/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/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:46:25,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:46:25,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:46:25,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:46:25,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:46:25,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:46:25,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:46:25,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:46:25,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:46:25,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:46:25,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:46:25,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:46:25,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:46:25,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:46:25,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:46:25,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:46:25,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:46:25,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:46:25,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:46:25,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:46:25,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:46:25,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:46:25,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:46:25,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:46:25,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:46:25,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:46:25,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:46:25,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:46:25,884 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 01:46:25,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:46:25,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:46:25,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:46:25,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:46:25,901 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:46:25,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:46:25,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:46:25,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:46:25,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:46:25,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:46:25,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:46:25,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:46:25,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:46:25,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:46:25,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:46:25,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:46:25,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:46:25,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:46:25,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:46:25,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:46:25,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:46:25,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:46:25,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:46:25,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:46:25,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:46:25,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:46:25,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:25,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:46:25,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:46:25,906 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 01:46:26,207 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:46:26,223 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:46:26,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:46:26,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:46:26,230 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:46:26,231 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-21 01:46:26,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6186fbdf/6938d6bcc08c468aa481c98ed4cf8f4a/FLAG354e58a12 [2020-07-21 01:46:26,846 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:46:26,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-21 01:46:26,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6186fbdf/6938d6bcc08c468aa481c98ed4cf8f4a/FLAG354e58a12 [2020-07-21 01:46:27,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6186fbdf/6938d6bcc08c468aa481c98ed4cf8f4a [2020-07-21 01:46:27,225 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:46:27,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:46:27,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:46:27,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:46:27,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:46:27,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1fc31c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27, skipping insertion in model container [2020-07-21 01:46:27,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:46:27,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:46:27,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:46:27,557 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:46:27,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:46:27,613 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:46:27,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27 WrapperNode [2020-07-21 01:46:27,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:46:27,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:46:27,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:46:27,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:46:27,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (1/1) ... [2020-07-21 01:46:27,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:46:27,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:46:27,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:46:27,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:46:27,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (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 01:46:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:46:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:46:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:46:27,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:46:27,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:46:27,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:46:27,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:46:28,234 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:46:28,234 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 01:46:28,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:46:28 BoogieIcfgContainer [2020-07-21 01:46:28,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:46:28,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:46:28,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:46:28,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:46:28,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:46:27" (1/3) ... [2020-07-21 01:46:28,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4821ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:46:28, skipping insertion in model container [2020-07-21 01:46:28,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:46:27" (2/3) ... [2020-07-21 01:46:28,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4821ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:46:28, skipping insertion in model container [2020-07-21 01:46:28,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:46:28" (3/3) ... [2020-07-21 01:46:28,257 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i.v+cfa-reducer.c [2020-07-21 01:46:28,269 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:46:28,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-07-21 01:46:28,293 INFO L251 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-07-21 01:46:28,331 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:46:28,331 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:46:28,331 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:46:28,331 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:46:28,332 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:46:28,332 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:46:28,332 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:46:28,332 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:46:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-21 01:46:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 01:46:28,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:28,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:28,367 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1781845407, now seen corresponding path program 1 times [2020-07-21 01:46:28,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:28,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313108709] [2020-07-21 01:46:28,386 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 