/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:21:08,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:21:08,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:21:08,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:21:08,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:21:08,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:21:08,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:21:08,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:21:08,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:21:08,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:21:08,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:21:08,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:21:08,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:21:08,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:21:08,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:21:08,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:21:08,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:21:08,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:21:08,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:21:08,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:21:08,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:21:08,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:21:08,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:21:08,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:21:08,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:21:08,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:21:08,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:21:08,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:21:08,592 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 [2019-11-06 21:21:08,605 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:21:08,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:21:08,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:21:08,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:21:08,607 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:21:08,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:21:08,608 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:21:08,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:21:08,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:21:08,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:21:08,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:21:08,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:21:08,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:21:08,609 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:21:08,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:21:08,609 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:21:08,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:21:08,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:21:08,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:21:08,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:21:08,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:21:08,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:21:08,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:21:08,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:21:08,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:21:08,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:21:08,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:21:08,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:21:08,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:21:08,909 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:21:08,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:21:08,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:21:08,926 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:21:08,927 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:21:08,927 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-11-06 21:21:08,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281438eb0/a5358325ad7f4cde93e8e2a541d0b069/FLAG33ff8ab4b [2019-11-06 21:21:09,424 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:21:09,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2019-11-06 21:21:09,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281438eb0/a5358325ad7f4cde93e8e2a541d0b069/FLAG33ff8ab4b [2019-11-06 21:21:09,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281438eb0/a5358325ad7f4cde93e8e2a541d0b069 [2019-11-06 21:21:09,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:21:09,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:21:09,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:21:09,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:21:09,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:21:09,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:21:09" (1/1) ... [2019-11-06 21:21:09,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e5aa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:09, skipping insertion in model container [2019-11-06 21:21:09,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:21:09" (1/1) ... [2019-11-06 21:21:09,827 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:21:09,846 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:21:10,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:21:10,035 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:21:10,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:21:10,075 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:21:10,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10 WrapperNode [2019-11-06 21:21:10,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:21:10,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:21:10,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:21:10,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:21:10,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (1/1) ... [2019-11-06 21:21:10,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (1/1) ... [2019-11-06 21:21:10,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (1/1) ... [2019-11-06 21:21:10,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (1/1) ... [2019-11-06 21:21:10,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (1/1) ... [2019-11-06 21:21:10,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (1/1) ... [2019-11-06 21:21:10,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (1/1) ... [2019-11-06 21:21:10,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:21:10,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:21:10,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:21:10,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:21:10,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (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 [2019-11-06 21:21:10,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:21:10,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:21:10,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:21:10,256 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:21:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:21:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:21:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:21:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 21:21:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:21:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:21:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:21:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:21:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:21:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:21:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:21:10,475 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:21:10,476 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 21:21:10,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:21:10 BoogieIcfgContainer [2019-11-06 21:21:10,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:21:10,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:21:10,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:21:10,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:21:10,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:21:09" (1/3) ... [2019-11-06 21:21:10,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6e2624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:21:10, skipping insertion in model container [2019-11-06 21:21:10,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:21:10" (2/3) ... [2019-11-06 21:21:10,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6e2624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:21:10, skipping insertion in model container [2019-11-06 21:21:10,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:21:10" (3/3) ... [2019-11-06 21:21:10,507 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2019-11-06 21:21:10,527 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:21:10,534 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:21:10,547 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:21:10,578 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:21:10,578 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:21:10,578 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:21:10,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:21:10,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:21:10,582 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:21:10,582 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:21:10,582 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:21:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 21:21:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 21:21:10,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:10,618 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:10,620 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1821336840, now seen corresponding path program 1 times [2019-11-06 21:21:10,632 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:10,632 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120028367] [2019-11-06 21:21:10,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:10,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120028367] [2019-11-06 21:21:10,783 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:21:10,784 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:21:10,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638352603] [2019-11-06 21:21:10,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:21:10,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:21:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:21:10,806 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-06 21:21:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:10,886 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-11-06 21:21:10,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:21:10,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-06 21:21:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:10,899 INFO L225 Difference]: With dead ends: 40 [2019-11-06 21:21:10,899 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 21:21:10,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:21:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 21:21:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 21:21:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 21:21:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-06 21:21:10,944 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2019-11-06 21:21:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:10,945 