/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/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:45:48,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:45:48,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:45:48,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:45:48,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:45:48,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:45:48,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:45:48,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:45:48,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:45:48,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:45:48,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:45:48,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:45:48,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:45:48,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:45:48,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:45:48,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:45:48,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:45:48,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:45:48,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:45:48,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:45:48,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:45:48,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:45:48,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:45:48,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:45:48,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:45:48,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:45:48,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:45:48,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:45:48,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:45:48,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:45:48,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:45:48,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:45:48,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:45:48,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:45:48,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:45:48,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:45:48,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:45:48,358 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:45:48,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:45:48,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:45:48,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:45:48,362 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:45:48,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:45:48,362 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:45:48,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:45:48,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:45:48,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:45:48,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:45:48,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:45:48,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:45:48,365 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:45:48,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:45:48,366 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:45:48,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:45:48,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:45:48,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:45:48,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:45:48,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:45:48,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:45:48,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:45:48,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:45:48,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:45:48,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:45:48,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:45:48,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:45:48,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:45:48,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:45:48,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:45:48,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:45:48,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:45:48,860 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:45:48,866 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:45:48,868 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-09-04 13:45:48,946 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee8f357e2/7d81aee4105a4d3d8498565ee11cd471/FLAGe5bceb782 [2020-09-04 13:45:49,484 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:45:49,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-09-04 13:45:49,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee8f357e2/7d81aee4105a4d3d8498565ee11cd471/FLAGe5bceb782 [2020-09-04 13:45:49,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee8f357e2/7d81aee4105a4d3d8498565ee11cd471 [2020-09-04 13:45:49,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:45:49,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:45:49,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:45:49,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:45:49,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:45:49,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:45:49" (1/1) ... [2020-09-04 13:45:49,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e0ef97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:49, skipping insertion in model container [2020-09-04 13:45:49,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:45:49" (1/1) ... [2020-09-04 13:45:49,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:45:49,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:45:50,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:45:50,112 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:45:50,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:45:50,156 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:45:50,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50 WrapperNode [2020-09-04 13:45:50,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:45:50,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:45:50,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:45:50,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:45:50,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... [2020-09-04 13:45:50,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... [2020-09-04 13:45:50,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... [2020-09-04 13:45:50,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... [2020-09-04 13:45:50,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... [2020-09-04 13:45:50,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... [2020-09-04 13:45:50,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... [2020-09-04 13:45:50,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:45:50,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:45:50,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:45:50,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:45:50,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:45:50,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:45:50,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:45:50,408 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:45:50,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:45:50,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:45:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:45:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:45:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:45:50,409 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:45:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:45:50,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:45:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:45:50,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:45:50,654 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:45:50,654 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 13:45:50,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:45:50 BoogieIcfgContainer [2020-09-04 13:45:50,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:45:50,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:45:50,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:45:50,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:45:50,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:45:49" (1/3) ... [2020-09-04 13:45:50,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e1f3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:45:50, skipping insertion in model container [2020-09-04 13:45:50,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:45:50" (2/3) ... [2020-09-04 13:45:50,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e1f3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:45:50, skipping insertion in model container [2020-09-04 13:45:50,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:45:50" (3/3) ... [2020-09-04 13:45:50,670 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-09-04 13:45:50,682 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:45:50,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:45:50,720 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:45:50,761 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:45:50,762 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:45:50,762 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:45:50,762 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:45:50,762 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:45:50,763 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:45:50,763 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:45:50,763 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:45:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 