,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:22,687 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-07-21 19:53:22,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:22,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252788601] [2020-07-21 19:53:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:22,727 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:53:22,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:22,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:22,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:22,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252788601] [2020-07-21 19:53:22,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:22,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:22,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559077888] [2020-07-21 19:53:22,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:22,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:22,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:22,755 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-07-21 19:53:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:22,807 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-07-21 19:53:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:22,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 19:53:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:22,817 INFO L225 Difference]: With dead ends: 1020 [2020-07-21 19:53:22,818 INFO L226 Difference]: Without dead ends: 586 [2020-07-21 19:53:22,823 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 [2020-07-21 19:53:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-07-21 19:53:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-07-21 19:53:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 19:53:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-07-21 19:53:22,896 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-07-21 19:53:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:22,896 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-07-21 19:53:22,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-07-21 19:53:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 19:53:22,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:22,899 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] [2020-07-21 19:53:23,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:23,114 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-07-21 19:53:23,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:23,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098941062] [2020-07-21 19:53:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:23,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:53:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:23,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:23,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:23,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098941062] [2020-07-21 19:53:23,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:23,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:23,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851762362] [2020-07-21 19:53:23,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:23,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:23,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:23,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:23,187 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-07-21 19:53:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:23,242 INFO L93 Difference]: Finished difference Result 954 states and 1175 transitions. [2020-07-21 19:53:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:23,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 19:53:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:23,254 INFO L225 Difference]: With dead ends: 954 [2020-07-21 19:53:23,255 INFO L226 Difference]: Without dead ends: 952 [2020-07-21 19:53:23,260 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 [2020-07-21 19:53:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-07-21 19:53:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 888. [2020-07-21 19:53:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-07-21 19:53:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1078 transitions. [2020-07-21 19:53:23,312 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1078 transitions. Word has length 21 [2020-07-21 19:53:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:23,312 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1078 transitions. [2020-07-21 19:53:23,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1078 transitions. [2020-07-21 19:53:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 19:53:23,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:53:23,318 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] [2020-07-21 19:53:23,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:23,532 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:53:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:53:23,533 INFO L82 PathProgramCache]: Analyzing trace with hash 960087679, now seen corresponding path program 1 times [2020-07-21 19:53:23,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:53:23,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899567708] [2020-07-21 19:53:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-21 19:53:23,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:53:23,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:53:23,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 19:53:23,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:53:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:53:23,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:53:23,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899567708] [2020-07-21 19:53:23,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:53:23,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 19:53:23,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443504152] [2020-07-21 19:53:23,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 19:53:23,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:53:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 19:53:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 19:53:23,590 INFO L87 Difference]: Start difference. First operand 888 states and 1078 transitions. Second operand 3 states. [2020-07-21 19:53:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:53:23,652 INFO L93 Difference]: Finished difference Result 1976 states and 2358 transitions. [2020-07-21 19:53:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 19:53:23,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 19:53:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:53:23,654 INFO L225 Difference]: With dead ends: 1976 [2020-07-21 19:53:23,655 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:53:23,661 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 [2020-07-21 19:53:23,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:53:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:53:23,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:53:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:53:23,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-07-21 19:53:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:53:23,664 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:53:23,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 19:53:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:53:23,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:53:23,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:53:23,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:53:24,008 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:53:24,009 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:53:24,009 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:53:24,009 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:53:24,010 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:53:24,010 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:53:24,010 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-07-21 19:53:24,013 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-07-21 19:53:24,014 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,014 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-07-21 19:53:24,014 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-07-21 19:53:24,015 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-07-21 19:53:24,015 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,016 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,016 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,017 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-07-21 19:53:24,017 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-07-21 19:53:24,017 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,018 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-07-21 19:53:24,018 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-07-21 19:53:24,018 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-07-21 19:53:24,019 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,019 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-07-21 19:53:24,019 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-07-21 19:53:24,020 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-07-21 19:53:24,020 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-07-21 19:53:24,020 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,021 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,021 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,023 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-07-21 19:53:24,023 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,024 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-07-21 19:53:24,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:53:24 BoogieIcfgContainer [2020-07-21 19:53:24,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:53:24,072 INFO L168 Benchmark]: Toolchain (without parser) took 8189.73 ms. Allocated memory was 134.2 MB in the beginning and 256.4 MB in the end (delta: 122.2 MB). Free memory was 99.1 MB in the beginning and 178.8 MB in the end (delta: -79.7 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:53:24,073 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 134.2 MB. Free memory is still 116.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 19:53:24,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 431.49 ms. Allocated memory is still 134.2 MB. Free memory was 98.7 MB in the beginning and 88.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 19:53:24,083 INFO L168 Benchmark]: Boogie Preprocessor took 207.88 ms. Allocated memory was 134.2 MB in the beginning and 200.3 MB in the end (delta: 66.1 MB). Free memory was 88.6 MB in the beginning and 178.6 MB in the end (delta: -90.0 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-21 19:53:24,084 INFO L168 Benchmark]: RCFGBuilder took 591.03 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 163.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-07-21 19:53:24,085 INFO L168 Benchmark]: TraceAbstraction took 6944.91 ms. Allocated memory was 200.3 MB in the beginning and 256.4 MB in the end (delta: 56.1 MB). Free memory was 162.0 MB in the beginning and 178.8 MB in the end (delta: -16.8 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:53:24,097 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 134.2 MB. Free memory is still 116.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 431.49 ms. Allocated memory is still 134.2 MB. Free memory was 98.7 MB in the beginning and 88.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.88 ms. Allocated memory was 134.2 MB in the beginning and 200.3 MB in the end (delta: 66.1 MB). Free memory was 88.6 MB in the beginning and 178.6 MB in the end (delta: -90.0 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 591.03 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 163.1 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6944.91 ms. Allocated memory was 200.3 MB in the beginning and 256.4 MB in the end (delta: 56.1 MB). Free memory was 162.0 MB in the beginning and 178.8 MB in the end (delta: -16.8 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.6s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 870 SDtfs, 391 SDslu, 579 SDs, 0 SdLazy, 86 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 280 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=888occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 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, 0.4s InterpolantComputationTime, 296 NumberOfCodeBlocks, 248 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 8930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1101 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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...