/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:35:20,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:35:20,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:35:20,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:35:20,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:35:20,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:35:20,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:35:20,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:35:20,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:35:20,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:35:20,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:35:20,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:35:20,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:35:20,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:35:20,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:35:20,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:35:20,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:35:20,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:35:20,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:35:20,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:35:20,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:35:20,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:35:20,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:35:20,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:35:20,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:35:20,841 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 22:35:20,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:35:20,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:35:20,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:35:20,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:35:20,859 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:35:20,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:35:20,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:35:20,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:35:20,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:35:20,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:35:20,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:35:20,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:35:20,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:35:20,861 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:35:20,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:35:20,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:35:20,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:35:20,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:35:20,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:35:20,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:35:20,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:35:20,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:35:20,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:35:20,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:35:20,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:35:20,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:35:20,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:20,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:35:20,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:35:20,864 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:35:21,179 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:35:21,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:35:21,197 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:35:21,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:35:21,199 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:35:21,200 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-07-21 22:35:21,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9213b097/4e8c4018cf124d7bb3e0d5ede4e1fac6/FLAGfebb52683 [2020-07-21 22:35:21,752 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:35:21,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_10.c [2020-07-21 22:35:21,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9213b097/4e8c4018cf124d7bb3e0d5ede4e1fac6/FLAGfebb52683 [2020-07-21 22:35:22,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9213b097/4e8c4018cf124d7bb3e0d5ede4e1fac6 [2020-07-21 22:35:22,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:35:22,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:35:22,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:22,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:35:22,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:35:22,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e89b31c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22, skipping insertion in model container [2020-07-21 22:35:22,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:35:22,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:35:22,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:22,406 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:35:22,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:35:22,449 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:35:22,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22 WrapperNode [2020-07-21 22:35:22,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:35:22,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:35:22,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:35:22,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:35:22,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (1/1) ... [2020-07-21 22:35:22,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:35:22,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:35:22,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:35:22,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:35:22,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (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 22:35:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:35:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:35:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:35:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:35:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:35:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:35:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:35:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:35:22,952 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:35:22,953 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 22:35:22,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:22 BoogieIcfgContainer [2020-07-21 22:35:22,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:35:22,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:35:22,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:35:22,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:35:22,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:35:22" (1/3) ... [2020-07-21 22:35:22,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b49b4fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:22, skipping insertion in model container [2020-07-21 22:35:22,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:35:22" (2/3) ... [2020-07-21 22:35:22,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b49b4fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:35:22, skipping insertion in model container [2020-07-21 22:35:22,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:35:22" (3/3) ... [2020-07-21 22:35:22,973 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-07-21 22:35:22,985 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:35:22,993 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:35:23,016 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:35:23,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:35:23,068 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:35:23,068 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:35:23,068 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:35:23,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:35:23,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:35:23,069 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:35:23,069 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:35:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-07-21 22:35:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:35:23,102 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:23,107 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 22:35:23,108 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:23,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-07-21 22:35:23,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:23,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413455457] [2020-07-21 22:35:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:23,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:23,309 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 22:35:23,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:23,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413455457] [2020-07-21 22:35:23,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:23,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:23,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38903868] [2020-07-21 22:35:23,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:23,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:23,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:23,333 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-07-21 22:35:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:23,398 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-07-21 22:35:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:23,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 22:35:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:23,414 INFO L225 Difference]: With dead ends: 87 [2020-07-21 22:35:23,415 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:35:23,419 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 22:35:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:35:23,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:35:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:35:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-07-21 22:35:23,473 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-07-21 22:35:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:23,474 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-07-21 22:35:23,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-07-21 22:35:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 22:35:23,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:23,477 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 22:35:23,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:23,691 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:23,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-07-21 22:35:23,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:23,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110786997] [2020-07-21 22:35:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:23,755 