/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 0.1.25-72570d3 [2020-08-22 17:02:24,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 17:02:24,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 17:02:24,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 17:02:24,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 17:02:24,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 17:02:24,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 17:02:24,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 17:02:24,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 17:02:24,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 17:02:24,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 17:02:24,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 17:02:24,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 17:02:24,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 17:02:24,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 17:02:24,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 17:02:24,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 17:02:24,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 17:02:24,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 17:02:24,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 17:02:24,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 17:02:24,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 17:02:24,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 17:02:24,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 17:02:24,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 17:02:24,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 17:02:24,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 17:02:24,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 17:02:24,612 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 [2020-08-22 17:02:24,649 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 17:02:24,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 17:02:24,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 17:02:24,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 17:02:24,652 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 17:02:24,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 17:02:24,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 17:02:24,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 17:02:24,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 17:02:24,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 17:02:24,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 17:02:24,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 17:02:24,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 17:02:24,655 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 17:02:24,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 17:02:24,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 17:02:24,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 17:02:24,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 17:02:24,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 17:02:24,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 17:02:24,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 17:02:24,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 17:02:24,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 17:02:24,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 17:02:24,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 17:02:24,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 17:02:24,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 17:02:24,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 17:02:24,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 17:02:24,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 17:02:24,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 17:02:25,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 17:02:25,020 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 17:02:25,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 17:02:25,022 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 17:02:25,023 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-08-22 17:02:25,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f0f25e6/5a13af16c0844397a7e588bad1c0321f/FLAG945792529 [2020-08-22 17:02:25,555 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 17:02:25,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-08-22 17:02:25,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f0f25e6/5a13af16c0844397a7e588bad1c0321f/FLAG945792529 [2020-08-22 17:02:25,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f0f25e6/5a13af16c0844397a7e588bad1c0321f [2020-08-22 17:02:25,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 17:02:25,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 17:02:25,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 17:02:25,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 17:02:25,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 17:02:25,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:02:25" (1/1) ... [2020-08-22 17:02:25,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a77845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:25, skipping insertion in model container [2020-08-22 17:02:25,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:02:25" (1/1) ... [2020-08-22 17:02:25,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 17:02:26,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 17:02:26,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:02:26,153 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 17:02:26,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 17:02:26,187 INFO L208 MainTranslator]: Completed translation [2020-08-22 17:02:26,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26 WrapperNode [2020-08-22 17:02:26,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 17:02:26,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 17:02:26,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 17:02:26,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 17:02:26,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (1/1) ... [2020-08-22 17:02:26,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (1/1) ... [2020-08-22 17:02:26,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (1/1) ... [2020-08-22 17:02:26,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (1/1) ... [2020-08-22 17:02:26,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (1/1) ... [2020-08-22 17:02:26,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (1/1) ... [2020-08-22 17:02:26,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (1/1) ... [2020-08-22 17:02:26,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 17:02:26,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 17:02:26,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 17:02:26,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 17:02:26,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (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 [2020-08-22 17:02:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 17:02:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 17:02:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 17:02:26,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 17:02:26,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 17:02:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 17:02:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 17:02:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 17:02:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 17:02:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 17:02:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 17:02:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 17:02:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 17:02:26,566 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 17:02:26,566 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 17:02:26,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:02:26 BoogieIcfgContainer [2020-08-22 17:02:26,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 17:02:26,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 17:02:26,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 17:02:26,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 17:02:26,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:02:25" (1/3) ... [2020-08-22 17:02:26,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca79351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:02:26, skipping insertion in model container [2020-08-22 17:02:26,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:02:26" (2/3) ... [2020-08-22 17:02:26,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca79351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:02:26, skipping insertion in model container [2020-08-22 17:02:26,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:02:26" (3/3) ... [2020-08-22 17:02:26,579 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-08-22 17:02:26,590 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 17:02:26,598 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 17:02:26,612 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 17:02:26,638 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 17:02:26,638 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 17:02:26,638 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 17:02:26,638 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 