/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/array-multidimensional/diff-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:49:58,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:49:58,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:49:58,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:49:58,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:49:58,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:49:58,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:49:58,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:49:58,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:49:58,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:49:58,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:49:58,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:49:58,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:49:58,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:49:58,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:49:58,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:49:58,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:49:58,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:49:58,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:49:58,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:49:58,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:49:58,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:49:58,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:49:58,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:49:58,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:49:58,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:49:58,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:49:58,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:49:58,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:49:58,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:49:58,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:49:58,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:49:58,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:49:58,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:49:58,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:49:58,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:49:58,162 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 18:49:58,182 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:49:58,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:49:58,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:49:58,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:49:58,184 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:49:58,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:49:58,185 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:49:58,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:49:58,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:49:58,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:49:58,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:49:58,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:49:58,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:49:58,187 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:49:58,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:49:58,188 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:49:58,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:49:58,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:49:58,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:49:58,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:49:58,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:49:58,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:49:58,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:49:58,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:49:58,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:49:58,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:49:58,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:49:58,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:49:58,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:49:58,431 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:49:58,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:49:58,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:49:58,449 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:49:58,449 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:49:58,450 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-11-06 18:49:58,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a3fc392/111f3653d9124be6814b996c1118f25c/FLAGe95f2929e [2019-11-06 18:49:59,006 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:49:59,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-11-06 18:49:59,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a3fc392/111f3653d9124be6814b996c1118f25c/FLAGe95f2929e [2019-11-06 18:49:59,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a3fc392/111f3653d9124be6814b996c1118f25c [2019-11-06 18:49:59,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:49:59,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:49:59,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:59,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:49:59,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:49:59,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b80036e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59, skipping insertion in model container [2019-11-06 18:49:59,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,430 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:49:59,451 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:49:59,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:59,744 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:49:59,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:49:59,882 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:49:59,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59 WrapperNode [2019-11-06 18:49:59,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:49:59,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:49:59,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:49:59,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:49:59,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (1/1) ... [2019-11-06 18:49:59,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:49:59,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:49:59,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:49:59,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:49:59,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (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 18:49:59,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:49:59,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:49:59,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:49:59,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:49:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:49:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:49:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 18:49:59,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:49:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:49:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:49:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:49:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:49:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:49:59,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:50:00,347 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:50:00,348 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 18:50:00,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:00 BoogieIcfgContainer [2019-11-06 18:50:00,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:50:00,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:50:00,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:50:00,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:50:00,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:49:59" (1/3) ... [2019-11-06 18:50:00,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70286ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:00, skipping insertion in model container [2019-11-06 18:50:00,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:49:59" (2/3) ... [2019-11-06 18:50:00,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70286ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:00, skipping insertion in model container [2019-11-06 18:50:00,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:00" (3/3) ... [2019-11-06 18:50:00,357 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2019-11-06 18:50:00,367 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:50:00,374 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:50:00,386 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:50:00,411 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:50:00,411 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:50:00,411 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:50:00,411 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:50:00,411 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:50:00,411 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:50:00,412 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:50:00,412 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:50:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-06 18:50:00,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:50:00,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:00,438 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:00,440 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-11-06 18:50:00,455 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:00,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782200525] [2019-11-06 18:50:00,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:00,546 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:00,547 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234203580] [2019-11-06 18:50:00,547 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 18:50:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:00,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 18:50:00,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:00,658 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 18:50:00,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782200525] [2019-11-06 18:50:00,659 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:00,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234203580] [2019-11-06 18:50:00,660 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:00,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 18:50:00,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570988402] [2019-11-06 18:50:00,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 18:50:00,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:00,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 18:50:00,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:50:00,683 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-11-06 18:50:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:00,707 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-11-06 18:50:00,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 18:50:00,711 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-06 18:50:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:00,721 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:50:00,722 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:50:00,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:50:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:50:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 18:50:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:50:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-06 