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:23,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:23,786 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 22:35:23,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:23,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110786997] [2020-07-21 22:35:23,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:23,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:23,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349361907] [2020-07-21 22:35:23,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:23,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:23,794 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-07-21 22:35:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:23,821 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-07-21 22:35:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:23,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 22:35:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:23,824 INFO L225 Difference]: With dead ends: 117 [2020-07-21 22:35:23,824 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:35:23,826 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 22:35:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:35:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-07-21 22:35:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:35:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-07-21 22:35:23,839 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-07-21 22:35:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:23,840 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-07-21 22:35:23,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-07-21 22:35:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 22:35:23,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:23,844 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 22:35:24,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:24,058 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:24,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:24,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-07-21 22:35:24,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:24,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973025145] [2020-07-21 22:35:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:24,129 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:35:24,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:24,149 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 22:35:24,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:24,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973025145] [2020-07-21 22:35:24,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:24,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:24,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269363254] [2020-07-21 22:35:24,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:24,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:24,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:24,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:24,154 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-07-21 22:35:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:24,199 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-07-21 22:35:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:24,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 22:35:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:24,202 INFO L225 Difference]: With dead ends: 108 [2020-07-21 22:35:24,202 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 22:35:24,205 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 22:35:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 22:35:24,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-07-21 22:35:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 22:35:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-07-21 22:35:24,223 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-07-21 22:35:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:24,223 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-07-21 22:35:24,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:24,224 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-07-21 22:35:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 22:35:24,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:24,225 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 22:35:24,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:24,426 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:24,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-07-21 22:35:24,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:24,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677879881] [2020-07-21 22:35:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:35:24,480 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:24,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:24,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:24,496 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 22:35:24,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:24,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677879881] [2020-07-21 22:35:24,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:24,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:24,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003807749] [2020-07-21 22:35:24,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:24,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:24,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:24,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:24,499 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-07-21 22:35:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:24,518 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-07-21 22:35:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:24,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 22:35:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:24,521 INFO L225 Difference]: With dead ends: 136 [2020-07-21 22:35:24,521 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 22:35:24,522 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 22:35:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 22:35:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-07-21 22:35:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 22:35:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-07-21 22:35:24,535 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-07-21 22:35:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:24,535 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-07-21 22:35:24,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-07-21 22:35:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 22:35:24,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:24,537 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 22:35:24,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:24,750 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:24,751 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-07-21 22:35:24,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:24,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803921917] [2020-07-21 22:35:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:24,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:24,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:24,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:24,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:24,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803921917] [2020-07-21 22:35:24,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:24,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:24,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398549462] [2020-07-21 22:35:24,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:24,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:24,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:24,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:24,843 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-07-21 22:35:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:24,875 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-07-21 22:35:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:24,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 22:35:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:24,878 INFO L225 Difference]: With dead ends: 224 [2020-07-21 22:35:24,878 INFO L226 Difference]: Without dead ends: 136 [2020-07-21 22:35:24,879 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 22:35:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-21 22:35:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-07-21 22:35:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 22:35:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-07-21 22:35:24,891 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-07-21 22:35:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:24,892 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-07-21 22:35:24,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-07-21 22:35:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:35:24,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:24,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:25,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:25,108 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-07-21 22:35:25,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:25,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277309441] [2020-07-21 22:35:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:25,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:25,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:25,176 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 22:35:25,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:25,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277309441] [2020-07-21 22:35:25,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:25,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:25,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199507331] [2020-07-21 22:35:25,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:25,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:25,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:25,179 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-07-21 22:35:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:25,199 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-07-21 22:35:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:25,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 22:35:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:25,201 INFO L225 Difference]: With dead ends: 201 [2020-07-21 22:35:25,202 INFO L226 Difference]: Without dead ends: 138 [2020-07-21 22:35:25,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-21 22:35:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-21 22:35:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 22:35:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-07-21 