/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:13:31,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:13:31,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:13:31,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:13:31,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:13:31,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:13:31,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:13:31,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:13:31,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:13:31,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:13:31,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:13:31,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:13:31,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:13:31,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:13:31,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:13:31,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:13:31,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:13:31,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:13:31,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:13:31,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:13:31,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:13:31,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:13:31,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:13:31,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:13:31,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 06:13:31,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 06:13:31,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 06:13:31,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 06:13:31,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 06:13:31,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 06:13:31,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 06:13:31,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 06:13:31,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 06:13:31,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 06:13:31,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 06:13:31,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 06:13:31,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 06:13:31,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 06:13:31,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:13:31,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:13:31,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:13:31,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 06:13:31,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:13:31,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:13:31,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:13:31,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:13:31,557 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:13:31,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:13:31,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:13:31,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:13:31,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:13:31,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:13:31,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:13:31,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:13:31,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:13:31,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:13:31,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:13:31,559 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:13:31,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:13:31,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:13:31,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:13:31,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:13:31,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:13:31,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:13:31,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:13:31,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:13:31,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:13:31,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:13:31,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:13:31,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:13:31,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:13:31,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:13:31,896 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:13:31,919 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:13:31,923 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:13:31,925 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:13:31,925 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:13:31,926 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 06:13:31,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c455e0f/1d7113cc1a3d47d09d2c7b9d1004895f/FLAG5a291a11b [2020-07-20 06:13:32,480 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:13:32,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 06:13:32,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c455e0f/1d7113cc1a3d47d09d2c7b9d1004895f/FLAG5a291a11b [2020-07-20 06:13:32,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7c455e0f/1d7113cc1a3d47d09d2c7b9d1004895f [2020-07-20 06:13:32,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:13:32,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:13:32,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:13:32,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:13:32,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:13:32,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:32" (1/1) ... [2020-07-20 06:13:32,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa323d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:32, skipping insertion in model container [2020-07-20 06:13:32,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:32" (1/1) ... [2020-07-20 06:13:32,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:13:32,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:13:33,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:13:33,120 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:13:33,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:13:33,150 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:13:33,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33 WrapperNode [2020-07-20 06:13:33,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:13:33,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:13:33,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:13:33,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:13:33,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... [2020-07-20 06:13:33,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... [2020-07-20 06:13:33,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... [2020-07-20 06:13:33,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... [2020-07-20 06:13:33,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... [2020-07-20 06:13:33,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... [2020-07-20 06:13:33,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... [2020-07-20 06:13:33,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:13:33,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:13:33,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:13:33,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:13:33,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:13:33,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:13:33,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:13:33,327 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:13:33,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:13:33,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:13:33,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:13:33,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:13:33,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:13:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:13:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:13:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:13:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:13:33,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:13:33,516 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:13:33,516 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 06:13:33,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:33 BoogieIcfgContainer [2020-07-20 06:13:33,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:13:33,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:13:33,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:13:33,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:13:33,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:13:32" (1/3) ... [2020-07-20 06:13:33,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af8f80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:33, skipping insertion in model container [2020-07-20 06:13:33,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:33" (2/3) ... [2020-07-20 06:13:33,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af8f80e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:33, skipping insertion in model container [2020-07-20 06:13:33,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:33" (3/3) ... [2020-07-20 06:13:33,530 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-20 06:13:33,542 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:13:33,551 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:13:33,579 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:13:33,615 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:13:33,615 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:13:33,616 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:13:33,616 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:13:33,616 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:13:33,617 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:13:33,617 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:13:33,617 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:13:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 06:13:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 06:13:33,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:33,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:33,652 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 06:13:33,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:33,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853144325] [2020-07-20 06:13:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@85c5e72 [2020-07-20 06:13:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:13:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:13:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:13:33,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853144325] [2020-07-20 06:13:33,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:13:33,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 06:13:33,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110252562] [2020-07-20 06:13:33,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 06:13:33,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:33,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 06:13:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:13:33,816 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 06:13:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:33,843 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 06:13:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 06:13:33,844 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 06:13:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:33,854 INFO L225 Difference]: With dead ends: 35 [2020-07-20 06:13:33,855 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 06:13:33,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 06:13:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 06:13:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 06:13:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:13:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 06:13:33,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 06:13:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:33,902 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 06:13:33,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 06:13:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 06:13:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 