/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/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 12:59:45,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 12:59:45,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 12:59:45,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 12:59:45,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 12:59:45,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 12:59:45,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 12:59:45,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 12:59:45,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 12:59:45,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 12:59:45,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 12:59:45,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 12:59:45,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 12:59:45,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 12:59:45,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 12:59:45,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 12:59:45,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 12:59:45,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 12:59:45,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 12:59:45,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 12:59:45,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 12:59:45,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 12:59:45,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 12:59:45,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 12:59:45,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 12:59:45,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 12:59:45,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 12:59:45,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 12:59:45,735 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 12:59:45,779 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 12:59:45,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 12:59:45,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 12:59:45,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 12:59:45,782 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 12:59:45,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 12:59:45,782 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 12:59:45,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 12:59:45,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 12:59:45,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 12:59:45,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 12:59:45,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 12:59:45,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 12:59:45,785 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 12:59:45,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 12:59:45,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 12:59:45,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 12:59:45,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 12:59:45,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 12:59:45,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 12:59:45,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 12:59:45,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 12:59:45,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 12:59:45,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 12:59:45,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 12:59:45,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 12:59:45,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 12:59:45,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 12:59:45,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 12:59:45,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 12:59:46,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 12:59:46,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 12:59:46,219 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 12:59:46,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 12:59:46,221 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 12:59:46,223 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-09-04 12:59:46,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/234341c72/4b14efe7141d446e9302ecdba6a82323/FLAG8a9134c2a [2020-09-04 12:59:46,825 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 12:59:46,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/gcd_4.c [2020-09-04 12:59:46,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/234341c72/4b14efe7141d446e9302ecdba6a82323/FLAG8a9134c2a [2020-09-04 12:59:47,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/234341c72/4b14efe7141d446e9302ecdba6a82323 [2020-09-04 12:59:47,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 12:59:47,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 12:59:47,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 12:59:47,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 12:59:47,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 12:59:47,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2baf6fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47, skipping insertion in model container [2020-09-04 12:59:47,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 12:59:47,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 12:59:47,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 12:59:47,445 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 12:59:47,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 12:59:47,477 INFO L208 MainTranslator]: Completed translation [2020-09-04 12:59:47,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47 WrapperNode [2020-09-04 12:59:47,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 12:59:47,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 12:59:47,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 12:59:47,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 12:59:47,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (1/1) ... [2020-09-04 12:59:47,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 12:59:47,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 12:59:47,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 12:59:47,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 12:59:47,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (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 12:59:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 12:59:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 12:59:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 12:59:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-09-04 12:59:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 12:59:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 12:59:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 12:59:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 12:59:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-09-04 12:59:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 12:59:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 12:59:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 12:59:47,902 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 12:59:47,902 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 12:59:47,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 12:59:47 BoogieIcfgContainer [2020-09-04 12:59:47,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 12:59:47,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 12:59:47,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 12:59:47,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 12:59:47,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 12:59:47" (1/3) ... [2020-09-04 12:59:47,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4976f698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 12:59:47, skipping insertion in model container [2020-09-04 12:59:47,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 12:59:47" (2/3) ... [2020-09-04 12:59:47,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4976f698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 12:59:47, skipping insertion in model container [2020-09-04 12:59:47,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 12:59:47" (3/3) ... [2020-09-04 12:59:47,916 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-09-04 12:59:47,927 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 12:59:47,937 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 12:59:47,959 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 12:59:47,990 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 12:59:47,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 12:59:47,990 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 12:59:47,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 12:59:47,990 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 12:59:47,991 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 12:59:47,991 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 12:59:47,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 