22:35:25,214 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-07-21 22:35:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:25,214 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-07-21 22:35:25,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-07-21 22:35:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:35:25,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:25,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:25,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:25,429 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:25,430 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-07-21 22:35:25,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:25,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481380660] [2020-07-21 22:35:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:25,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:25,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:25,486 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 22:35:25,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:25,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481380660] [2020-07-21 22:35:25,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:25,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:25,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113138899] [2020-07-21 22:35:25,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:25,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:25,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:25,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:25,489 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-07-21 22:35:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:25,510 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-07-21 22:35:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:25,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 22:35:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:25,512 INFO L225 Difference]: With dead ends: 252 [2020-07-21 22:35:25,513 INFO L226 Difference]: Without dead ends: 250 [2020-07-21 22:35:25,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-21 22:35:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-07-21 22:35:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 22:35:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-07-21 22:35:25,533 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-07-21 22:35:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:25,533 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-07-21 22:35:25,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-07-21 22:35:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 22:35:25,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:25,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:25,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:25,750 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-07-21 22:35:25,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:25,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857788258] [2020-07-21 22:35:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:25,793 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:25,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:25,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:25,810 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 22:35:25,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:25,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857788258] [2020-07-21 22:35:25,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:25,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:25,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764388301] [2020-07-21 22:35:25,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:25,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:25,813 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-07-21 22:35:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:25,844 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-07-21 22:35:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:25,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 22:35:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:25,847 INFO L225 Difference]: With dead ends: 432 [2020-07-21 22:35:25,847 INFO L226 Difference]: Without dead ends: 258 [2020-07-21 22:35:25,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-07-21 22:35:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-07-21 22:35:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-07-21 22:35:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-07-21 22:35:25,862 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-07-21 22:35:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:25,863 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-07-21 22:35:25,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-07-21 22:35:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 22:35:25,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:25,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:26,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:26,080 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-07-21 22:35:26,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:26,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267120218] [2020-07-21 22:35:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:26,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:26,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:26,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:26,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:26,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267120218] [2020-07-21 22:35:26,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:26,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:26,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127615054] [2020-07-21 22:35:26,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:26,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:26,140 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-07-21 22:35:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:26,169 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-07-21 22:35:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:26,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 22:35:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:26,172 INFO L225 Difference]: With dead ends: 384 [2020-07-21 22:35:26,172 INFO L226 Difference]: Without dead ends: 262 [2020-07-21 22:35:26,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-07-21 22:35:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-07-21 22:35:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-21 22:35:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-07-21 22:35:26,184 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-07-21 22:35:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:26,185 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-07-21 22:35:26,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-07-21 22:35:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 22:35:26,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:26,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:26,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:26,403 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:26,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:26,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-07-21 22:35:26,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:26,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741934104] [2020-07-21 22:35:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:26,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:26,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:26,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:26,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:26,458 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 22:35:26,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:26,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741934104] [2020-07-21 22:35:26,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:26,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:26,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915301105] [2020-07-21 22:35:26,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:26,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:26,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:26,462 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-07-21 22:35:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:26,491 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-07-21 22:35:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:26,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 22:35:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:26,498 INFO L225 Difference]: With dead ends: 476 [2020-07-21 22:35:26,498 INFO L226 Difference]: Without dead ends: 474 [2020-07-21 22:35:26,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-07-21 22:35:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-07-21 22:35:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-21 22:35:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-07-21 22:35:26,517 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-07-21 22:35:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:26,517 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-07-21 22:35:26,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-07-21 22:35:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 22:35:26,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:26,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:26,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:26,735 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-07-21 22:35:26,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:26,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009678786] [2020-07-21 22:35:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:26,795 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:26,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:26,818 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 22:35:26,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:26,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009678786] [2020-07-21 22:35:26,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:26,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:26,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581159041] [2020-07-21 22:35:26,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:26,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:26,821 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-07-21 22:35:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:26,847 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-07-21 22:35:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:26,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 22:35:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:26,851 INFO L225 Difference]: With dead ends: 844 [2020-07-21 22:35:26,851 