06:13:33,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:33,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:33,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:13:33,905 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 06:13:33,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:33,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778084593] [2020-07-20 06:13:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@85c5e72 [2020-07-20 06:13:33,916 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:13:33,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178354738] [2020-07-20 06:13:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:33,986 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a97a36 issued 3 check-sat command(s) [2020-07-20 06:13:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:13:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:13:34,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778084593] [2020-07-20 06:13:34,083 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:13:34,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178354738] [2020-07-20 06:13:34,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:13:34,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:13:34,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71139499] [2020-07-20 06:13:34,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:13:34,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:13:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:13:34,096 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 06:13:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:34,171 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 06:13:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 06:13:34,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 06:13:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:34,173 INFO L225 Difference]: With dead ends: 25 [2020-07-20 06:13:34,173 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 06:13:34,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:13:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 06:13:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 06:13:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 06:13:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 06:13:34,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 06:13:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:34,186 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 06:13:34,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:13:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 06:13:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 06:13:34,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:34,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:34,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:13:34,401 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 06:13:34,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:34,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925773785] [2020-07-20 06:13:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@85c5e72 [2020-07-20 06:13:34,411 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:13:34,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430689807] [2020-07-20 06:13:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@279c15a6 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 [2020-07-20 06:13:34,453 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@279c15a6 issued 4 check-sat command(s) [2020-07-20 06:13:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:34,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 06:13:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:13:34,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925773785] [2020-07-20 06:13:34,545 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:13:34,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430689807] [2020-07-20 06:13:34,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:13:34,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-20 06:13:34,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729680211] [2020-07-20 06:13:34,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:13:34,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:34,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:13:34,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:13:34,548 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-20 06:13:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:34,625 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 06:13:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:13:34,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 06:13:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:34,627 INFO L225 Difference]: With dead ends: 32 [2020-07-20 06:13:34,627 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 06:13:34,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:13:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 06:13:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 06:13:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 06:13:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 06:13:34,636 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-20 06:13:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:34,636 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 06:13:34,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:13:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 06:13:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 06:13:34,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:34,638 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:34,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:34,839 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:34,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 06:13:34,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:34,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821965120] [2020-07-20 06:13:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@85c5e72 [2020-07-20 06:13:34,848 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:13:34,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103237340] [2020-07-20 06:13:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe32303 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:34,959 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe32303 issued 4 check-sat command(s) [2020-07-20 06:13:34,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:34,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 06:13:34,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:39,330 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 06:13:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 06:13:39,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821965120] [2020-07-20 06:13:39,434 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:13:39,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103237340] [2020-07-20 06:13:39,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:13:39,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 06:13:39,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485990639] [2020-07-20 06:13:39,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:13:39,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:13:39,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2020-07-20 06:13:39,437 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-20 06:13:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:53,443 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-20 06:13:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:13:53,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-07-20 06:13:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:53,447 INFO L225 Difference]: With dead ends: 39 [2020-07-20 06:13:53,447 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 06:13:53,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-20 06:13:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 06:13:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 06:13:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 06:13:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-20 06:13:53,471 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2020-07-20 06:13:53,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:53,471 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-20 06:13:53,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:13:53,472 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-20 06:13:53,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 06:13:53,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:53,475 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:53,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:53,676 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash -854689591, now seen corresponding path program 1 times [2020-07-20 06:13:53,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:53,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908635453] [2020-07-20 06:13:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@85c5e72 [2020-07-20 06:13:53,689 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:13:53,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668319547] [2020-07-20 06:13:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6479d770 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 [2020-07-20 06:13:53,778 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6479d770 issued 4 check-sat command(s) [2020-07-20 06:13:53,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:13:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 06:13:53,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:13:54,210 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:13:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 06:13:54,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908635453] [2020-07-20 06:13:54,289 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 06:13:54,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668319547] [2020-07-20 06:13:54,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:13:54,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 06:13:54,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792330037] [2020-07-20 06:13:54,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:13:54,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:13:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:13:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:13:54,291 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 7 states. [2020-07-20 06:13:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:13:56,889 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-07-20 06:13:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:13:56,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-07-20 06:13:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:13:56,894 INFO L225 Difference]: With dead ends: 41 [2020-07-20 06:13:56,894 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 06:13:56,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:13:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 06:13:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-07-20 06:13:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 06:13:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 06:13:56,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 30 [2020-07-20 06:13:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:13:56,903 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 06:13:56,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:13:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 06:13:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 06:13:56,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:13:56,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:13:57,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:13:57,106 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:13:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:13:57,107 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 06:13:57,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:13:57,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125225227] [2020-07-20 06:13:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@85c5e72 [2020-07-20 06:13:57,114 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:13:57,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011644658] [2020-07-20 06:13:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c638593 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