18:50:00,773 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-11-06 18:50:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:00,773 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-06 18:50:00,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 18:50:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-06 18:50:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:50:00,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:00,775 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:00,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:00,977 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:00,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-11-06 18:50:00,979 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:00,979 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680419651] [2019-11-06 18:50:00,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:00,989 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:00,989 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530957092] [2019-11-06 18:50:00,989 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 18:50:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:01,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:01,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:01,094 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 18:50:01,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680419651] [2019-11-06 18:50:01,095 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:01,095 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530957092] [2019-11-06 18:50:01,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:01,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:50:01,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402566525] [2019-11-06 18:50:01,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:50:01,098 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:50:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:01,099 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 3 states. [2019-11-06 18:50:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:01,152 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-11-06 18:50:01,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:50:01,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:50:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:01,155 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:50:01,155 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:50:01,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 18:50:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:50:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-11-06 18:50:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:50:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-06 18:50:01,163 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-11-06 18:50:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:01,164 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-06 18:50:01,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:50:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-06 18:50:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:50:01,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:01,165 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:01,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:01,377 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:01,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2133227694, now seen corresponding path program 1 times [2019-11-06 18:50:01,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:01,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729575662] [2019-11-06 18:50:01,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:01,392 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:01,393 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441007388] [2019-11-06 18:50:01,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 18:50:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:01,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:01,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:01,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729575662] [2019-11-06 18:50:01,483 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:01,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441007388] [2019-11-06 18:50:01,488 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:01,489 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:01,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063162562] [2019-11-06 18:50:01,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:01,490 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:01,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:01,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:01,490 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-11-06 18:50:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:01,593 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2019-11-06 18:50:01,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:01,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-06 18:50:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:01,597 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:50:01,597 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:50:01,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:50:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-11-06 18:50:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:50:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-11-06 18:50:01,611 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-11-06 18:50:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:01,611 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-11-06 18:50:01,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-11-06 18:50:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:50:01,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:01,613 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:01,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:01,819 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1108398309, now seen corresponding path program 1 times [2019-11-06 18:50:01,821 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:01,821 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636401630] [2019-11-06 18:50:01,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:01,831 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:01,831 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398864747] [2019-11-06 18:50:01,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -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 18:50:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:01,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:01,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:01,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636401630] [2019-11-06 18:50:01,913 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:01,913 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398864747] [2019-11-06 18:50:01,914 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:01,914 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:01,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428225451] [2019-11-06 18:50:01,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:01,915 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:01,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:01,916 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 4 states. [2019-11-06 18:50:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:01,996 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-11-06 18:50:01,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:01,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:50:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:01,998 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:50:01,998 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:50:01,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:01,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:50:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-11-06 18:50:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:50:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-11-06 18:50:02,008 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2019-11-06 18:50:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:02,008 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-11-06 18:50:02,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-11-06 18:50:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:50:02,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:02,010 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:02,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:02,213 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:02,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1602833213, now seen corresponding path program 1 times [2019-11-06 18:50:02,214 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:02,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976080736] [2019-11-06 18:50:02,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:02,224 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:02,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055630238] [2019-11-06 18:50:02,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -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 18:50:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:02,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:02,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:02,304 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976080736] [2019-11-06 18:50:02,304 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:02,304 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055630238] [2019-11-06 18:50:02,304 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:02,304 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:02,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098744575] [2019-11-06 18:50:02,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:02,305 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:02,306 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-11-06 18:50:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:02,391 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-11-06 18:50:02,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:02,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-06 18:50:02,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:02,393 INFO L225 Difference]: With dead ends: 79 [2019-11-06 18:50:02,393 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:50:02,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:02,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:50:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-11-06 18:50:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:50:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-11-06 18:50:02,403 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2019-11-06 18:50:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:02,403 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-11-06 18:50:02,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-11-06 18:50:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:50:02,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:02,404 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:02,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:02,609 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:02,609 INFO L82 PathProgramCache]: Analyzing trace with hash 249553947, now seen corresponding path program 2 times [2019-11-06 18:50:02,610 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:02,610 