01:46:28,476 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:46:28,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:28,533 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:28,541 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:28,574 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 01:46:28,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:28,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313108709] [2020-07-21 01:46:28,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:28,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:46:28,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17956332] [2020-07-21 01:46:28,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:46:28,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:28,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:46:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:46:28,610 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-07-21 01:46:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:28,647 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2020-07-21 01:46:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:46:28,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 01:46:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:28,662 INFO L225 Difference]: With dead ends: 88 [2020-07-21 01:46:28,662 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 01:46:28,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 01:46:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 01:46:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2020-07-21 01:46:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 01:46:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-07-21 01:46:28,716 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 13 [2020-07-21 01:46:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:28,716 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-07-21 01:46:28,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:46:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-07-21 01:46:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:46:28,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:28,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:28,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:28,920 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -594195383, now seen corresponding path program 1 times [2020-07-21 01:46:28,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:28,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105043669] [2020-07-21 01:46:28,922 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 01:46:28,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:28,990 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:28,993 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:29,005 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 01:46:29,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:29,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105043669] [2020-07-21 01:46:29,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:29,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:29,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544828606] [2020-07-21 01:46:29,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:29,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:29,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:29,010 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 4 states. [2020-07-21 01:46:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:29,119 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2020-07-21 01:46:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:29,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 01:46:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:29,121 INFO L225 Difference]: With dead ends: 153 [2020-07-21 01:46:29,122 INFO L226 Difference]: Without dead ends: 101 [2020-07-21 01:46:29,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-21 01:46:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2020-07-21 01:46:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 01:46:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-07-21 01:46:29,139 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 14 [2020-07-21 01:46:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:29,140 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-07-21 01:46:29,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-07-21 01:46:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:46:29,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:29,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:29,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:29,357 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -597364152, now seen corresponding path program 1 times [2020-07-21 01:46:29,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:29,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747156310] [2020-07-21 01:46:29,358 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 01:46:29,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:29,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:29,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:29,418 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:29,421 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:29,430 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 01:46:29,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:29,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747156310] [2020-07-21 01:46:29,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:29,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:29,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852952403] [2020-07-21 01:46:29,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:29,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:29,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:29,434 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2020-07-21 01:46:29,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:29,517 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-07-21 01:46:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:46:29,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 01:46:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:29,520 INFO L225 Difference]: With dead ends: 75 [2020-07-21 01:46:29,520 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 01:46:29,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 01:46:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2020-07-21 01:46:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 01:46:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-07-21 01:46:29,530 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 14 [2020-07-21 01:46:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:29,530 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-07-21 01:46:29,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-21 01:46:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 01:46:29,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:29,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:29,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:29,746 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1240184593, now seen corresponding path program 1 times [2020-07-21 01:46:29,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:29,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521280991] [2020-07-21 01:46:29,749 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 01:46:29,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:29,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:29,808 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:29,810 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:29,816 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 01:46:29,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:29,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521280991] [2020-07-21 01:46:29,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:29,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:29,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185494679] [2020-07-21 01:46:29,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:29,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:29,819 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-07-21 01:46:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:29,903 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-07-21 01:46:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:46:29,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-21 01:46:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:29,905 INFO L225 Difference]: With dead ends: 96 [2020-07-21 01:46:29,906 INFO L226 Difference]: Without dead ends: 94 [2020-07-21 01:46:29,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:29,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-21 01:46:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2020-07-21 01:46:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 