/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/loops/matrix-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:43:04,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:43:04,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:43:04,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:43:04,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:43:04,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:43:04,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:43:04,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:43:04,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:43:04,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:43:04,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:43:04,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:43:04,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:43:04,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:43:04,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:43:04,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:43:04,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:43:04,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:43:04,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:43:04,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:43:04,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:43:04,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:43:04,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:43:04,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:43:04,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:43:04,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:43:04,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:43:04,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:43:04,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:43:04,567 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:43:04,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:43:04,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:43:04,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:43:04,569 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:43:04,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:43:04,569 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:43:04,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:43:04,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:43:04,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:43:04,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:43:04,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:43:04,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:43:04,571 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:43:04,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:43:04,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:43:04,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:43:04,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:43:04,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:43:04,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:43:04,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:43:04,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:43:04,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:43:04,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:43:04,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:43:04,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:43:04,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:43:04,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:43:04,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:43:04,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:43:05,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:43:05,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:43:05,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:43:05,062 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:43:05,063 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:43:05,064 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/matrix-1.c [2020-09-04 13:43:05,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acf5abf34/ae99bce4cb8b43a88395aa75dafe6216/FLAG6aa464f76 [2020-09-04 13:43:05,725 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:43:05,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/matrix-1.c [2020-09-04 13:43:05,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acf5abf34/ae99bce4cb8b43a88395aa75dafe6216/FLAG6aa464f76 [2020-09-04 13:43:06,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acf5abf34/ae99bce4cb8b43a88395aa75dafe6216 [2020-09-04 13:43:06,077 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:43:06,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:43:06,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:06,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:43:06,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:43:06,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10439909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06, skipping insertion in model container [2020-09-04 13:43:06,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:43:06,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:43:06,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:06,419 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:43:06,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:43:06,475 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:43:06,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06 WrapperNode [2020-09-04 13:43:06,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:43:06,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:43:06,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:43:06,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:43:06,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... [2020-09-04 13:43:06,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:43:06,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:43:06,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:43:06,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:43:06,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:43:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:43:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:43:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:43:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:43:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:43:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:43:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:43:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:43:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:43:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:43:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:43:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:43:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:43:07,008 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:43:07,008 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 13:43:07,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:07 BoogieIcfgContainer [2020-09-04 13:43:07,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:43:07,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:43:07,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:43:07,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:43:07,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:43:06" (1/3) ... [2020-09-04 13:43:07,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d696f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:07, skipping insertion in model container [2020-09-04 13:43:07,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:43:06" (2/3) ... [2020-09-04 13:43:07,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d696f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:43:07, skipping insertion in model container [2020-09-04 13:43:07,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:43:07" (3/3) ... [2020-09-04 13:43:07,024 INFO L109 eAbstractionObserver]: Analyzing ICFG matrix-1.c [2020-09-04 13:43:07,036 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:43:07,046 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:43:07,069 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:43:07,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:43:07,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:43:07,106 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:43:07,106 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:43:07,106 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:43:07,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:43:07,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:43:07,107 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:43:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 13:43:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 13:43:07,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:07,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:07,140 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1330517862, now seen corresponding path program 1 times [2020-09-04 13:43:07,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:07,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112779902] [2020-09-04 13:43:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:07,262 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:07,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498681919] [2020-09-04 13:43:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-09-04 13:43:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:07,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112779902] [2020-09-04 13:43:07,366 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:07,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498681919] [2020-09-04 13:43:07,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:07,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 13:43:07,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061737002] [2020-09-04 13:43:07,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 13:43:07,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:07,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 13:43:07,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 13:43:07,397 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-04 13:43:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:07,429 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-09-04 13:43:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 13:43:07,431 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-04 13:43:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:07,443 INFO L225 Difference]: With dead ends: 42 [2020-09-04 13:43:07,443 INFO L226 Difference]: Without dead ends: 17 [2020-09-04 13:43:07,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 13:43:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-04 13:43:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-04 13:43:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-04 13:43:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-09-04 13:43:07,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-09-04 13:43:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:07,498 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-09-04 13:43:07,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 13:43:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-09-04 13:43:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 13:43:07,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:07,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:07,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-09-04 13:43:07,710 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash 672047389, now seen corresponding path program 1 times [2020-09-04 