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552540235] [2019-11-06 18:50:02,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:02,618 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:02,619 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285778098] [2019-11-06 18:50:02,619 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 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 [2019-11-06 18:50:02,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:50:02,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:02,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:02,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:50:02,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552540235] [2019-11-06 18:50:02,725 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:02,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285778098] [2019-11-06 18:50:02,725 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:02,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:02,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663250258] [2019-11-06 18:50:02,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:02,727 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:02,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:02,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:02,729 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-11-06 18:50:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:02,792 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2019-11-06 18:50:02,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:02,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-06 18:50:02,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:02,795 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:50:02,795 INFO L226 Difference]: Without dead ends: 70 [2019-11-06 18:50:02,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-06 18:50:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2019-11-06 18:50:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:50:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-11-06 18:50:02,815 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-11-06 18:50:02,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:02,815 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-11-06 18:50:02,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-11-06 18:50:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:50:02,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:02,818 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:03,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:03,021 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:03,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:03,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1698801625, now seen corresponding path program 1 times [2019-11-06 18:50:03,022 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:03,023 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968669184] [2019-11-06 18:50:03,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:03,031 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:03,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094760735] [2019-11-06 18:50:03,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -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 [2019-11-06 18:50:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:03,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:50:03,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:50:03,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968669184] [2019-11-06 18:50:03,141 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:03,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094760735] [2019-11-06 18:50:03,142 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:03,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:50:03,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045493899] [2019-11-06 18:50:03,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:50:03,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:03,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:50:03,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:03,144 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-11-06 18:50:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:03,238 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2019-11-06 18:50:03,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:50:03,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-11-06 18:50:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:03,240 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:50:03,240 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:50:03,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:50:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-06 18:50:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:50:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2019-11-06 18:50:03,259 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2019-11-06 18:50:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:03,260 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2019-11-06 18:50:03,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:50:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2019-11-06 18:50:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:50:03,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:03,265 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:03,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:03,471 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash -602786922, now seen corresponding path program 2 times [2019-11-06 18:50:03,472 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:03,472 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719186882] [2019-11-06 18:50:03,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:03,480 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:03,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888209170] [2019-11-06 18:50:03,480 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:03,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:03,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:03,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:50:03,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:50:03,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719186882] [2019-11-06 18:50:03,599 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:03,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888209170] [2019-11-06 18:50:03,600 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:03,600 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:50:03,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577284689] [2019-11-06 18:50:03,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:50:03,601 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:03,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:50:03,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:03,602 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2019-11-06 18:50:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:03,733 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2019-11-06 18:50:03,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:50:03,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-06 18:50:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:03,735 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:50:03,735 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:50:03,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:50:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:50:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-06 18:50:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:50:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-11-06 18:50:03,759 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 35 [2019-11-06 18:50:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:03,759 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-11-06 18:50:03,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:50:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-11-06 18:50:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:50:03,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:03,761 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:03,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:03,970 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -119527047, now seen corresponding path program 3 times [2019-11-06 18:50:03,971 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:03,971 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195633532] [2019-11-06 18:50:03,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:03,982 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:03,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864335876] [2019-11-06 18:50:03,982 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:04,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:50:04,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:04,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:04,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-06 18:50:04,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195633532] [2019-11-06 18:50:04,122 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:04,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864335876] [2019-11-06 18:50:04,123 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:04,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:04,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475435214] [2019-11-06 18:50:04,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:04,124 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:04,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:04,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:04,124 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 5 states. [2019-11-06 18:50:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:04,205 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2019-11-06 18:50:04,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:04,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-11-06 18:50:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:04,207 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:50:04,207 INFO L226 Difference]: Without dead ends: 128 [2019-11-06 18:50:04,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-06 18:50:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2019-11-06 18:50:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 18:50:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-11-06 18:50:04,235 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 37 [2019-11-06 18:50:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:04,235 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-11-06 18:50:04,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:04,236 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-11-06 18:50:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:50:04,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:04,242 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:04,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:04,449 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:04,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1459343723, now seen corresponding path program 4 times [2019-11-06 18:50:04,450 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:04,450 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591693526] [2019-11-06 18:50:04,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:04,457 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:04,458 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940307033] [2019-11-06 18:50:04,458 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true