12:59:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-04 12:59:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-04 12:59:48,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:48,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:48,023 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-09-04 12:59:48,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:48,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242998809] [2020-09-04 12:59:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:48,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 12:59:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:48,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 12:59:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:48,289 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 12:59:48,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242998809] [2020-09-04 12:59:48,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 12:59:48,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 12:59:48,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710302001] [2020-09-04 12:59:48,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 12:59:48,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:48,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 12:59:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 12:59:48,320 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-09-04 12:59:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:48,432 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-09-04 12:59:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 12:59:48,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-09-04 12:59:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:48,463 INFO L225 Difference]: With dead ends: 55 [2020-09-04 12:59:48,463 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 12:59:48,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 12:59:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 12:59:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-09-04 12:59:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 12:59:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-09-04 12:59:48,518 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-09-04 12:59:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:48,518 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-09-04 12:59:48,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 12:59:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-09-04 12:59:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-04 12:59:48,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:48,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:48,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 12:59:48,521 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-09-04 12:59:48,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:48,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622306081] [2020-09-04 12:59:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:48,536 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 12:59:48,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885085336] [2020-09-04 12:59:48,536 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 12:59:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 12:59:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:48,702 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 12:59:48,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622306081] [2020-09-04 12:59:48,707 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 12:59:48,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885085336] [2020-09-04 12:59:48,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 12:59:48,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 12:59:48,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416715675] [2020-09-04 12:59:48,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 12:59:48,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 12:59:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 12:59:48,710 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-09-04 12:59:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:48,789 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-09-04 12:59:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 12:59:48,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-04 12:59:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:48,791 INFO L225 Difference]: With dead ends: 47 [2020-09-04 12:59:48,791 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 12:59:48,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 12:59:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 12:59:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-09-04 12:59:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 12:59:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-09-04 12:59:48,800 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-09-04 12:59:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:48,801 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-09-04 12:59:48,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 12:59:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-09-04 12:59:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 12:59:48,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:48,802 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:49,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 12:59:49,017 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:49,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1158269966, now seen corresponding path program 1 times [2020-09-04 12:59:49,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:49,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221455541] [2020-09-04 12:59:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:49,035 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 12:59:49,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146398106] [2020-09-04 12:59:49,036 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 12:59:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 12:59:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:49,147 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 12:59:49,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221455541] [2020-09-04 12:59:49,147 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 12:59:49,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146398106] [2020-09-04 12:59:49,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 12:59:49,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 12:59:49,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730845445] [2020-09-04 12:59:49,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 12:59:49,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 12:59:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 12:59:49,151 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-09-04 12:59:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:49,214 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-09-04 12:59:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 12:59:49,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-04 12:59:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:49,215 INFO L225 Difference]: With dead ends: 46 [2020-09-04 12:59:49,216 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 12:59:49,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 12:59:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 12:59:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-09-04 12:59:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 12:59:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-09-04 12:59:49,223 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-09-04 12:59:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:49,223 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-09-04 12:59:49,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 12:59:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-09-04 12:59:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 12:59:49,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:49,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:49,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:49,433 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:49,434 INFO L82 PathProgramCache]: Analyzing trace with hash -457205388, now seen corresponding path program 1 times [2020-09-04 12:59:49,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:49,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387581991] [2020-09-04 12:59:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:49,446 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 12:59:49,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128082543] [2020-09-04 12:59:49,447 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 12:59:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:49,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 12:59:49,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:49,515 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 