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-06 21:21:10,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:21:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-06 21:21:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 21:21:10,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:10,946 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:10,947 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:10,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1443575666, now seen corresponding path program 1 times [2019-11-06 21:21:10,947 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:10,948 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372333534] [2019-11-06 21:21:10,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:11,134 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372333534] [2019-11-06 21:21:11,134 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:21:11,134 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:21:11,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003319865] [2019-11-06 21:21:11,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:21:11,139 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:21:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:21:11,141 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2019-11-06 21:21:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:11,227 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-11-06 21:21:11,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:21:11,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-06 21:21:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:11,231 INFO L225 Difference]: With dead ends: 36 [2019-11-06 21:21:11,232 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 21:21:11,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:21:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 21:21:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2019-11-06 21:21:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 21:21:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-06 21:21:11,254 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2019-11-06 21:21:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:11,254 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-06 21:21:11,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:21:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-06 21:21:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 21:21:11,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:11,256 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:11,257 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 31729808, now seen corresponding path program 1 times [2019-11-06 21:21:11,258 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:11,258 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561039019] [2019-11-06 21:21:11,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:11,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561039019] [2019-11-06 21:21:11,406 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823077406] [2019-11-06 21:21:11,406 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:11,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 21:21:11,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:11,537 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-06 21:21:11,538 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:11,554 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:21:11,556 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:21:11,557 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2019-11-06 21:21:11,593 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:11,612 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 21:21:11,614 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 21:21:11,616 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2019-11-06 21:21:11,617 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:11,622 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:21:11,623 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:11,636 INFO L567 ElimStorePlain]: treesize reduction 10, result has 47.4 percent of original size [2019-11-06 21:21:11,636 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:21:11,637 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:9 [2019-11-06 21:21:11,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:11,691 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:11,691 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2019-11-06 21:21:11,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512634050] [2019-11-06 21:21:11,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:21:11,692 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:11,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:21:11,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:21:11,693 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-11-06 21:21:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:11,945 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2019-11-06 21:21:11,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:21:11,946 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-06 21:21:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:11,947 INFO L225 Difference]: With dead ends: 46 [2019-11-06 21:21:11,947 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 21:21:11,949 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:21:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 21:21:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2019-11-06 21:21:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 21:21:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-06 21:21:11,963 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 15 [2019-11-06 21:21:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:11,963 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-06 21:21:11,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:21:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-06 21:21:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:21:11,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:11,966 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:12,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:12,170 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:12,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -744847771, now seen corresponding path program 1 times [2019-11-06 21:21:12,172 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:12,172 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515790530] [2019-11-06 21:21:12,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 21:21:12,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515790530] [2019-11-06 21:21:12,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19090130] [2019-11-06 21:21:12,327 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:12,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 21:21:12,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:12,417 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:21:12,418 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:12,446 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.6 percent of original size [2019-11-06 21:21:12,451 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-11-06 21:21:12,451 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:12,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:21:12,467 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:12,468 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-11-06 21:21:12,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:12,694 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:21:12,694 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:12,702 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:21:12,703 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2019-11-06 21:21:12,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:12,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:12,706 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:12,730 INFO L567 ElimStorePlain]: treesize reduction 27, result has 42.6 percent of original size [2019-11-06 21:21:12,731 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:12,731 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:17 [2019-11-06 21:21:12,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:21:12,799 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:12,799 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 13 [2019-11-06 21:21:12,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094161886] [2019-11-06 21:21:12,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 21:21:12,801 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 21:21:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:21:12,801 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2019-11-06 21:21:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:21,424 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2019-11-06 21:21:21,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 21:21:21,427 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2019-11-06 21:21:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:21,429 INFO L225 Difference]: With dead ends: 62 [2019-11-06 21:21:21,429 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 21:21:21,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:21:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 21:21:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-11-06 21:21:21,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:21:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-06 21:21:21,440 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 25 [2019-11-06 21:21:21,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:21,440 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-06 21:21:21,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 21:21:21,441 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-06 21:21:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 21:21:21,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:21,442 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:21,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:21,645 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash 344641978, now seen corresponding path program 2 times [2019-11-06 21:21:21,647 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:21,647 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126970017] [2019-11-06 21:21:21,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:21:21,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126970017] [2019-11-06 21:21:21,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312634108] [2019-11-06 21:21:21,810 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:21,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:21:21,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:21:21,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 21:21:21,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:21,898 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:21:21,899 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:21,921 INFO L567 ElimStorePlain]: treesize reduction 10, result has 75.6 percent of original size [2019-11-06 21:21:21,925 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-11-06 21:21:21,925 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:21,935 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:21:21,936 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:21,937 