/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:49:20,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:49:20,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:49:20,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:49:20,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:49:20,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:49:20,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:49:20,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:49:20,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:49:20,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:49:20,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:49:20,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:49:20,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:49:20,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:49:20,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:49:20,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:49:20,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:49:20,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:49:20,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:49:20,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:49:20,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:49:20,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:49:20,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:49:20,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:49:20,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:49:20,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:49:20,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:49:20,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:49:20,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:49:20,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:49:20,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:49:20,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:49:20,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:49:20,490 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:49:20,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:49:20,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:49:20,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:49:20,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:49:20,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:49:20,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:49:20,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:49:20,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:49:20,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:49:20,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:49:20,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:49:20,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:49:20,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:49:20,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:49:20,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:49:20,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:49:20,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:49:20,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:49:20,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:49:20,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:49:20,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:49:20,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:20,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:49:20,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:49:20,495 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 -> NOT_INCREMENTALLY [2020-07-20 11:49:20,759 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:49:20,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:49:20,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:49:20,778 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:49:20,779 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:49:20,779 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-07-20 11:49:20,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5971717/ea93335acf4e4332946e8bfc860fb613/FLAGc751911e2 [2020-07-20 11:49:21,218 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:49:21,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-07-20 11:49:21,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5971717/ea93335acf4e4332946e8bfc860fb613/FLAGc751911e2 [2020-07-20 11:49:21,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce5971717/ea93335acf4e4332946e8bfc860fb613 [2020-07-20 11:49:21,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:49:21,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:49:21,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:49:21,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:49:21,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:49:21,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:21" (1/1) ... [2020-07-20 11:49:21,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19dbf883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:21, skipping insertion in model container [2020-07-20 11:49:21,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:21" (1/1) ... [2020-07-20 11:49:21,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:49:21,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:49:21,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:49:21,942 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:49:22,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:49:22,147 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:49:22,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22 WrapperNode [2020-07-20 11:49:22,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:49:22,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:49:22,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:49:22,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:49:22,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... [2020-07-20 11:49:22,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... [2020-07-20 11:49:22,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... [2020-07-20 11:49:22,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... [2020-07-20 11:49:22,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... [2020-07-20 11:49:22,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... [2020-07-20 11:49:22,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... [2020-07-20 11:49:22,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:49:22,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:49:22,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:49:22,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:49:22,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:49:22,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:49:22,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:49:22,262 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:49:22,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:49:22,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:49:22,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:49:22,262 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:49:22,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:49:22,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 11:49:22,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:49:22,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:49:22,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:49:22,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:49:22,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:49:22,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:49:22,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:49:22,565 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:49:22,565 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:49:22,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:22 BoogieIcfgContainer [2020-07-20 11:49:22,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:49:22,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:49:22,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:49:22,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:49:22,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:49:21" (1/3) ... [2020-07-20 11:49:22,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57377dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:22, skipping insertion in model container [2020-07-20 11:49:22,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:22" (2/3) ... [2020-07-20 11:49:22,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57377dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:22, skipping insertion in model container [2020-07-20 11:49:22,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:22" (3/3) ... [2020-07-20 11:49:22,583 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2020-07-20 11:49:22,619 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:49:22,635 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-20 11:49:22,671 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-20 11:49:22,719 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:49:22,719 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:49:22,719 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:49:22,719 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:49:22,720 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:49:22,720 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:49:22,720 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:49:22,720 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:49:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 11:49:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:49:22,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:22,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:22,766 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1504353719, now seen corresponding path program 1 times [2020-07-20 11:49:22,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:22,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003303762] [2020-07-20 11:49:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:49:22,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:22,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:22,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003303762] [2020-07-20 11:49:22,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:22,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:49:22,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463321687] [2020-07-20 11:49:22,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:49:22,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:22,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:49:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:49:22,993 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-20 11:49:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:23,045 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2020-07-20 11:49:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:49:23,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 11:49:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:23,064 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:49:23,065 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:49:23,072 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 [2020-07-20 11:49:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:49:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-07-20 11:49:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:49:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-07-20 11:49:23,116 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2020-07-20 11:49:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:23,117 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-07-20 11:49:23,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:49:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-07-20 11:49:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:49:23,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:23,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:23,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:23,321 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1581018098, now seen corresponding path program 1 times [2020-07-20 11:49:23,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:23,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326675725] [2020-07-20 11:49:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:49:23,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:23,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:23,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326675725] [2020-07-20 11:49:23,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:23,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:49:23,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64265970] [2020-07-20 11:49:23,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:49:23,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:49:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:49:23,433 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2020-07-20 11:49:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:23,473 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-07-20 11:49:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:49:23,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-20 11:49:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:23,475 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:49:23,476 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 11:49:23,477 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 [2020-07-20 11:49:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 11:49:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2020-07-20 11:49:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:49:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-20 11:49:23,486 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 14 [2020-07-20 11:49:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:23,486 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-20 11:49:23,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:49:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-20 11:49:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:49:23,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:23,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:23,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:23,701 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:23,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1644741047, now seen corresponding path program 1 times [2020-07-20 11:49:23,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:23,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593881144] [2020-07-20 11:49:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:23,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:49:23,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:23,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:23,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593881144] [2020-07-20 11:49:23,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:23,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:49:23,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410599021] [2020-07-20 11:49:23,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:49:23,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:23,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:49:23,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:49:23,777 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-07-20 11:49:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:23,820 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-20 11:49:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:49:23,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-20 11:49:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:23,822 INFO L225 Difference]: With dead ends: 60 [2020-07-20 11:49:23,822 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 