INFO L226 Difference]: Without dead ends: 498 [2020-07-21 22:35:26,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-07-21 22:35:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-07-21 22:35:26,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-07-21 22:35:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-07-21 22:35:26,873 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-07-21 22:35:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:26,874 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-07-21 22:35:26,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-07-21 22:35:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:26,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:26,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:27,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:27,090 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:27,090 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-07-21 22:35:27,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:27,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584474140] [2020-07-21 22:35:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:27,133 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:27,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:27,164 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 22:35:27,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:27,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584474140] [2020-07-21 22:35:27,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:27,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:27,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110718814] [2020-07-21 22:35:27,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:27,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:27,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:27,170 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-07-21 22:35:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:27,211 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-07-21 22:35:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:27,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:27,215 INFO L225 Difference]: With dead ends: 744 [2020-07-21 22:35:27,215 INFO L226 Difference]: Without dead ends: 506 [2020-07-21 22:35:27,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-07-21 22:35:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-07-21 22:35:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-07-21 22:35:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-07-21 22:35:27,234 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-07-21 22:35:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:27,234 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-07-21 22:35:27,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-07-21 22:35:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:27,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:27,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:27,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:27,450 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:27,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-07-21 22:35:27,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:27,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041684340] [2020-07-21 22:35:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:27,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:27,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:27,510 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 22:35:27,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:27,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041684340] [2020-07-21 22:35:27,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:27,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:27,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533033665] [2020-07-21 22:35:27,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:27,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:27,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:27,513 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-07-21 22:35:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:27,536 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-07-21 22:35:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:27,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:27,542 INFO L225 Difference]: With dead ends: 908 [2020-07-21 22:35:27,542 INFO L226 Difference]: Without dead ends: 906 [2020-07-21 22:35:27,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-07-21 22:35:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-07-21 22:35:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-07-21 22:35:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-07-21 22:35:27,567 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-07-21 22:35:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:27,567 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-07-21 22:35:27,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-07-21 22:35:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 22:35:27,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:27,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:27,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:27,785 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-07-21 22:35:27,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:27,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974525746] [2020-07-21 22:35:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:27,820 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:27,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:27,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:27,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:27,836 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 22:35:27,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:27,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974525746] [2020-07-21 22:35:27,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:27,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:27,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683454425] [2020-07-21 22:35:27,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:27,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:27,839 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-07-21 22:35:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:27,872 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-07-21 22:35:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:27,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 22:35:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:27,878 INFO L225 Difference]: With dead ends: 1660 [2020-07-21 22:35:27,878 INFO L226 Difference]: Without dead ends: 970 [2020-07-21 22:35:27,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-07-21 22:35:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-07-21 22:35:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-07-21 22:35:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-07-21 22:35:27,917 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-07-21 22:35:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:27,917 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-07-21 22:35:27,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-07-21 22:35:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:35:27,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:27,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:28,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:28,133 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:28,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-07-21 22:35:28,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:28,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772824943] [2020-07-21 22:35:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:28,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:28,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:28,212 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 22:35:28,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:28,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772824943] [2020-07-21 22:35:28,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:28,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:28,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585625229] [2020-07-21 22:35:28,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:28,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:28,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:28,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:28,216 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-07-21 22:35:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:28,249 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-07-21 22:35:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:28,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 22:35:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:28,258 INFO L225 Difference]: With dead ends: 1452 [2020-07-21 22:35:28,258 INFO L226 Difference]: Without dead ends: 986 [2020-07-21 22:35:28,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-07-21 22:35:28,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-07-21 22:35:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-07-21 22:35:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-07-21 22:35:28,307 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-07-21 22:35:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:28,309 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-07-21 22:35:28,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-07-21 22:35:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:35:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:28,313 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:28,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:28,528 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-07-21 22:35:28,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:28,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718142025] [2020-07-21 22:35:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:28,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:28,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:28,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:28,592 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 22:35:28,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:28,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718142025] [2020-07-21 22:35:28,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:28,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:28,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317142633] [2020-07-21 22:35:28,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:28,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:28,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:28,595 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-07-21 22:35:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:28,640 