17:02:26,638 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 17:02:26,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 17:02:26,639 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 17:02:26,639 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 17:02:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 17:02:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 17:02:26,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:26,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:26,664 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:26,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-08-22 17:02:26,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:26,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766313621] [2020-08-22 17:02:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:02:26,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:02:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:02:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:02:26,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766313621] [2020-08-22 17:02:26,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:02:26,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 17:02:26,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102733766] [2020-08-22 17:02:26,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 17:02:26,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 17:02:26,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 17:02:26,818 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-08-22 17:02:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:02:26,846 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-08-22 17:02:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 17:02:26,848 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 17:02:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:02:26,858 INFO L225 Difference]: With dead ends: 43 [2020-08-22 17:02:26,858 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 17:02:26,863 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 [2020-08-22 17:02:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 17:02:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-22 17:02:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 17:02:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-08-22 17:02:26,910 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-08-22 17:02:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:02:26,910 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-08-22 17:02:26,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 17:02:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-08-22 17:02:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 17:02:26,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:26,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:26,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 17:02:26,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:26,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1082567597, now seen corresponding path program 1 times [2020-08-22 17:02:26,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:26,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457549667] [2020-08-22 17:02:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:02:27,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 17:02:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:02:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:02:27,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457549667] [2020-08-22 17:02:27,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:02:27,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:02:27,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136673015] [2020-08-22 17:02:27,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:02:27,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:02:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:02:27,043 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-08-22 17:02:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:02:27,186 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-08-22 17:02:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:02:27,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 17:02:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:02:27,189 INFO L225 Difference]: With dead ends: 25 [2020-08-22 17:02:27,190 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 17:02:27,191 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 [2020-08-22 17:02:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 17:02:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-22 17:02:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 17:02:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-22 17:02:27,204 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-08-22 17:02:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:02:27,204 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-22 17:02:27,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:02:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-22 17:02:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 17:02:27,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:27,206 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:27,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 17:02:27,206 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-08-22 17:02:27,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:27,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510379116] [2020-08-22 17:02:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:27,219 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 17:02:27,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356541521] [2020-08-22 17:02:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:02:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:02:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 17:02:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 17:02:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 17:02:27,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510379116] [2020-08-22 17:02:27,406 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 17:02:27,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356541521] [2020-08-22 17:02:27,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:02:27,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:02:27,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193975668] [2020-08-22 17:02:27,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:02:27,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:02:27,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:02:27,410 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-08-22 17:02:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:02:27,493 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-08-22 17:02:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:02:27,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-22 17:02:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:02:27,495 INFO L225 Difference]: With dead ends: 37 [2020-08-22 17:02:27,495 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 17:02:27,496 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 [2020-08-22 17:02:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 17:02:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-08-22 17:02:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 17:02:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-08-22 17:02:27,509 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-08-22 17:02:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:02:27,510 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-08-22 17:02:27,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:02:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-08-22 17:02:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 17:02:27,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:27,511 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:27,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-08-22 17:02:27,725 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-08-22 17:02:27,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:27,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502619362] [2020-08-22 17:02:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:27,745 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 17:02:27,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009836358] [2020-08-22 17:02:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:02:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:02:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 17:02:27,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 17:02:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 17:02:27,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502619362] [2020-08-22 17:02:27,837 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 17:02:27,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009836358] [2020-08-22 17:02:27,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 17:02:27,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 17:02:27,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134667618] [2020-08-22 17:02:27,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 17:02:27,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 17:02:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 17:02:27,840 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-08-22 