11:49:23,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:49:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 11:49:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-07-20 11:49:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:49:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 11:49:23,830 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2020-07-20 11:49:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:23,831 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 11:49:23,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:49:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 11:49:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 11:49:23,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:23,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:24,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:24,051 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1824116622, now seen corresponding path program 1 times [2020-07-20 11:49:24,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:24,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027830247] [2020-07-20 11:49:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:24,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:49:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:24,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:24,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027830247] [2020-07-20 11:49:24,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:24,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:49:24,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845450118] [2020-07-20 11:49:24,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:49:24,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:49:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:49:24,129 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2020-07-20 11:49:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:24,177 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-20 11:49:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:49:24,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-20 11:49:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:24,179 INFO L225 Difference]: With dead ends: 54 [2020-07-20 11:49:24,179 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 11:49:24,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:49:24,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 11:49:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-07-20 11:49:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 11:49:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 11:49:24,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2020-07-20 11:49:24,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:24,186 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 11:49:24,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:49:24,186 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 11:49:24,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:49:24,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:24,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:24,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:24,401 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1385845809, now seen corresponding path program 1 times [2020-07-20 11:49:24,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:24,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152212678] [2020-07-20 11:49:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 11:49:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:24,929 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,931 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,933 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,940 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,944 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,945 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,949 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,954 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,956 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,957 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,960 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,964 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,965 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,968 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,973 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,974 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,978 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,985 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:24,994 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:24,996 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,000 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,009 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,012 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,016 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,020 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,026 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,029 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,033 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,041 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,043 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,047 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,053 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,064 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,065 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,070 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,074 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,076 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,078 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,084 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,087 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,089 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,091 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,094 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,096 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,096 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,099 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,101 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:49:25,102 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,104 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 11:49:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:25,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:25,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152212678] [2020-07-20 11:49:25,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:25,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 11:49:25,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625434094] [2020-07-20 11:49:25,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:49:25,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:49:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:49:25,308 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2020-07-20 11:49:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:29,675 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-20 11:49:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:49:29,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-20 11:49:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:29,676 INFO L225 Difference]: With dead ends: 39 [2020-07-20 11:49:29,676 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 11:49:29,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:49:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 11:49:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 11:49:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:49:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-07-20 11:49:29,682 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 20 [2020-07-20 11:49:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:29,683 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-07-20 11:49:29,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:49:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-07-20 11:49:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:49:29,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:29,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:29,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:29,891 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -624217503, now seen corresponding path program 1 times [2020-07-20 11:49:29,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:29,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499516268] [2020-07-20 11:49:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:49:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:32,200 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 11:49:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:33,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:33,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499516268] [2020-07-20 11:49:33,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:33,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:49:33,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327306653] [2020-07-20 11:49:33,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:49:33,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:49:33,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=11, Unknown=2, NotChecked=0, Total=20 [2020-07-20 11:49:33,358 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-07-20 11:49:34,949 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 11:49:36,724 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 11:49:40,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:40,516 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-07-20 11:49:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:49:40,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 11:49:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:40,524 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:49:40,524 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:49:40,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2020-07-20 11:49:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:49:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2020-07-20 11:49:40,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 11:49:40,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 11:49:40,532 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2020-07-20 11:49:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:40,533 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 11:49:40,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:49:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 11:49:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:49:40,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:40,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:40,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:40,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash -640274852, now seen corresponding path program 1 times [2020-07-20 11:49:40,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:40,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364393766] [2020-07-20 11:49:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:49:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:40,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:40,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364393766] [2020-07-20 11:49:40,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:40,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:49:40,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046786165] [2020-07-20 11:49:40,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:49:40,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:49:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:49:40,813 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 4 states. [2020-07-20 11:49:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:40,856 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-20 11:49:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:49:40,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 11:49:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:40,859 INFO L225 Difference]: With dead ends: 49 [2020-07-20 11:49:40,859 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:49:40,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:49:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:49:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2020-07-20 11:49:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 11:49:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-07-20 11:49:40,866 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 21 [2020-07-20 11:49:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:40,866 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-07-20 11:49:40,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:49:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-07-20 11:49:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:49:40,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:40,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:41,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:41,071 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:41,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1635846330, now seen corresponding path program 1 times [2020-07-20 11:49:41,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:41,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810154377] [2020-07-20 11:49:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:49:41,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:41,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:41,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810154377] [2020-07-20 11:49:41,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:41,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:49:41,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777437673] [2020-07-20 11:49:41,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:49:41,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:49:41,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:49:41,209 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-07-20 11:49:43,373 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-07-20 11:49:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:43,462 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-07-20 11:49:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:49:43,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-07-20 11:49:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:43,464 INFO L225 Difference]: With dead ends: 59 [2020-07-20 11:49:43,464 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:49:43,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:49:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:49:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-07-20 11:49:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 11:49:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-07-20 11:49:43,470 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2020-07-20 11:49:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:43,471 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-07-20 11:49:43,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:49:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-07-20 11:49:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:49:43,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:43,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:43,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:43,684 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash -874117243, now seen corresponding path program 1 times [2020-07-20 11:49:43,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:43,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633244598] [2020-07-20 11:49:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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