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-11-06 21:21:22,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:22,237 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 21:21:22,239 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 21:21:22,240 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2019-11-06 21:21:22,241 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:22,244 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:21:22,244 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:22,275 INFO L567 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2019-11-06 21:21:22,276 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:22,276 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:17 [2019-11-06 21:21:22,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 21:21:22,344 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:22,344 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 15 [2019-11-06 21:21:22,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234084696] [2019-11-06 21:21:22,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 21:21:22,345 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 21:21:22,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:21:22,346 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-06 21:21:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:35,442 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2019-11-06 21:21:35,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 21:21:35,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2019-11-06 21:21:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:35,446 INFO L225 Difference]: With dead ends: 80 [2019-11-06 21:21:35,447 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 21:21:35,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:21:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 21:21:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-11-06 21:21:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 21:21:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-06 21:21:35,459 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 35 [2019-11-06 21:21:35,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:35,459 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-06 21:21:35,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 21:21:35,459 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-06 21:21:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 21:21:35,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:35,461 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:35,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:35,664 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash -579179889, now seen corresponding path program 3 times [2019-11-06 21:21:35,666 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:35,666 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532208850] [2019-11-06 21:21:35,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 21:21:35,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532208850] [2019-11-06 21:21:35,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349955038] [2019-11-06 21:21:35,838 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:36,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 21:21:36,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:21:36,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 21:21:36,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:36,132 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-11-06 21:21:36,133 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:36,163 INFO L567 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2019-11-06 21:21:36,163 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_9| vanished before elimination [2019-11-06 21:21:36,164 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:21:36,164 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:24 [2019-11-06 21:21:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 21:21:36,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:36,203 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-06 21:21:36,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469465042] [2019-11-06 21:21:36,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 21:21:36,203 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 21:21:36,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:21:36,204 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 14 states. [2019-11-06 21:21:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:36,531 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2019-11-06 21:21:36,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 21:21:36,531 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-11-06 21:21:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:36,532 INFO L225 Difference]: With dead ends: 94 [2019-11-06 21:21:36,532 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 21:21:36,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-06 21:21:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 21:21:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2019-11-06 21:21:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 21:21:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-06 21:21:36,545 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2019-11-06 21:21:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:36,545 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-06 21:21:36,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 21:21:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-06 21:21:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 21:21:36,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:36,547 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:36,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:36,751 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:36,752 INFO L82 PathProgramCache]: Analyzing trace with hash 9921453, now seen corresponding path program 4 times [2019-11-06 21:21:36,752 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:36,752 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996688727] [2019-11-06 21:21:36,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 21:21:36,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996688727] [2019-11-06 21:21:36,914 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727721824] [2019-11-06 21:21:36,915 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:36,977 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:21:36,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:21:36,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 21:21:36,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:21:37,000 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2019-11-06 21:21:37,001 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:37,037 INFO L567 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2019-11-06 21:21:37,038 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_10| vanished before elimination [2019-11-06 21:21:37,038 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:37,039 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:85, output treesize:24 [2019-11-06 21:21:37,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,077 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:21:37,077 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:37,099 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:21:37,099 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 103 [2019-11-06 21:21:37,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,102 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:37,161 INFO L567 ElimStorePlain]: treesize reduction 35, result has 66.0 percent of original size [2019-11-06 21:21:37,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,164 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:37,165 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:65 [2019-11-06 21:21:37,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,710 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:21:37,710 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:21:37,719 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:21:37,719 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2019-11-06 21:21:37,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,722 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:37,749 INFO L567 ElimStorePlain]: treesize reduction 27, result has 42.6 percent of original size [2019-11-06 21:21:37,750 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:21:37,750 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:17 [2019-11-06 21:21:37,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:21:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 21:21:37,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:21:37,845 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 18 [2019-11-06 21:21:37,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304007017] [2019-11-06 21:21:37,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:21:37,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:21:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:21:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:21:37,849 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2019-11-06 21:21:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:21:47,313 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2019-11-06 21:21:47,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 21:21:47,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2019-11-06 21:21:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:21:47,317 INFO L225 Difference]: With dead ends: 104 [2019-11-06 21:21:47,317 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 21:21:47,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-11-06 21:21:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 21:21:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2019-11-06 21:21:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 21:21:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-11-06 21:21:47,348 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 47 [2019-11-06 21:21:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:21:47,352 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-11-06 21:21:47,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:21:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-11-06 21:21:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 21:21:47,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:21:47,353 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:21:47,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:21:47,558 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:21:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:21:47,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1484610690, now seen corresponding path program 5 times [2019-11-06 21:21:47,558 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:21:47,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779836869] [2019-11-06 21:21:47,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:21:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:21:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-06 21:21:47,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779836869] [2019-11-06 21:21:47,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871166408] [2019-11-06 21:21:47,764 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true