12:59:49,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387581991] [2020-09-04 12:59:49,516 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 12:59:49,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128082543] [2020-09-04 12:59:49,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 12:59:49,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 12:59:49,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016832822] [2020-09-04 12:59:49,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 12:59:49,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:49,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 12:59:49,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 12:59:49,518 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-09-04 12:59:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:49,554 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-09-04 12:59:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 12:59:49,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-04 12:59:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:49,556 INFO L225 Difference]: With dead ends: 40 [2020-09-04 12:59:49,556 INFO L226 Difference]: Without dead ends: 27 [2020-09-04 12:59:49,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 12:59:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-04 12:59:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-04 12:59:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 12:59:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-09-04 12:59:49,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-09-04 12:59:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:49,563 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-09-04 12:59:49,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 12:59:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-09-04 12:59:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 12:59:49,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:49,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:49,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:49,778 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1431348209, now seen corresponding path program 1 times [2020-09-04 12:59:49,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:49,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31057706] [2020-09-04 12:59:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:49,792 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 12:59:49,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961251970] [2020-09-04 12:59:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 12:59:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:49,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31057706] [2020-09-04 12:59:49,892 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 12:59:49,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961251970] [2020-09-04 12:59:49,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 12:59:49,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 12:59:49,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41908381] [2020-09-04 12:59:49,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 12:59:49,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:49,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 12:59:49,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 12:59:49,895 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-09-04 12:59:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:49,986 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-09-04 12:59:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 12:59:49,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-04 12:59:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:49,988 INFO L225 Difference]: With dead ends: 46 [2020-09-04 12:59:49,988 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 12:59:49,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 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 12:59:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 12:59:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-04 12:59:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-04 12:59:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-04 12:59:49,994 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-09-04 12:59:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:49,995 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-04 12:59:49,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 12:59:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-04 12:59:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 12:59:49,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:49,996 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:50,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:50,206 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:50,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1537894100, now seen corresponding path program 1 times [2020-09-04 12:59:50,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:50,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086522791] [2020-09-04 12:59:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:50,219 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 12:59:50,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414105007] [2020-09-04 12:59:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-09-04 12:59:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-04 12:59:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:50,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086522791] [2020-09-04 12:59:50,385 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 12:59:50,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414105007] [2020-09-04 12:59:50,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 12:59:50,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 12:59:50,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103904513] [2020-09-04 12:59:50,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 12:59:50,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:50,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 12:59:50,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 12:59:50,387 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-09-04 12:59:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:50,497 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-09-04 12:59:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 12:59:50,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-04 12:59:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:50,499 INFO L225 Difference]: With dead ends: 48 [2020-09-04 12:59:50,499 INFO L226 Difference]: Without dead ends: 31 [2020-09-04 12:59:50,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 12:59:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-04 12:59:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-04 12:59:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 12:59:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-04 12:59:50,508 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-09-04 12:59:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:50,508 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-04 12:59:50,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 12:59:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-04 12:59:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 12:59:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:50,509 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:50,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 12:59:50,713 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -849280247, now seen corresponding path program 2 times [2020-09-04 12:59:50,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:50,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606998645] [2020-09-04 12:59:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:50,726 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 12:59:50,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341584641] [2020-09-04 12:59:50,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:50,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 12:59:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 12:59:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 12:59:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:50,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606998645] [2020-09-04 12:59:50,872 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 12:59:50,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341584641] [2020-09-04 12:59:50,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 12:59:50,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 12:59:50,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025963145] [2020-09-04 12:59:50,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 12:59:50,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:50,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 12:59:50,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 