17:02:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:02:27,906 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-08-22 17:02:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 17:02:27,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-22 17:02:27,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:02:27,909 INFO L225 Difference]: With dead ends: 41 [2020-08-22 17:02:27,909 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 17:02:27,910 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 [2020-08-22 17:02:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 17:02:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 17:02:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 17:02:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-08-22 17:02:27,922 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-08-22 17:02:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:02:27,922 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-08-22 17:02:27,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 17:02:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-08-22 17:02:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 17:02:27,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:27,924 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:28,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:02:28,138 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 1 times [2020-08-22 17:02:28,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:28,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434845058] [2020-08-22 17:02:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:28,148 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 17:02:28,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686285216] [2020-08-22 17:02:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:02:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 17:02:28,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-08-22 17:02:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 17:02:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-22 17:02:28,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434845058] [2020-08-22 17:02:28,278 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 17:02:28,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686285216] [2020-08-22 17:02:28,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 17:02:28,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 17:02:28,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371351258] [2020-08-22 17:02:28,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 17:02:28,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 17:02:28,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:02:28,280 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-08-22 17:02:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:02:28,421 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-08-22 17:02:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:02:28,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-08-22 17:02:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:02:28,425 INFO L225 Difference]: With dead ends: 54 [2020-08-22 17:02:28,425 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 17:02:28,427 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 [2020-08-22 17:02:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 17:02:28,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-22 17:02:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 17:02:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-08-22 17:02:28,454 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 32 [2020-08-22 17:02:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:02:28,455 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-08-22 17:02:28,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 17:02:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-08-22 17:02:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 17:02:28,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:28,459 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:28,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:02:28,661 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2069437160, now seen corresponding path program 2 times [2020-08-22 17:02:28,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:28,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520820543] [2020-08-22 17:02:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:28,673 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 17:02:28,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293629695] [2020-08-22 17:02:28,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-08-22 17:02:28,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 17:02:28,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 17:02:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 17:02:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 17:02:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 17:02:28,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520820543] [2020-08-22 17:02:28,777 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 17:02:28,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293629695] [2020-08-22 17:02:28,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 17:02:28,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 17:02:28,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330207695] [2020-08-22 17:02:28,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 17:02:28,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 17:02:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 17:02:28,779 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-08-22 17:02:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:02:28,880 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-22 17:02:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 17:02:28,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-08-22 17:02:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:02:28,882 INFO L225 Difference]: With dead ends: 58 [2020-08-22 17:02:28,882 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 17:02:28,883 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 [2020-08-22 17:02:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 17:02:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 17:02:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 17:02:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-08-22 17:02:28,894 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2020-08-22 17:02:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:02:28,894 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-08-22 17:02:28,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 17:02:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-08-22 17:02:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 17:02:28,896 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:28,896 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:29,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:02:29,111 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -121404966, now seen corresponding path program 3 times [2020-08-22 17:02:29,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:29,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91365303] [2020-08-22 17:02:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:29,121 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 17:02:29,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694314538] [2020-08-22 17:02:29,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-08-22 17:02:29,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 17:02:29,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 17:02:29,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2020-08-22 17:02:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 17:02:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 17:02:29,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91365303] [2020-08-22 17:02:29,237 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 17:02:29,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694314538] [2020-08-22 17:02:29,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 17:02:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 17:02:29,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059227175] [2020-08-22 17:02:29,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 17:02:29,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:29,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 17:02:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 17:02:29,239 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 7 states. [2020-08-22 17:02:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:02:29,386 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-08-22 17:02:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 17:02:29,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-08-22 17:02:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:02:29,388 INFO L225 Difference]: With dead ends: 71 [2020-08-22 17:02:29,388 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 17:02:29,393 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 [2020-08-22 17:02:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 17:02:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-08-22 17:02:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 17:02:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-08-22 