01:46:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-07-21 01:46:29,914 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 15 [2020-07-21 01:46:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:29,915 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-07-21 01:46:29,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-07-21 01:46:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:46:29,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:29,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:30,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:30,132 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash 208986383, now seen corresponding path program 1 times [2020-07-21 01:46:30,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:30,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504170699] [2020-07-21 01:46:30,135 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 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 01:46:30,168 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:30,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:46:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:30,207 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:30,211 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:30,225 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 01:46:30,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:30,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504170699] [2020-07-21 01:46:30,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:30,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:30,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142716860] [2020-07-21 01:46:30,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:30,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:30,229 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 5 states. [2020-07-21 01:46:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:30,327 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-07-21 01:46:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:46:30,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 01:46:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:30,330 INFO L225 Difference]: With dead ends: 95 [2020-07-21 01:46:30,330 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 01:46:30,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:46:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 01:46:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 52. [2020-07-21 01:46:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 01:46:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-07-21 01:46:30,338 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 16 [2020-07-21 01:46:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:30,339 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-07-21 01:46:30,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-07-21 01:46:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:46:30,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:30,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:30,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:30,556 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:30,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:30,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1458792136, now seen corresponding path program 1 times [2020-07-21 01:46:30,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:30,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23998439] [2020-07-21 01:46:30,559 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 01:46:30,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:30,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:30,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:30,610 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:30,624 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 01:46:30,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23998439] [2020-07-21 01:46:30,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:30,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:30,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540565850] [2020-07-21 01:46:30,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:30,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:30,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:30,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:30,627 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 4 states. [2020-07-21 01:46:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:30,705 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-07-21 01:46:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:30,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 01:46:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:30,707 INFO L225 Difference]: With dead ends: 69 [2020-07-21 01:46:30,707 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 01:46:30,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 01:46:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 01:46:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 01:46:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-07-21 01:46:30,714 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 16 [2020-07-21 01:46:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:30,715 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-07-21 01:46:30,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-07-21 01:46:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:46:30,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:30,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:30,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:30,930 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:30,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:30,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2111353611, now seen corresponding path program 1 times [2020-07-21 01:46:30,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:30,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893430301] [2020-07-21 01:46:30,932 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 01:46:30,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:30,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:30,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:30,995 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:31,002 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 01:46:31,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:31,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893430301] [2020-07-21 01:46:31,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:31,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:31,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308365933] [2020-07-21 01:46:31,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:31,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:31,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:31,006 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-07-21 01:46:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:31,083 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-07-21 01:46:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:46:31,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-21 01:46:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:31,085 INFO L225 Difference]: With dead ends: 91 [2020-07-21 01:46:31,085 INFO L226 Difference]: Without dead ends: 89 [2020-07-21 01:46:31,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-21 01:46:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 48. [2020-07-21 01:46:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 01:46:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-21 01:46:31,105 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 17 [2020-07-21 01:46:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:31,105 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-21 01:46:31,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-21 01:46:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 01:46:31,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:31,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:31,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:31,322 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:31,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:31,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2022080917, now seen corresponding path program 1 times [2020-07-21 01:46:31,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:31,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651772316] [2020-07-21 01:46:31,323 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 01:46:31,354 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:31,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:46:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:31,374 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:31,385 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 