12:59:50,875 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-09-04 12:59:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:51,003 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-09-04 12:59:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 12:59:51,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-04 12:59:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:51,005 INFO L225 Difference]: With dead ends: 50 [2020-09-04 12:59:51,005 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 12:59:51,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-04 12:59:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 12:59:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 12:59:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 12:59:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-04 12:59:51,012 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2020-09-04 12:59:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:51,012 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-04 12:59:51,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 12:59:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-04 12:59:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 12:59:51,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:51,014 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:51,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:51,227 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -516331098, now seen corresponding path program 3 times [2020-09-04 12:59:51,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:51,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590010990] [2020-09-04 12:59:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:51,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 12:59:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:51,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 12:59:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:51,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590010990] [2020-09-04 12:59:51,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386816742] [2020-09-04 12:59:51,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:51,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-04 12:59:51,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 12:59:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-04 12:59:51,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:51,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 12:59:51,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-09-04 12:59:51,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822381074] [2020-09-04 12:59:51,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 12:59:51,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 12:59:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 12:59:51,612 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 14 states. [2020-09-04 12:59:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:51,812 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-09-04 12:59:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 12:59:51,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-09-04 12:59:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:51,814 INFO L225 Difference]: With dead ends: 52 [2020-09-04 12:59:51,814 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 12:59:51,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-09-04 12:59:51,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 12:59:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-04 12:59:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 12:59:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-04 12:59:51,820 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-09-04 12:59:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:51,821 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-04 12:59:51,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 12:59:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-04 12:59:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 12:59:51,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:51,822 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:52,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:52,037 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1878386625, now seen corresponding path program 4 times [2020-09-04 12:59:52,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:52,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070580278] [2020-09-04 12:59:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:52,057 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 12:59:52,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872215544] [2020-09-04 12:59:52,058 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:52,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 12:59:52,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 12:59:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-04 12:59:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 12:59:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:52,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070580278] [2020-09-04 12:59:52,317 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 12:59:52,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872215544] [2020-09-04 12:59:52,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 12:59:52,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 12:59:52,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239331682] [2020-09-04 12:59:52,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 12:59:52,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 12:59:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 12:59:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-04 12:59:52,319 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 15 states. [2020-09-04 12:59:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 12:59:52,659 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-09-04 12:59:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 12:59:52,659 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-09-04 12:59:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 12:59:52,660 INFO L225 Difference]: With dead ends: 52 [2020-09-04 12:59:52,661 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 12:59:52,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-09-04 12:59:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 12:59:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-09-04 12:59:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 12:59:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-09-04 12:59:52,681 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 29 [2020-09-04 12:59:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 12:59:52,681 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-09-04 12:59:52,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 12:59:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-09-04 12:59:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 12:59:52,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 12:59:52,683 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 12:59:52,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 12:59:52,887 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 12:59:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 12:59:52,888 INFO L82 PathProgramCache]: Analyzing trace with hash 841482334, now seen corresponding path program 5 times [2020-09-04 12:59:52,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 12:59:52,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631526419] [2020-09-04 12:59:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 12:59:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:52,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 12:59:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:52,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 12:59:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 12:59:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 12:59:53,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631526419] [2020-09-04 12:59:53,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069059420] [2020-09-04 12:59:53,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 12:59:53,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-04 12:59:53,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 12:59:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-04 12:59:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:00:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:00:00,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:00:00,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-09-04 13:00:00,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370565309] [2020-09-04 13:00:00,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 13:00:00,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:00:00,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 13:00:00,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=398, Unknown=4, NotChecked=0, Total=462 [2020-09-04 13:00:00,856 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 22 states. [2020-09-04 13:00:35,479 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification that was a NOOP. DAG size: 51 [2020-09-04 13:00:41,415 WARN L193 SmtUtils]: Spent 3.73 s on a formula simplification that was a NOOP. DAG size: 46 [2020-09-04 13:00:46,579 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-09-04 13:00:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:00:54,148 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-09-04 13:00:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:00:54,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-09-04 13:00:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:00:54,149 INFO L225 Difference]: With dead ends: 79 [2020-09-04 13:00:54,149 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:00:54,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=140, Invalid=836, Unknown=16, NotChecked=0, Total=992 [2020-09-04 13:00:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:00:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-04 13:00:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 13:00:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-09-04 13:00:54,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 31 [2020-09-04 13:00:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:00:54,157 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-09-04 13:00:54,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 13:00:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-09-04 13:00:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:00:54,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:00:54,159 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:00:54,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:00:54,360 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:00:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:00:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1492674782, now seen corresponding path program 6 times [2020-09-04 13:00:54,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:00:54,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288547169] [2020-09-04 13:00:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:00:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:54,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:00:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:54,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:00:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-04 13:00:54,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288547169] [2020-09-04 13:00:54,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:00:54,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:00:54,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008585397] [2020-09-04 13:00:54,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:00:54,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:00:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:00:54,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:00:54,413 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 3 states. [2020-09-04 13:00:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:00:54,424 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-09-04 13:00:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:00:54,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-04 13:00:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:00:54,427 INFO L225 Difference]: With dead ends: 60 [2020-09-04 13:00:54,427 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 13:00:54,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:00:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 13:00:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-04 13:00:54,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 13:00:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 13:00:54,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 31 [2020-09-04 13:00:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:00:54,434 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 13:00:54,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:00:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 13:00:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:00:54,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:00:54,435 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:00:54,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 13:00:54,435 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:00:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:00:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1099647772, now seen corresponding path program 7 times [2020-09-04 13:00:54,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:00:54,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046327603] [2020-09-04 13:00:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:00:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:54,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:00:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:54,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:00:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:00:54,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046327603] [2020-09-04 13:00:54,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592624442] [2020-09-04 13:00:54,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:00:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-04 13:00:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:00:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:00:54,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:00:54,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2020-09-04 13:00:54,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224741225] [2020-09-04 13:00:54,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:00:54,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:00:54,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:00:54,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:00:54,982 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 18 states. [2020-09-04 13:00:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:00:55,558 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2020-09-04 13:00:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:00:55,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-09-04 13:00:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:00:55,562 INFO L225 Difference]: With dead ends: 73 [2020-09-04 13:00:55,562 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 13:00:55,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-09-04 13:00:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 13:00:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-04 13:00:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-04 13:00:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-09-04 13:00:55,569 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2020-09-04 13:00:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:00:55,570 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-09-04 13:00:55,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:00:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-09-04 13:00:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 13:00:55,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:00:55,571 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:00:55,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:00:55,785 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:00:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:00:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash -202245895, now seen corresponding path program 8 times [2020-09-04 13:00:55,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:00:55,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194372398] [2020-09-04 13:00:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:00:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:55,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:00:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:55,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:00:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:00:56,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194372398] [2020-09-04 13:00:56,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482690491] [2020-09-04 13:00:56,063 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:00:56,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:00:56,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:00:56,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-04 13:00:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:00:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:00:56,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:00:56,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-09-04 13:00:56,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826236074] [2020-09-04 13:00:56,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 