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-07-21 22:35:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:28,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 22:35:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:28,650 INFO L225 Difference]: With dead ends: 1740 [2020-07-21 22:35:28,650 INFO L226 Difference]: Without dead ends: 1738 [2020-07-21 22:35:28,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-07-21 22:35:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-07-21 22:35:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-07-21 22:35:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-07-21 22:35:28,697 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-07-21 22:35:28,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:28,698 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-07-21 22:35:28,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:28,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-07-21 22:35:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 22:35:28,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:28,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:28,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:28,915 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-07-21 22:35:28,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:28,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904733888] [2020-07-21 22:35:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:28,949 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:28,959 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 22:35:28,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:28,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904733888] [2020-07-21 22:35:28,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:28,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:28,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61290822] [2020-07-21 22:35:28,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:28,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:28,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:28,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:28,962 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-07-21 22:35:29,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:29,051 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-07-21 22:35:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:29,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 22:35:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:29,062 INFO L225 Difference]: With dead ends: 3276 [2020-07-21 22:35:29,062 INFO L226 Difference]: Without dead ends: 1898 [2020-07-21 22:35:29,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-07-21 22:35:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-07-21 22:35:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-07-21 22:35:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-07-21 22:35:29,130 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-07-21 22:35:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:29,131 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-07-21 22:35:29,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-07-21 22:35:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:35:29,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:29,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:29,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,350 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:29,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:29,350 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-07-21 22:35:29,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:29,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736377103] [2020-07-21 22:35:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:29,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:29,412 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 22:35:29,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:29,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736377103] [2020-07-21 22:35:29,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:29,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:29,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423251832] [2020-07-21 22:35:29,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:29,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,415 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-07-21 22:35:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:29,469 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-07-21 22:35:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:29,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 22:35:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:29,481 INFO L225 Difference]: With dead ends: 2844 [2020-07-21 22:35:29,481 INFO L226 Difference]: Without dead ends: 1930 [2020-07-21 22:35:29,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 22:35:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-07-21 22:35:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-07-21 22:35:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-07-21 22:35:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-07-21 22:35:29,542 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-07-21 22:35:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:29,543 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-07-21 22:35:29,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-07-21 22:35:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:35:29,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:29,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:29,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,760 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:29,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:29,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-07-21 22:35:29,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:29,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487210041] [2020-07-21 22:35:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:29,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:29,808 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 22:35:29,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:29,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487210041] [2020-07-21 22:35:29,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:29,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:29,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096752695] [2020-07-21 22:35:29,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:29,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:29,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:29,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:29,811 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-07-21 22:35:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:29,863 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-07-21 22:35:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:29,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 22:35:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:29,880 INFO L225 Difference]: With dead ends: 3340 [2020-07-21 22:35:29,880 INFO L226 Difference]: Without dead ends: 3338 [2020-07-21 22:35:29,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 22:35:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-07-21 22:35:29,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-07-21 22:35:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-07-21 22:35:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-07-21 22:35:29,963 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-07-21 22:35:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:29,963 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-07-21 22:35:29,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-07-21 22:35:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:35:29,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:29,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:30,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,186 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:30,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-07-21 22:35:30,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:30,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808970971] [2020-07-21 22:35:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:30,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:30,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:35:30,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:30,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808970971] [2020-07-21 22:35:30,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:30,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:30,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59384329] [2020-07-21 22:35:30,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:30,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:30,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:30,239 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-07-21 22:35:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:30,332 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-07-21 22:35:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:30,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 22:35:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:30,350 INFO L225 Difference]: With dead ends: 6476 [2020-07-21 22:35:30,350 INFO L226 Difference]: Without dead ends: 3722 [2020-07-21 22:35:30,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 22:35:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-07-21 22:35:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-07-21 22:35:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-07-21 22:35:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-07-21 22:35:30,470 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-07-21 22:35:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:30,470 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-07-21 22:35:30,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-07-21 22:35:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:35:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:30,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:30,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,692 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-07-21 22:35:30,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:30,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364537226] [2020-07-21 22:35:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:30,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:30,740 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 22:35:30,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:30,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364537226] [2020-07-21 