01:46:31,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:31,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651772316] [2020-07-21 01:46:31,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:31,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:31,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792508200] [2020-07-21 01:46:31,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:31,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:31,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:31,389 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2020-07-21 01:46:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:31,464 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-21 01:46:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:46:31,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-21 01:46:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:31,466 INFO L225 Difference]: With dead ends: 62 [2020-07-21 01:46:31,466 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 01:46:31,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 01:46:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-07-21 01:46:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 01:46:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-21 01:46:31,482 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 17 [2020-07-21 01:46:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:31,483 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-21 01:46:31,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-21 01:46:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:46:31,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:31,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:31,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:31,688 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:31,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1740004142, now seen corresponding path program 1 times [2020-07-21 01:46:31,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:31,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984543921] [2020-07-21 01:46:31,691 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 01:46:31,726 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:31,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:46:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:31,753 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:31,764 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 01:46:31,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:31,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984543921] [2020-07-21 01:46:31,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:31,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:31,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401353597] [2020-07-21 01:46:31,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:31,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:31,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:31,767 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2020-07-21 01:46:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:31,875 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-21 01:46:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:46:31,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-21 01:46:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:31,878 INFO L225 Difference]: With dead ends: 61 [2020-07-21 01:46:31,879 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 01:46:31,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:46:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 01:46:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2020-07-21 01:46:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 01:46:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-21 01:46:31,891 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 18 [2020-07-21 01:46:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:31,894 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-21 01:46:31,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-21 01:46:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:46:31,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:31,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:46:32,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:32,112 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1894443311, now seen corresponding path program 1 times [2020-07-21 01:46:32,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:32,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114659148] [2020-07-21 01:46:32,114 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 01:46:32,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:32,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:32,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 01:46:32,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:32,165 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:32,179 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 01:46:32,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:32,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114659148] [2020-07-21 01:46:32,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:32,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:32,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134060368] [2020-07-21 01:46:32,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:32,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:32,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:32,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:32,182 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 4 states. [2020-07-21 01:46:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:32,225 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-21 01:46:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:46:32,225 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-21 01:46:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:32,226 INFO L225 Difference]: With dead ends: 61 [2020-07-21 01:46:32,227 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 01:46:32,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 01:46:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-07-21 01:46:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 01:46:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-07-21 01:46:32,232 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 19 [2020-07-21 01:46:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:32,232 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-07-21 01:46:32,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:32,233 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-07-21 01:46:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 01:46:32,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:32,234 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 01:46:32,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:32,445 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1401802644, now seen corresponding path program 1 times [2020-07-21 01:46:32,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:32,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979221370] [2020-07-21 01:46:32,446 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 01:46:32,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:32,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:46:32,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:32,525 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:32,543 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 01:46:32,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:32,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979221370] [2020-07-21 01:46:32,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:32,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:46:32,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705113230] [2020-07-21 01:46:32,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:46:32,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:32,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:46:32,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:46:32,546 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2020-07-21 01:46:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:32,636 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-07-21 01:46:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:32,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-21 01:46:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:32,638 INFO L225 Difference]: With dead ends: 69 [2020-07-21 01:46:32,638 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 01:46:32,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 01:46:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2020-07-21 01:46:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 01:46:32,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-21 01:46:32,651 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 20 [2020-07-21 