13:45:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 13:45:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:50,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:50,804 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-09-04 13:45:50,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:50,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343623624] [2020-09-04 13:45:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:51,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:45:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:45:51,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343623624] [2020-09-04 13:45:51,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:45:51,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 13:45:51,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372131173] [2020-09-04 13:45:51,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 13:45:51,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:51,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 13:45:51,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 13:45:51,044 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-04 13:45:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:51,078 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-09-04 13:45:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 13:45:51,080 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-04 13:45:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:51,093 INFO L225 Difference]: With dead ends: 43 [2020-09-04 13:45:51,094 INFO L226 Difference]: Without dead ends: 19 [2020-09-04 13:45:51,099 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 [2020-09-04 13:45:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-04 13:45:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-04 13:45:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-04 13:45:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-09-04 13:45:51,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-09-04 13:45:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:51,156 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-09-04 13:45:51,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 13:45:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-09-04 13:45:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-04 13:45:51,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:51,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:51,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:45:51,158 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1082567597, now seen corresponding path program 1 times [2020-09-04 13:45:51,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:51,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227042089] [2020-09-04 13:45:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:51,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:45:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:45:51,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227042089] [2020-09-04 13:45:51,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:45:51,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:45:51,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745777577] [2020-09-04 13:45:51,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:45:51,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:45:51,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:45:51,322 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-09-04 13:45:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:51,431 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-09-04 13:45:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:45:51,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-09-04 13:45:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:51,434 INFO L225 Difference]: With dead ends: 25 [2020-09-04 13:45:51,434 INFO L226 Difference]: Without dead ends: 23 [2020-09-04 13:45:51,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:45:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-04 13:45:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-04 13:45:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-04 13:45:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-04 13:45:51,454 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-09-04 13:45:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:51,454 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-04 13:45:51,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:45:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-04 13:45:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 13:45:51,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:51,456 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:51,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:45:51,457 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-09-04 13:45:51,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:51,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376050422] [2020-09-04 13:45:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:51,490 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:45:51,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237383932] [2020-09-04 13:45:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:51,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:45:51,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:45:51,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376050422] [2020-09-04 13:45:51,657 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:45:51,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237383932] [2020-09-04 13:45:51,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:45:51,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:45:51,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077581083] [2020-09-04 13:45:51,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:45:51,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:51,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:45:51,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:45:51,661 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-09-04 13:45:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:51,739 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-09-04 13:45:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:45:51,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-04 13:45:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:51,741 INFO L225 Difference]: With dead ends: 37 [2020-09-04 13:45:51,742 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:45:51,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:45:51,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:45:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-09-04 13:45:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 13:45:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-09-04 13:45:51,755 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-09-04 13:45:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:51,756 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-09-04 13:45:51,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:45:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-09-04 13:45:51,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 13:45:51,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:51,757 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:51,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:45:51,972 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-09-04 13:45:51,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:51,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316361705] [2020-09-04 13:45:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:51,991 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:45:51,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738181320] [2020-09-04 13:45:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:45:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:45:52,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316361705] [2020-09-04 13:45:52,085 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:45:52,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738181320] [2020-09-04 13:45:52,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:45:52,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:45:52,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316395535] [2020-09-04 13:45:52,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:45:52,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:45:52,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:45:52,093 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-09-04 13:45:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:52,195 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-09-04 13:45:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:45:52,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-04 13:45:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:52,198 INFO L225 Difference]: With dead ends: 41 [2020-09-04 13:45:52,198 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:45:52,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:45:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:45:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 13:45:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:45:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-09-04 13:45:52,223 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-09-04 13:45:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:52,223 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-09-04 13:45:52,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:45:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-09-04 13:45:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 13:45:52,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:52,229 