22:35:30,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:30,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:30,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61606377] [2020-07-21 22:35:30,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:30,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:30,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:30,743 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-07-21 22:35:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:30,819 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-07-21 22:35:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:30,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 22:35:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:30,839 INFO L225 Difference]: With dead ends: 5580 [2020-07-21 22:35:30,840 INFO L226 Difference]: Without dead ends: 3786 [2020-07-21 22:35:30,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 22:35:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-07-21 22:35:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-07-21 22:35:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-07-21 22:35:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-07-21 22:35:30,954 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-07-21 22:35:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:30,954 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-07-21 22:35:30,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-07-21 22:35:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:35:30,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:30,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:31,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:31,175 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-07-21 22:35:31,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:31,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372210475] [2020-07-21 22:35:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:31,241 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:31,254 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 22:35:31,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:31,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372210475] [2020-07-21 22:35:31,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:31,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:31,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020699402] [2020-07-21 22:35:31,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:31,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:31,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:31,259 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-07-21 22:35:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:31,431 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-07-21 22:35:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:31,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 22:35:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:31,502 INFO L225 Difference]: With dead ends: 10956 [2020-07-21 22:35:31,502 INFO L226 Difference]: Without dead ends: 7306 [2020-07-21 22:35:31,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 22:35:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-07-21 22:35:31,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-07-21 22:35:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-21 22:35:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-07-21 22:35:31,810 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-07-21 22:35:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:31,810 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-07-21 22:35:31,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-07-21 22:35:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:35:31,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:31,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:32,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:32,040 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:32,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-07-21 22:35:32,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:32,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107294629] [2020-07-21 22:35:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:32,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:32,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:32,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:32,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:32,086 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 22:35:32,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:32,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107294629] [2020-07-21 22:35:32,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:32,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:32,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986716248] [2020-07-21 22:35:32,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:32,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:32,088 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-07-21 22:35:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:32,203 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-07-21 22:35:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:32,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 22:35:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:32,223 INFO L225 Difference]: With dead ends: 8076 [2020-07-21 22:35:32,223 INFO L226 Difference]: Without dead ends: 8074 [2020-07-21 22:35:32,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 22:35:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-07-21 22:35:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-07-21 22:35:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-07-21 22:35:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-07-21 22:35:32,480 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-07-21 22:35:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:32,480 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-07-21 22:35:32,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-07-21 22:35:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 22:35:32,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:32,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:32,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:32,704 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-07-21 22:35:32,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:32,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64823921] [2020-07-21 22:35:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:32,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:32,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:32,749 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 22:35:32,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:32,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64823921] [2020-07-21 22:35:32,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:32,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:32,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510322592] [2020-07-21 22:35:32,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:32,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:32,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:32,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:32,752 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-07-21 22:35:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:32,919 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-07-21 22:35:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:32,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 22:35:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:32,956 INFO L225 Difference]: With dead ends: 12172 [2020-07-21 22:35:32,957 INFO L226 Difference]: Without dead ends: 12170 [2020-07-21 22:35:32,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 22:35:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-07-21 22:35:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-07-21 22:35:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-07-21 22:35:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-07-21 22:35:33,265 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-07-21 22:35:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:33,266 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-07-21 22:35:33,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-07-21 22:35:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 22:35:33,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:33,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:33,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:33,506 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-07-21 22:35:33,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:33,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939551134] [2020-07-21 22:35:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:33,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:33,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:33,555 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 22:35:33,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:33,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939551134] [2020-07-21 22:35:33,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:33,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:33,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446047597] [2020-07-21 22:35:33,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:33,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:33,558 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-07-21 22:35:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:33,866 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-07-21 22:35:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:33,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 22:35:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:33,914 INFO L225 Difference]: With dead ends: 25228 [2020-07-21 22:35:33,915 INFO L226 Difference]: Without dead ends: 14218 [2020-07-21 22:35:33,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 22:35:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-07-21 22:35:34,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-07-21 22:35:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-07-21 22:35:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-07-21 22:35:34,419 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-07-21 22:35:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:34,420 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-07-21 22:35:34,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-07-21 22:35:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 22:35:34,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:34,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:34,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:34,654 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-07-21 22:35:34,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:34,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780924072] [2020-07-21 