01:46:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:32,651 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-21 01:46:32,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:46:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-21 01:46:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:46:32,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:32,652 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 01:46:32,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:32,855 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:32,856 INFO L82 PathProgramCache]: Analyzing trace with hash 506212151, now seen corresponding path program 1 times [2020-07-21 01:46:32,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:32,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495581055] [2020-07-21 01:46:32,857 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 01:46:32,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:32,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:46:32,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:32,937 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:32,940 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:32,947 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 01:46:32,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:32,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495581055] [2020-07-21 01:46:32,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:32,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:32,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203210897] [2020-07-21 01:46:32,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:32,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:32,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:32,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:32,949 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-07-21 01:46:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:33,055 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-07-21 01:46:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:46:33,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-21 01:46:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:33,057 INFO L225 Difference]: With dead ends: 74 [2020-07-21 01:46:33,057 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 01:46:33,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 01:46:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2020-07-21 01:46:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 01:46:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-07-21 01:46:33,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 21 [2020-07-21 01:46:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:33,063 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-07-21 01:46:33,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-07-21 01:46:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:46:33,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:33,064 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 01:46:33,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:33,265 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:33,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1487289350, now seen corresponding path program 1 times [2020-07-21 01:46:33,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:33,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583014046] [2020-07-21 01:46:33,267 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 01:46:33,307 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:33,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:33,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:46:33,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:33,331 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:33,341 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 01:46:33,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:33,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583014046] [2020-07-21 01:46:33,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:33,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:46:33,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077884949] [2020-07-21 01:46:33,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:46:33,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:33,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:46:33,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:33,344 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2020-07-21 01:46:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:33,483 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-07-21 01:46:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:46:33,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-07-21 01:46:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:33,484 INFO L225 Difference]: With dead ends: 62 [2020-07-21 01:46:33,484 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 01:46:33,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:46:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 01:46:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-07-21 01:46:33,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 01:46:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-07-21 01:46:33,490 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2020-07-21 01:46:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:33,490 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-07-21 01:46:33,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:46:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-21 01:46:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 01:46:33,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:33,491 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] [2020-07-21 01:46:33,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:33,698 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1138673565, now seen corresponding path program 1 times [2020-07-21 01:46:33,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:33,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527965607] [2020-07-21 01:46:33,700 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 01:46:33,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:33,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:46:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:33,763 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:33,776 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 01:46:33,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:33,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527965607] [2020-07-21 01:46:33,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:33,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:46:33,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099469466] [2020-07-21 01:46:33,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:46:33,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:46:33,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:46:33,779 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2020-07-21 01:46:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:33,909 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2020-07-21 01:46:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:46:33,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-07-21 01:46:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:33,910 INFO L225 Difference]: With dead ends: 87 [2020-07-21 01:46:33,910 INFO L226 Difference]: Without dead ends: 85 [2020-07-21 01:46:33,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:46:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-21 01:46:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 34. [2020-07-21 01:46:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 01:46:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-21 01:46:33,921 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2020-07-21 01:46:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:33,922 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-21 01:46:33,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:46:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-21 01:46:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:46:33,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:33,923 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 01:46:34,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:34,124 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:34,124 INFO L82 PathProgramCache]: Analyzing trace with hash 939145312, now seen corresponding path program 1 times [2020-07-21 01:46:34,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:34,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876388771] [2020-07-21 01:46:34,125 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 01:46:34,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:34,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:34,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:46:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:34,183 