17:02:29,418 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2020-08-22 17:02:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:02:29,422 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-08-22 17:02:29,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 17:02:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-08-22 17:02:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 17:02:29,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 17:02:29,424 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 17:02:29,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-08-22 17:02:29,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 17:02:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 17:02:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 4 times [2020-08-22 17:02:29,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 17:02:29,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030627195] [2020-08-22 17:02:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 17:02:29,646 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 17:02:29,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481438141] [2020-08-22 17:02:29,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 17:02:29,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 17:02:29,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 17:02:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2020-08-22 17:02:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 17:02:33,360 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 19 [2020-08-22 17:02:47,729 WARN L193 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-08-22 17:02:47,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 17:02:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 5 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-08-22 17:02:47,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030627195] [2020-08-22 17:02:47,869 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 17:02:47,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481438141] [2020-08-22 17:02:47,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 17:02:47,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 17:02:47,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288829387] [2020-08-22 17:02:47,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 17:02:47,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 17:02:47,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 17:02:47,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=83, Unknown=3, NotChecked=0, Total=110 [2020-08-22 17:02:47,872 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 11 states. [2020-08-22 17:02:56,265 WARN L193 SmtUtils]: Spent 8.36 s on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-08-22 17:03:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 17:03:04,869 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-08-22 17:03:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 17:03:04,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-08-22 17:03:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 17:03:04,874 INFO L225 Difference]: With dead ends: 72 [2020-08-22 17:03:04,875 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 17:03:04,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=42, Invalid=137, Unknown=3, NotChecked=0, Total=182 [2020-08-22 17:03:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 17:03:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 17:03:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 17:03:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 17:03:04,877 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2020-08-22 17:03:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 17:03:04,878 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 17:03:04,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 17:03:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 17:03:04,878 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 17:03:05,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 17:03:05,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 17:03:13,632 WARN L193 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2020-08-22 17:03:17,757 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 27 [2020-08-22 17:03:28,320 WARN L193 SmtUtils]: Spent 10.56 s on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-08-22 17:03:37,291 WARN L193 SmtUtils]: Spent 8.97 s on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2020-08-22 17:03:50,517 WARN L193 SmtUtils]: Spent 13.23 s on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-08-22 17:04:01,944 WARN L193 SmtUtils]: Spent 11.42 s on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-08-22 17:04:10,252 WARN L193 SmtUtils]: Spent 8.31 s on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2020-08-22 17:04:10,254 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 17:04:10,254 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 17:04:10,254 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 17:04:10,255 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 17:04:10,255 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 17:04:10,255 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 17:04:10,255 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-08-22 17:04:10,255 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-08-22 17:04:10,255 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-08-22 17:04:10,255 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-08-22 17:04:10,255 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2020-08-22 17:04:10,256 INFO L268 CegarLoopResult]: For program point L29(lines 26 38) no Hoare annotation was computed. [2020-08-22 17:04:10,256 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))))) [2020-08-22 17:04:10,256 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))) [2020-08-22 17:04:10,256 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))) [2020-08-22 17:04:10,256 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2020-08-22 17:04:10,256 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))) [2020-08-22 17:04:10,256 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))))) [2020-08-22 17:04:10,257 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2020-08-22 17:04:10,257 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-08-22 17:04:10,257 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))))) [2020-08-22 17:04:10,257 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))))) [2020-08-22 17:04:10,257 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 17:04:10,257 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-08-22 17:04:10,257 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-08-22 17:04:10,257 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 17:04:10,257 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-08-22 17:04:10,258 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-08-22 17:04:10,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:04:10 BoogieIcfgContainer [2020-08-22 17:04:10,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 17:04:10,279 INFO L168 Benchmark]: Toolchain (without parser) took 104314.04 ms. Allocated memory was 145.8 MB in the beginning and 246.4 MB in the end (delta: 100.7 MB). Free memory was 102.1 MB in the beginning and 170.9 MB in the end (delta: -68.9 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2020-08-22 17:04:10,281 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 17:04:10,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.79 ms. Allocated memory is still 145.8 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 17:04:10,284 INFO L168 Benchmark]: Boogie Preprocessor took 119.94 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 92.2 MB in the beginning and 180.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 17:04:10,290 INFO L168 Benchmark]: RCFGBuilder took 261.57 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 166.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 17:04:10,291 INFO L168 Benchmark]: TraceAbstraction took 103700.46 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 166.4 MB in the beginning and 170.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2020-08-22 17:04:10,299 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.79 ms. Allocated memory is still 145.8 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.94 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 92.2 MB in the beginning and 180.3 MB in the end (delta: -88.1 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.57 ms. Allocated memory is still 201.3 MB. Free memory was 179.2 MB in the beginning and 166.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 103700.46 ms. Allocated memory was 201.3 MB in the beginning and 246.4 MB in the end (delta: 45.1 MB). Free memory was 166.4 MB in the beginning and 170.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 40.5 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: 38.4s, OverallIterations: 8, TraceHistogramMax: 9, AutomataDifference: 17.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 65.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 205 SDtfs, 55 SDslu, 554 SDs, 0 SdLazy, 328 SolverSat, 55 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 26.8s 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, 65.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 18.6s 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...