13:43:07,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:07,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067363362] [2020-09-04 13:43:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:07,739 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:07,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134815762] [2020-09-04 13:43:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:07,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:43:07,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:07,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067363362] [2020-09-04 13:43:07,860 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:07,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134815762] [2020-09-04 13:43:07,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:07,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:43:07,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445780385] [2020-09-04 13:43:07,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:43:07,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:43:07,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:43:07,865 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-09-04 13:43:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:07,947 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-09-04 13:43:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:43:07,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-04 13:43:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:07,950 INFO L225 Difference]: With dead ends: 28 [2020-09-04 13:43:07,950 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 13:43:07,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:43:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 13:43:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-09-04 13:43:07,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 13:43:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-04 13:43:07,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-09-04 13:43:07,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:07,958 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-04 13:43:07,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:43:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-04 13:43:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 13:43:07,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:07,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:08,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:08,175 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:08,176 INFO L82 PathProgramCache]: Analyzing trace with hash -830834987, now seen corresponding path program 1 times [2020-09-04 13:43:08,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:08,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669132433] [2020-09-04 13:43:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:08,188 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:08,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582678662] [2020-09-04 13:43:08,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:08,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:43:08,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:08,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669132433] [2020-09-04 13:43:08,309 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:08,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582678662] [2020-09-04 13:43:08,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:08,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:43:08,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900557451] [2020-09-04 13:43:08,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:43:08,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:08,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:43:08,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:43:08,312 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-09-04 13:43:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:08,378 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-09-04 13:43:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:43:08,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-04 13:43:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:08,381 INFO L225 Difference]: With dead ends: 32 [2020-09-04 13:43:08,381 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 13:43:08,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 13:43:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-09-04 13:43:08,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-04 13:43:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-09-04 13:43:08,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-09-04 13:43:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:08,393 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-09-04 13:43:08,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:43:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-09-04 13:43:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:43:08,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:08,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:08,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:08,610 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1529445450, now seen corresponding path program 1 times [2020-09-04 13:43:08,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:08,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881430128] [2020-09-04 13:43:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:08,621 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:08,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615915540] [2020-09-04 13:43:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:43:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:08,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:08,816 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:09,255 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 27 [2020-09-04 13:43:09,256 INFO L625 ElimStorePlain]: treesize reduction 400, result has 8.3 percent of original size [2020-09-04 13:43:09,257 INFO L513 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2020-09-04 13:43:09,257 INFO L513 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2020-09-04 13:43:09,257 INFO L513 ElimStorePlain]: Eliminatee v_prenex_1 vanished before elimination [2020-09-04 13:43:09,257 INFO L513 ElimStorePlain]: Eliminatee |v_#memory_int_7| vanished before elimination [2020-09-04 13:43:09,257 INFO L513 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2020-09-04 13:43:09,276 INFO L384 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 26 treesize of output 22 [2020-09-04 13:43:09,277 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:09,295 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:09,295 INFO L513 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2020-09-04 13:43:09,298 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:43:09,299 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 16 variables, input treesize:497, output treesize:10 [2020-09-04 13:43:09,337 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-09-04 13:43:09,339 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:09,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:09,342 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:43:09,342 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-09-04 13:43:09,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:09,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881430128] [2020-09-04 13:43:09,411 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:09,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615915540] [2020-09-04 13:43:09,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:43:09,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 13:43:09,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23697674] [2020-09-04 13:43:09,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:43:09,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:09,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:43:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:43:09,414 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-09-04 13:43:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:09,657 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-09-04 13:43:09,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:43:09,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-09-04 13:43:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:09,659 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:43:09,659 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 13:43:09,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:43:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 13:43:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-09-04 13:43:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:43:09,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-09-04 13:43:09,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-09-04 13:43:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:09,667 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-09-04 13:43:09,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:43:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-09-04 13:43:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 13:43:09,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:09,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:09,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:09,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1922472460, now seen corresponding path program 1 times [2020-09-04 13:43:09,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:09,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281030099] [2020-09-04 13:43:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:09,893 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:09,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451074333] [2020-09-04 13:43:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:43:09,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-04 13:43:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:09,989 INFO L384 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 [2020-09-04 13:43:09,990 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:09,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:09,998 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:43:09,999 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:7 [2020-09-04 13:43:10,030 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-09-04 13:43:10,031 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:10,033 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:10,034 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:43:10,034 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-09-04 13:43:10,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:10,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281030099] [2020-09-04 13:43:10,105 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:10,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451074333] [2020-09-04 13:43:10,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:43:10,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 13:43:10,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922596363] [2020-09-04 13:43:10,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:43:10,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:43:10,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:43:10,108 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-09-04 13:43:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:10,413 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-09-04 13:43:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:43:10,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-09-04 