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:52,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:52,431 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 1 times [2020-09-04 13:45:52,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:52,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125790844] [2020-09-04 13:45:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:52,442 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:45:52,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615590717] [2020-09-04 13:45:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:45:52,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-04 13:45:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 13:45:52,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125790844] [2020-09-04 13:45:52,571 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:45:52,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615590717] [2020-09-04 13:45:52,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:45:52,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 13:45:52,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885981308] [2020-09-04 13:45:52,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:45:52,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:52,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:45:52,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:45:52,573 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-09-04 13:45:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:52,686 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-09-04 13:45:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:45:52,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-09-04 13:45:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:52,689 INFO L225 Difference]: With dead ends: 54 [2020-09-04 13:45:52,689 INFO L226 Difference]: Without dead ends: 52 [2020-09-04 13:45:52,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:45:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-04 13:45:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-04 13:45:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 13:45:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-09-04 13:45:52,703 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 32 [2020-09-04 13:45:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:52,703 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-09-04 13:45:52,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:45:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-09-04 13:45:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:45:52,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:52,705 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:52,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:52,921 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:52,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2069437160, now seen corresponding path program 2 times [2020-09-04 13:45:52,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:52,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028066922] [2020-09-04 13:45:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:52,931 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:45:52,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705876549] [2020-09-04 13:45:52,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:52,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:45:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:45:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-04 13:45:52,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 13:45:53,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028066922] [2020-09-04 13:45:53,032 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:45:53,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705876549] [2020-09-04 13:45:53,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:45:53,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 13:45:53,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831918137] [2020-09-04 13:45:53,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:45:53,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:53,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:45:53,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:45:53,034 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-09-04 13:45:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:53,133 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-09-04 13:45:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:45:53,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-09-04 13:45:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:53,135 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:45:53,135 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 13:45:53,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:45:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 13:45:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-04 13:45:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-04 13:45:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-09-04 13:45:53,147 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2020-09-04 13:45:53,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:53,147 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-09-04 13:45:53,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:45:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-09-04 13:45:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:45:53,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:53,149 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:53,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:53,366 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash -121404966, now seen corresponding path program 3 times [2020-09-04 13:45:53,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:53,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525020981] [2020-09-04 13:45:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:53,379 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:45:53,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171963905] [2020-09-04 13:45:53,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:53,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-04 13:45:53,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:45:53,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-04 13:45:53,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-04 13:45:53,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525020981] [2020-09-04 13:45:53,521 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:45:53,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171963905] [2020-09-04 13:45:53,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:45:53,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 13:45:53,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400933067] [2020-09-04 13:45:53,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:45:53,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:45:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:45:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:45:53,523 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 7 states. [2020-09-04 13:45:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:45:53,700 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-09-04 13:45:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:45:53,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-09-04 13:45:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:45:53,702 INFO L225 Difference]: With dead ends: 71 [2020-09-04 13:45:53,705 INFO L226 Difference]: Without dead ends: 69 [2020-09-04 13:45:53,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:45:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-04 13:45:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-09-04 13:45:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-04 13:45:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-09-04 13:45:53,734 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2020-09-04 13:45:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:45:53,734 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-09-04 13:45:53,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:45:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-09-04 13:45:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 13:45:53,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:45:53,737 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:45:53,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:45:53,938 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:45:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:45:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 4 times [2020-09-04 13:45:53,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:45:53,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478783174] [2020-09-04 13:45:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:45:53,955 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:45:53,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272150838] [2020-09-04 13:45:53,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:45:54,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:45:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:45:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2020-09-04 13:45:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:45:57,820 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 19 [2020-09-04 13:46:12,271 WARN L193 SmtUtils]: Spent 8.27 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-09-04 13:46:12,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:46:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 5 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-09-04 13:46:12,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478783174] [2020-09-04 13:46:12,410 