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:34,200 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 01:46:34,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:34,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876388771] [2020-07-21 01:46:34,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:34,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:46:34,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342233345] [2020-07-21 01:46:34,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:46:34,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:46:34,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:34,203 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-07-21 01:46:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:34,328 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-07-21 01:46:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:46:34,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-07-21 01:46:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:34,329 INFO L225 Difference]: With dead ends: 60 [2020-07-21 01:46:34,329 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 01:46:34,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-07-21 01:46:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 01:46:34,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 32. [2020-07-21 01:46:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 01:46:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-07-21 01:46:34,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2020-07-21 01:46:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:34,337 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-07-21 01:46:34,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:46:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-07-21 01:46:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:46:34,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:46:34,338 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 01:46:34,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:34,552 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr15ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr13ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr14ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:46:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:46:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash -951263229, now seen corresponding path program 1 times [2020-07-21 01:46:34,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:46:34,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599352834] [2020-07-21 01:46:34,554 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 01:46:34,596 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:46:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:46:34,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:46:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:46:34,620 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:46:34,629 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 01:46:34,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:46:34,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599352834] [2020-07-21 01:46:34,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:46:34,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:46:34,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992618828] [2020-07-21 01:46:34,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:46:34,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:46:34,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:46:34,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:46:34,632 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-07-21 01:46:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:46:34,798 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2020-07-21 01:46:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:46:34,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-21 01:46:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:46:34,799 INFO L225 Difference]: With dead ends: 125 [2020-07-21 01:46:34,799 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 01:46:34,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:46:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 01:46:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 01:46:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 01:46:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 01:46:34,801 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-21 01:46:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:46:34,801 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 01:46:34,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:46:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 01:46:34,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 01:46:35,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:46:35,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 01:46:35,387 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 64 [2020-07-21 01:46:35,786 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2020-07-21 01:46:35,936 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 17 [2020-07-21 01:46:36,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:46:36,022 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:46:36,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:46:36,022 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 01:46:36,023 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 01:46:36,023 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 01:46:36,023 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 01:46:36,023 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-21 01:46:36,023 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 01:46:36,023 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-21 01:46:36,023 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 01:46:36,024 INFO L268 CegarLoopResult]: For program point L225(lines 225 267) no Hoare annotation was computed. [2020-07-21 01:46:36,024 INFO L268 CegarLoopResult]: For program point mainErr3ASSERT_VIOLATIONERROR_FUNCTION(line 86) no Hoare annotation was computed. [2020-07-21 01:46:36,024 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 311) no Hoare annotation was computed. [2020-07-21 01:46:36,024 INFO L268 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-07-21 01:46:36,024 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-07-21 01:46:36,024 INFO L268 CegarLoopResult]: For program point mainErr11ASSERT_VIOLATIONERROR_FUNCTION(line 203) no Hoare annotation was computed. [2020-07-21 01:46:36,024 INFO L268 CegarLoopResult]: For program point L201(lines 201 271) no Hoare annotation was computed. [2020-07-21 01:46:36,025 INFO L268 CegarLoopResult]: For program point L36(lines 36 292) no Hoare annotation was computed. [2020-07-21 01:46:36,025 INFO L268 CegarLoopResult]: For program point mainErr6ASSERT_VIOLATIONERROR_FUNCTION(line 139) no Hoare annotation was computed. [2020-07-21 01:46:36,025 INFO L268 CegarLoopResult]: For program point L86(line 86) no Hoare annotation was computed. [2020-07-21 01:46:36,025 INFO L268 CegarLoopResult]: For program point L243(line 243) no Hoare annotation was computed. [2020-07-21 01:46:36,025 INFO L268 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-07-21 01:46:36,025 INFO L268 CegarLoopResult]: For program point mainErr14ASSERT_VIOLATIONERROR_FUNCTION(line 243) no Hoare annotation was computed. [2020-07-21 01:46:36,025 INFO L268 CegarLoopResult]: For program point L227(line 227) no Hoare annotation was computed. [2020-07-21 01:46:36,026 INFO L268 CegarLoopResult]: For program point L161(lines 161 277) no Hoare annotation was computed. [2020-07-21 01:46:36,026 INFO L268 CegarLoopResult]: For program point mainErr5ASSERT_VIOLATIONERROR_FUNCTION(line 110) no Hoare annotation was computed. [2020-07-21 01:46:36,026 INFO L264 CegarLoopResult]: At program point L302(lines 23 310) the Hoare annotation is: (and (<= (+ main_~main__limit~0 4) main_~main__bufsize~0) (<= 0 main_~main__i~0)) [2020-07-21 01:46:36,026 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 311) no Hoare annotation was computed. [2020-07-21 01:46:36,026 INFO L268 CegarLoopResult]: For program point L203(line 203) no Hoare annotation was computed. [2020-07-21 01:46:36,026 INFO L268 CegarLoopResult]: For program point mainErr13ASSERT_VIOLATIONERROR_FUNCTION(line 227) no Hoare annotation was computed. [2020-07-21 01:46:36,027 INFO L268 CegarLoopResult]: For program point L137(lines 137 281) no Hoare annotation was computed. [2020-07-21 01:46:36,027 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2020-07-21 01:46:36,027 INFO L268 CegarLoopResult]: For program point L96(lines 96 123) no Hoare annotation was computed. [2020-07-21 01:46:36,027 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 311) the Hoare annotation is: true [2020-07-21 01:46:36,027 INFO L268 CegarLoopResult]: For program