13:43:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:10,416 INFO L225 Difference]: With dead ends: 41 [2020-09-04 13:43:10,416 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:43:10,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:43:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:43:10,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-09-04 13:43:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 13:43:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-09-04 13:43:10,423 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 18 [2020-09-04 13:43:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:10,424 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-09-04 13:43:10,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:43:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-09-04 13:43:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 13:43:10,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:10,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:10,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:10,628 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:10,628 INFO L82 PathProgramCache]: Analyzing trace with hash -422232267, now seen corresponding path program 2 times [2020-09-04 13:43:10,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:10,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816204677] [2020-09-04 13:43:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:10,638 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:10,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759556974] [2020-09-04 13:43:10,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:10,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:43:10,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:43:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:43:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:10,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816204677] [2020-09-04 13:43:10,751 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:10,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759556974] [2020-09-04 13:43:10,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:43:10,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 13:43:10,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606763075] [2020-09-04 13:43:10,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:43:10,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:10,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:43:10,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:10,753 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-09-04 13:43:10,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:10,795 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-04 13:43:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:43:10,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-04 13:43:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:10,798 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:43:10,799 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 13:43:10,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:43:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 13:43:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 13:43:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 13:43:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-04 13:43:10,808 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-09-04 13:43:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:10,808 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-04 13:43:10,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:43:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-04 13:43:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:43:10,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:10,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:43:11,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:11,011 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:11,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:11,012 INFO L82 PathProgramCache]: Analyzing trace with hash 239488911, now seen corresponding path program 3 times [2020-09-04 13:43:11,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:11,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279228671] [2020-09-04 13:43:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:11,022 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:11,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847939174] [2020-09-04 13:43:11,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:11,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:43:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:43:11,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-04 13:43:11,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:11,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:11,174 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:11,553 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-09-04 13:43:11,554 INFO L625 ElimStorePlain]: treesize reduction 403, result has 10.0 percent of original size [2020-09-04 13:43:11,560 INFO L384 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 26 treesize of output 22 [2020-09-04 13:43:11,561 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:11,577 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:11,578 INFO L513 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2020-09-04 13:43:11,578 INFO L513 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2020-09-04 13:43:11,578 INFO L513 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2020-09-04 13:43:11,578 INFO L513 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2020-09-04 13:43:11,579 INFO L513 ElimStorePlain]: Eliminatee v_prenex_21 vanished before elimination [2020-09-04 13:43:11,579 INFO L513 ElimStorePlain]: Eliminatee v_prenex_19 vanished before elimination [2020-09-04 13:43:11,587 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:43:11,587 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 16 variables, input treesize:513, output treesize:19 [2020-09-04 13:43:11,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-09-04 13:43:11,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-09-04 13:43:11,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-09-04 13:43:12,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:12,171 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:12,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:12,184 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:12,589 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-09-04 13:43:12,591 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:12,591 INFO L384 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 49 treesize of output 139 [2020-09-04 13:43:12,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:12,602 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:12,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:12,613 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:12,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:12,632 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:12,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:12,645 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:12,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-09-04 13:43:12,660 INFO L545 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:12,683 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 50 [2020-09-04 13:43:12,683 INFO L545 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:13,072 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-09-04 13:43:13,073 INFO L625 ElimStorePlain]: treesize reduction 115, result has 68.5 percent of original size [2020-09-04 13:43:13,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:43:13,131 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-09-04 13:43:13,132 INFO L244 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:1157, output treesize:204 [2020-09-04 13:43:13,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:43:15,386 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-09-04 13:43:15,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:15,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:15,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:43:15,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:15,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:43:15,484 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 2, 2, 2, 2, 1] term [2020-09-04 13:43:15,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:15,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-09-04 13:43:15,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-09-04 13:43:15,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279228671] [2020-09-04 13:43:15,540 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:15,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847939174] [2020-09-04 13:43:15,540 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-09-04 13:43:15,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:43:15,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-09-04 13:43:15,541 ERROR L206 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-09-04 13:43:15,541 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:43:15,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:15,787 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-04 13:43:15,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:43:15 BoogieIcfgContainer [2020-09-04 13:43:15,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:43:15,790 INFO L168 Benchmark]: Toolchain (without parser) took 9710.66 ms. Allocated memory was 147.3 MB in the beginning and 244.8 MB in the end (delta: 97.5 MB). Free memory was 102.7 MB in the beginning and 155.3 MB in the end (delta: -52.6 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:15,791 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 147.3 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:43:15,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.12 ms. Allocated memory is still 147.3 MB. Free memory was 102.5 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:15,799 INFO L168 Benchmark]: Boogie Preprocessor took 146.75 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 181.8 MB in the end (delta: -89.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:15,802 INFO L168 Benchmark]: RCFGBuilder took 390.34 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 166.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:15,802 INFO L168 Benchmark]: TraceAbstraction took 8772.91 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 166.4 MB in the beginning and 155.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:15,810 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 147.3 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 395.12 ms. Allocated memory is still 147.3 MB. Free memory was 102.5 MB in the beginning and 92.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.75 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 181.8 MB in the end (delta: -89.4 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 390.34 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 166.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8772.91 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 166.4 MB in the beginning and 155.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L13] unsigned int N_LIN=1; [L14] unsigned int N_COL=1; [L15] unsigned int j,k; [L16] int matriz[N_COL][N_LIN], maior; [L18] maior = __VERIFIER_nondet_int() [L19] j=0 [L19] COND TRUE j=maior [L25] EXPR matriz[j][k] [L25] maior = matriz[j][k] [L20] k++ [L20] COND FALSE !(k=maior [L25] EXPR matriz[j][k] [L25] maior = matriz[j][k] [L20] k++ [L20] COND FALSE !(k