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:46:12,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272150838] [2020-09-04 13:46:12,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:46:12,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 13:46:12,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498132006] [2020-09-04 13:46:12,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:46:12,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:46:12,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:46:12,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=83, Unknown=3, NotChecked=0, Total=110 [2020-09-04 13:46:12,415 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 11 states. [2020-09-04 13:46:22,139 WARN L193 SmtUtils]: Spent 9.69 s on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-09-04 13:46:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:46:31,202 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-09-04 13:46:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:46:31,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-09-04 13:46:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:46:31,209 INFO L225 Difference]: With dead ends: 72 [2020-09-04 13:46:31,209 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:46:31,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=42, Invalid=137, Unknown=3, NotChecked=0, Total=182 [2020-09-04 13:46:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:46:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:46:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:46:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:46:31,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2020-09-04 13:46:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:46:31,213 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:46:31,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:46:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:46:31,213 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:46:31,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:46:31,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:46:38,256 WARN L193 SmtUtils]: Spent 6.71 s on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2020-09-04 13:46:43,255 WARN L193 SmtUtils]: Spent 4.99 s on a formula simplification that was a NOOP. DAG size: 27 [2020-09-04 13:46:54,029 WARN L193 SmtUtils]: Spent 10.77 s on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-09-04 13:47:00,376 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2020-09-04 13:47:11,446 WARN L193 SmtUtils]: Spent 11.07 s on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-09-04 13:47:22,491 WARN L193 SmtUtils]: Spent 11.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-09-04 13:47:31,176 WARN L193 SmtUtils]: Spent 8.68 s on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2020-09-04 13:47:31,179 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:47:31,179 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:47:31,179 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:47:31,180 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:47:31,180 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:47:31,180 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:47:31,180 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-09-04 13:47:31,180 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-09-04 13:47:31,180 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-09-04 13:47:31,180 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-09-04 13:47:31,181 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2020-09-04 13:47:31,181 INFO L268 CegarLoopResult]: For program point L29(lines 26 38) no Hoare annotation was computed. [2020-09-04 13:47:31,182 INFO L264 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (let ((.cse3 (div (+ main_~t~0 (- 1)) 2))) (let ((.cse0 (* main_~t~0 2)) (.cse1 (+ (* main_~t~0 main_~t~0) 1)) (.cse2 (* .cse3 .cse3))) (and (= (+ .cse0 (* (* main_~a~0 main_~a~0) 4)) .cse1) (= (+ (* .cse2 4) .cse0) .cse1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (+ (* .cse3 2) .cse2 1))))) [2020-09-04 13:47:31,182 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~a~0))) (and (= (+ (* main_~t~0 2) (* .cse0 4)) (+ (* main_~t~0 main_~t~0) 1)) (= main_~s~0 (+ main_~t~0 .cse0)) (= (+ (* main_~a~0 2) 1) main_~t~0))) [2020-09-04 13:47:31,182 INFO L264 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~a~0))) (and (= (+ (* main_~t~0 2) (* .cse0 4)) (+ (* main_~t~0 main_~t~0) 1)) (= main_~s~0 (+ main_~t~0 .cse0)) (= (+ (* main_~a~0 2) 1) main_~t~0))) [2020-09-04 13:47:31,182 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2020-09-04 13:47:31,182 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 38) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~a~0))) (and (= (+ (* main_~t~0 2) (* .cse0 4)) (+ (* main_~t~0 main_~t~0) 1)) (= main_~s~0 (+ main_~t~0 .cse0)) (= (+ (* main_~a~0 2) 1) main_~t~0))) [2020-09-04 13:47:31,182 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 38) the Hoare annotation is: (let ((.cse3 (div (+ main_~t~0 (- 1)) 2))) (let ((.cse0 (* main_~t~0 2)) (.cse1 (+ (* main_~t~0 main_~t~0) 1)) (.cse2 (* .cse3 .cse3))) (and (= (+ .cse0 (* (* main_~a~0 main_~a~0) 4)) .cse1) (= (+ (* .cse2 4) .cse0) .cse1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (+ (* .cse3 2) .cse2 1))))) [2020-09-04 13:47:31,182 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2020-09-04 13:47:31,183 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-04 13:47:31,183 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (let ((.cse3 (div (+ main_~t~0 (- 1)) 2))) (let ((.cse0 (* main_~t~0 2)) (.cse1 (+ (* main_~t~0 main_~t~0) 1)) (.cse2 (* .cse3 .cse3))) (and (= (+ .cse0 (* (* main_~a~0 main_~a~0) 4)) .cse1) (= (+ (* .cse2 4) .cse0) .cse1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (+ (* .cse3 2) .cse2 1))))) [2020-09-04 13:47:31,183 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (let ((.cse3 (div (+ main_~t~0 (- 1)) 2))) (let ((.cse0 (* main_~t~0 2)) (.cse1 (+ (* main_~t~0 main_~t~0) 1)) (.cse2 (* .cse3 .cse3))) (and (= (+ .cse0 (* (* main_~a~0 main_~a~0) 4)) .cse1) (= (+ (* .cse2 4) .cse0) .cse1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (+ (* .cse3 2) .cse2 1))))) [2020-09-04 13:47:31,183 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-09-04 13:47:31,183 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-09-04 13:47:31,183 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-09-04 13:47:31,183 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:47:31,183 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-09-04 13:47:31,183 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-09-04 13:47:31,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:47:31 BoogieIcfgContainer [2020-09-04 13:47:31,203 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:47:31,206 INFO L168 Benchmark]: Toolchain (without parser) took 101404.01 ms. Allocated memory was 141.0 MB in the beginning and 243.3 MB in the end (delta: 102.2 MB). Free memory was 104.2 MB in the beginning and 155.7 MB in the end (delta: -51.4 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:47:31,207 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:47:31,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.72 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:47:31,208 INFO L168 Benchmark]: Boogie Preprocessor took 154.68 ms. Allocated memory was 141.0 MB in the beginning and 206.6 MB in the end (delta: 65.5 MB). Free memory was 94.3 MB in the beginning and 184.7 MB in the end (delta: -90.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:47:31,209 INFO L168 Benchmark]: RCFGBuilder took 347.07 ms. Allocated memory is still 206.6 MB. Free memory was 184.7 MB in the beginning and 172.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:47:31,210 INFO L168 Benchmark]: TraceAbstraction took 100542.17 ms. Allocated memory was 206.6 MB in the beginning and 243.3 MB in the end (delta: 36.7 MB). Free memory was 171.7 MB in the beginning and 155.7 MB in the end (delta: 16.0 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:47:31,214 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 354.72 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 154.68 ms. Allocated memory was 141.0 MB in the beginning and 206.6 MB in the end (delta: 65.5 MB). Free memory was 94.3 MB in the beginning and 184.7 MB in the end (delta: -90.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.07 ms. Allocated memory is still 206.6 MB. Free memory was 184.7 MB in the beginning and 172.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 100542.17 ms. Allocated memory was 206.6 MB in the beginning and 243.3 MB in the end (delta: 36.7 MB). Free memory was 171.7 MB in the beginning and 155.7 MB in the end (delta: 16.0 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (t * 2 + a * a * 4 == t * t + 1 && s == t + a * a) && a * 2 + 1 == t - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 40.6s, OverallIterations: 8, TraceHistogramMax: 9, AutomataDifference: 19.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 59.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 205 SDtfs, 55 SDslu, 554 SDs, 0 SdLazy, 328 SolverSat, 55 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 28.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 40 PreInvPairs, 67 NumberOfFragments, 367 HoareAnnotationTreeSize, 40 FomulaSimplifications, 790 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 345 FormulaSimplificationTreeSizeReductionInter, 59.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 227 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 219 ConstructedInterpolants, 0 QuantifiedInterpolants, 29576 SizeOfPredicates, 19 NumberOfNonLiveVariables, 434 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 326/349 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...