22:35:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:34,692 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:34,701 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 22:35:34,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:34,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780924072] [2020-07-21 22:35:34,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:34,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:34,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108350662] [2020-07-21 22:35:34,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:34,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:34,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:34,704 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-07-21 22:35:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:34,851 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-07-21 22:35:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:34,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 22:35:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:34,886 INFO L225 Difference]: With dead ends: 21516 [2020-07-21 22:35:34,887 INFO L226 Difference]: Without dead ends: 14602 [2020-07-21 22:35:34,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 22:35:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-07-21 22:35:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-07-21 22:35:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-07-21 22:35:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-07-21 22:35:35,194 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-07-21 22:35:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:35,195 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-07-21 22:35:35,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-07-21 22:35:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 22:35:35,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:35,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:35,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:35,431 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-07-21 22:35:35,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:35,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544339359] [2020-07-21 22:35:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:35,467 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:35,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:35,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:35,475 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 22:35:35,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:35,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544339359] [2020-07-21 22:35:35,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:35,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:35,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273551001] [2020-07-21 22:35:35,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:35,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:35,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:35,477 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-07-21 22:35:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:36,098 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-07-21 22:35:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:36,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 22:35:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:36,142 INFO L225 Difference]: With dead ends: 23562 [2020-07-21 22:35:36,142 INFO L226 Difference]: Without dead ends: 23560 [2020-07-21 22:35:36,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 22:35:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-07-21 22:35:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-07-21 22:35:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-07-21 22:35:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-07-21 22:35:36,660 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-07-21 22:35:36,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:36,660 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-07-21 22:35:36,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-07-21 22:35:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 22:35:36,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:35:36,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:35:36,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:36,914 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:35:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:35:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-07-21 22:35:36,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:35:36,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88445410] [2020-07-21 22:35:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:36,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:35:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:35:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 22:35:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:35:36,955 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 22:35:36,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:35:36,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88445410] [2020-07-21 22:35:36,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:35:36,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 22:35:36,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616527450] [2020-07-21 22:35:36,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 22:35:36,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:35:36,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 22:35:36,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 22:35:36,957 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-07-21 22:35:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:35:37,209 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-07-21 22:35:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 22:35:37,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-07-21 22:35:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:35:37,210 INFO L225 Difference]: With dead ends: 50184 [2020-07-21 22:35:37,210 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:35:37,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 22:35:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:35:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:35:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:35:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:35:37,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-21 22:35:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:35:37,277 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:35:37,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 22:35:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:35:37,277 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:35:37,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:35:37,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:35:37,549 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 22:35:37,549 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:35:37,550 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 22:35:37,550 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 22:35:37,550 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 22:35:37,550 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 22:35:37,550 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-07-21 22:35:37,550 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-07-21 22:35:37,550 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,550 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,551 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-07-21 22:35:37,552 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-07-21 22:35:37,552 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-07-21 22:35:37,552 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-07-21 22:35:37,552 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-07-21 22:35:37,552 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-07-21 22:35:37,552 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-07-21 22:35:37,552 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,552 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,553 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-07-21 22:35:37,554 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-07-21 22:35:37,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:35:37 BoogieIcfgContainer [2020-07-21 22:35:37,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 22:35:37,571 INFO L168 Benchmark]: Toolchain (without parser) took 15466.34 ms. Allocated memory was 136.3 MB in the beginning and 589.3 MB in the end (delta: 453.0 MB). Free memory was 99.9 MB in the beginning and 263.1 MB in the end (delta: -163.3 MB). Peak memory consumption was 289.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:37,572 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 22:35:37,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.93 ms. Allocated memory is still 136.3 MB. Free memory was 99.5 MB in the beginning and 88.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:37,573 INFO L168 Benchmark]: Boogie Preprocessor took 130.86 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 88.8 MB in the beginning and 177.9 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:37,579 INFO L168 Benchmark]: RCFGBuilder took 377.87 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 158.4 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:37,579 INFO L168 Benchmark]: TraceAbstraction took 14605.41 ms. Allocated memory was 199.8 MB in the beginning and 589.3 MB in the end (delta: 389.5 MB). Free memory was 157.7 MB in the beginning and 263.1 MB in the end (delta: -105.5 MB). Peak memory consumption was 284.1 MB. Max. memory is 7.1 GB. [2020-07-21 22:35:37,582 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.3 MB. Free memory was 118.1 MB in the beginning and 117.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.93 ms. Allocated memory is still 136.3 MB. Free memory was 99.5 MB in the beginning and 88.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.86 ms. Allocated memory was 136.3 MB in the beginning and 199.8 MB in the end (delta: 63.4 MB). Free memory was 88.8 MB in the beginning and 177.9 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 377.87 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 158.4 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14605.41 ms. Allocated memory was 199.8 MB in the beginning and 589.3 MB in the end (delta: 389.5 MB). Free memory was 157.7 MB in the beginning and 263.1 MB in the end (delta: -105.5 MB). Peak memory consumption was 284.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.4s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 659 GetRequests, 631 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 687 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 3125 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...