point L253(lines 253 263) no Hoare annotation was computed. [2020-07-21 01:46:36,027 INFO L268 CegarLoopResult]: For program point L55(lines 55 284) no Hoare annotation was computed. [2020-07-21 01:46:36,027 INFO L268 CegarLoopResult]: For program point mainErr8ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2020-07-21 01:46:36,027 INFO L268 CegarLoopResult]: For program point L72(lines 72 127) no Hoare annotation was computed. [2020-07-21 01:46:36,028 INFO L264 CegarLoopResult]: At program point L262(lines 29 304) the Hoare annotation is: (let ((.cse1 (<= (+ main_~main__j~0 4) main_~main__bufsize~0)) (.cse3 (<= (+ main_~main__limit~0 4) main_~main__bufsize~0))) (let ((.cse0 (let ((.cse4 (<= 1 main_~main__i~0))) (or (and .cse3 .cse1 .cse4) (and .cse3 .cse4 (<= 1 main_~__VERIFIER_assert__cond~12))))) (.cse2 (<= 1 main_~main__j~0))) (or (and .cse0 .cse1 .cse2) (and .cse0 (<= 1 main_~__VERIFIER_assert__cond~14) .cse2) (and (< main_~main__i~0 main_~main__len~0) (<= 0 main_~main__j~0) .cse3 (<= 0 main_~main__i~0))))) [2020-07-21 01:46:36,028 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-07-21 01:46:36,028 INFO L268 CegarLoopResult]: For program point L64(lines 64 283) no Hoare annotation was computed. [2020-07-21 01:46:36,028 INFO L268 CegarLoopResult]: For program point mainErr7ASSERT_VIOLATIONERROR_FUNCTION(line 151) no Hoare annotation was computed. [2020-07-21 01:46:36,028 INFO L268 CegarLoopResult]: For program point L213(lines 213 269) no Hoare annotation was computed. [2020-07-21 01:46:36,030 INFO L268 CegarLoopResult]: For program point mainErr15ASSERT_VIOLATIONERROR_FUNCTION(line 255) no Hoare annotation was computed. [2020-07-21 01:46:36,030 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-07-21 01:46:36,030 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-07-21 01:46:36,030 INFO L268 CegarLoopResult]: For program point mainErr2ASSERT_VIOLATIONERROR_FUNCTION(line 74) no Hoare annotation was computed. [2020-07-21 01:46:36,030 INFO L268 CegarLoopResult]: For program point L255(line 255) no Hoare annotation was computed. [2020-07-21 01:46:36,030 INFO L268 CegarLoopResult]: For program point L189(lines 189 273) no Hoare annotation was computed. [2020-07-21 01:46:36,031 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-21 01:46:36,031 INFO L268 CegarLoopResult]: For program point L173(lines 173 275) no Hoare annotation was computed. [2020-07-21 01:46:36,031 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-07-21 01:46:36,031 INFO L268 CegarLoopResult]: For program point mainErr10ASSERT_VIOLATIONERROR_FUNCTION(line 191) no Hoare annotation was computed. [2020-07-21 01:46:36,031 INFO L268 CegarLoopResult]: For program point mainErr1ASSERT_VIOLATIONERROR_FUNCTION(line 57) no Hoare annotation was computed. [2020-07-21 01:46:36,031 INFO L268 CegarLoopResult]: For program point L215(line 215) no Hoare annotation was computed. [2020-07-21 01:46:36,031 INFO L268 CegarLoopResult]: For program point L149(lines 149 279) no Hoare annotation was computed. [2020-07-21 01:46:36,032 INFO L268 CegarLoopResult]: For program point mainErr9ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point L108(lines 108 121) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point L34(lines 34 298) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point L191(line 191) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point mainErr4ASSERT_VIOLATIONERROR_FUNCTION(line 98) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point L84(lines 84 125) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point L18(lines 18 310) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point mainErr12ASSERT_VIOLATIONERROR_FUNCTION(line 215) no Hoare annotation was computed. [2020-07-21 01:46:36,033 INFO L268 CegarLoopResult]: For program point L241(lines 241 265) no Hoare annotation was computed. [2020-07-21 01:46:36,034 INFO L268 CegarLoopResult]: For program point L175(line 175) no Hoare annotation was computed. [2020-07-21 01:46:36,034 INFO L268 CegarLoopResult]: For program point L43(lines 43 286) no Hoare annotation was computed. [2020-07-21 01:46:36,034 INFO L264 CegarLoopResult]: At program point L291(lines 36 292) the Hoare annotation is: (and (< main_~main__i~0 main_~main__len~0) (<= 0 main_~main__j~0) (<= (+ main_~main__limit~0 4) main_~main__bufsize~0) (<= 0 main_~main__i~0) (<= (+ main_~main__j~0 5) main_~main__bufsize~0)) [2020-07-21 01:46:36,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:46:36 BoogieIcfgContainer [2020-07-21 01:46:36,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:46:36,075 INFO L168 Benchmark]: Toolchain (without parser) took 8848.34 ms. Allocated memory was 137.9 MB in the beginning and 277.3 MB in the end (delta: 139.5 MB). Free memory was 102.2 MB in the beginning and 156.7 MB in the end (delta: -54.5 MB). Peak memory consumption was 119.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:36,078 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 01:46:36,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.37 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 89.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:36,080 INFO L168 Benchmark]: Boogie Preprocessor took 143.61 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 89.6 MB in the beginning and 179.7 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:36,080 INFO L168 Benchmark]: RCFGBuilder took 480.15 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 157.3 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:36,081 INFO L168 Benchmark]: TraceAbstraction took 7821.03 ms. Allocated memory was 202.4 MB in the beginning and 277.3 MB in the end (delta: 75.0 MB). Free memory was 156.6 MB in the beginning and 156.7 MB in the end (delta: -55.0 kB). Peak memory consumption was 109.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:46:36,084 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 384.37 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 89.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.61 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 89.6 MB in the beginning and 179.7 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 480.15 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 157.3 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7821.03 ms. Allocated memory was 202.4 MB in the beginning and 277.3 MB in the end (delta: 75.0 MB). Free memory was 156.6 MB in the beginning and 156.7 MB in the end (delta: -55.0 kB). Peak memory consumption was 109.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 255]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 151]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 163]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 227]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 191]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 243]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 215]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 98]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 203]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 74]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 139]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 110]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 86]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 57]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((((((main__limit + 4 <= main__bufsize && main__j + 4 <= main__bufsize) && 1 <= main__i) || ((main__limit + 4 <= main__bufsize && 1 <= main__i) && 1 <= __VERIFIER_assert__cond)) && main__j + 4 <= main__bufsize) && 1 <= main__j) || (((((main__limit + 4 <= main__bufsize && main__j + 4 <= main__bufsize) && 1 <= main__i) || ((main__limit + 4 <= main__bufsize && 1 <= main__i) && 1 <= __VERIFIER_assert__cond)) && 1 <= __VERIFIER_assert__cond) && 1 <= main__j)) || (((main__i < main__len && 0 <= main__j) && main__limit + 4 <= main__bufsize) && 0 <= main__i) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((main__i < main__len && 0 <= main__j) && main__limit + 4 <= main__bufsize) && 0 <= main__i) && main__j + 5 <= main__bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: main__limit + 4 <= main__bufsize && 0 <= main__i - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.6s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 934 SDtfs, 1202 SDslu, 822 SDs, 0 SdLazy, 784 SolverSat, 96 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 308 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 424 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 26 NumberOfFragments, 119 HoareAnnotationTreeSize, 7 FomulaSimplifications, 52103879 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 7 FomulaSimplificationsInter, 12354 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 294 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 63 NumberOfCheckSat, 278 ConstructedInterpolants, 0 QuantifiedInterpolants, 12794 SizeOfPredicates, 62 NumberOfNonLiveVariables, 1251 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...