13:00:56,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:00:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 13:00:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:00:56,641 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 23 states. [2020-09-04 13:00:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:00:57,970 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-09-04 13:00:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 13:00:57,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 33 [2020-09-04 13:00:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:00:57,973 INFO L225 Difference]: With dead ends: 80 [2020-09-04 13:00:57,973 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:00:57,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 13:00:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:00:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-04 13:00:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 13:00:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2020-09-04 13:00:57,986 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 33 [2020-09-04 13:00:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:00:57,986 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2020-09-04 13:00:57,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 13:00:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2020-09-04 13:00:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 13:00:57,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:00:57,990 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:00:58,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-04 13:00:58,205 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:00:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:00:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -825201876, now seen corresponding path program 1 times [2020-09-04 13:00:58,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:00:58,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033536166] [2020-09-04 13:00:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:00:58,214 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:00:58,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154611547] [2020-09-04 13:00:58,214 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:00:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:00:58,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-04 13:00:58,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:00:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:00:58,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033536166] [2020-09-04 13:00:58,466 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:00:58,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154611547] [2020-09-04 13:00:58,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:00:58,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 13:00:58,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678056967] [2020-09-04 13:00:58,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:00:58,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:00:58,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:00:58,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:00:58,469 INFO L87 Difference]: Start difference. First operand 35 states and 34 transitions. Second operand 12 states. [2020-09-04 13:00:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:00:58,818 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2020-09-04 13:00:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:00:58,820 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-09-04 13:00:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:00:58,820 INFO L225 Difference]: With dead ends: 35 [2020-09-04 13:00:58,820 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:00:58,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:00:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:00:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:00:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:00:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:00:58,822 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-09-04 13:00:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:00:58,822 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:00:58,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:00:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:00:58,822 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:00:59,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-04 13:00:59,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:00:59,664 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 58 [2020-09-04 13:00:59,670 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:00:59,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:00:59,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:00:59,670 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:00:59,670 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:00:59,670 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:00:59,671 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2020-09-04 13:00:59,671 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2020-09-04 13:00:59,671 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-04 13:00:59,671 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (<= main_~y~0 18) (<= 18 main_~y~0) (= main_~x~0 63) (= main_~x~0 (* main_~g~0 7))) [2020-09-04 13:00:59,671 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= 63 (+ main_~g~0 (* main_~y~0 3))) (= main_~x~0 63) (= main_~x~0 (* main_~g~0 7))) [2020-09-04 13:00:59,672 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2020-09-04 13:00:59,672 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (= 63 (+ main_~g~0 (* main_~y~0 3))) (= main_~x~0 63) (= main_~x~0 (* main_~g~0 7))) [2020-09-04 13:00:59,672 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (= main_~y~0 18) (= main_~x~0 63)) [2020-09-04 13:00:59,672 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-09-04 13:00:59,672 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-09-04 13:00:59,672 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-09-04 13:00:59,672 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-09-04 13:00:59,673 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-09-04 13:00:59,673 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-09-04 13:00:59,673 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-09-04 13:00:59,673 INFO L268 CegarLoopResult]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2020-09-04 13:00:59,673 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2020-09-04 13:00:59,673 INFO L268 CegarLoopResult]: For program point L13-1(lines 11 27) no Hoare annotation was computed. [2020-09-04 13:00:59,673 INFO L271 CegarLoopResult]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2020-09-04 13:00:59,674 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-09-04 13:00:59,674 INFO L264 CegarLoopResult]: At program point L20-2(lines 19 25) the Hoare annotation is: (let ((.cse1 (<= gcd_test_~b |gcd_test_#in~b|)) (.cse2 (<= |gcd_test_#in~b| gcd_test_~b)) (.cse4 (* 7 |gcd_test_#in~b|)) (.cse3 (* 2 |gcd_test_#in~a|)) (.cse6 (* gcd_test_~b 3)) (.cse5 (= (+ gcd_test_~a (* |gcd_test_#in~b| 3)) |gcd_test_#in~a|))) (or (let ((.cse0 (+ gcd_test_~b gcd_test_~a))) (and (<= .cse0 |gcd_test_#in~a|) .cse1 .cse2 (<= |gcd_test_#in~a| .cse0))) (<= (+ .cse3 1) .cse4) (and (<= |gcd_test_#in~a| gcd_test_~a) (<= |gcd_test_#in~a| 0)) (and .cse5 (= (+ .cse6 (* gcd_test_~a 7)) |gcd_test_#in~a|)) (<= |gcd_test_#in~a| |gcd_test_#in~b|) (and .cse5 .cse2 (<= (+ (* 3 gcd_test_~b) gcd_test_~a) |gcd_test_#in~a|)) (and (= gcd_test_~a |gcd_test_#in~a|) .cse1 .cse2) (and (= |gcd_test_#in~a| (+ (* gcd_test_~b 2) gcd_test_~a)) .cse1 .cse2) (and (<= (+ (* 21 |gcd_test_#in~b|) 1) (+ (* 2 gcd_test_~b) (* 6 |gcd_test_#in~a|))) (<= (+ .cse4 1) .cse3)) (and (= |gcd_test_#in~a| (+ .cse6 (* gcd_test_~a 4))) .cse5))) [2020-09-04 13:00:59,674 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-04 13:00:59,674 INFO L268 CegarLoopResult]: For program point L12-2(lines 11 27) no Hoare annotation was computed. [2020-09-04 13:00:59,674 INFO L268 CegarLoopResult]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2020-09-04 13:00:59,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:00:59 BoogieIcfgContainer [2020-09-04 13:00:59,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:00:59,725 INFO L168 Benchmark]: Toolchain (without parser) took 72534.03 ms. Allocated memory was 110.1 MB in the beginning and 260.0 MB in the end (delta: 149.9 MB). Free memory was 75.8 MB in the beginning and 152.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 73.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:00:59,726 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 110.1 MB. Free memory was 93.4 MB in the beginning and 93.3 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. [2020-09-04 13:00:59,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.19 ms. Allocated memory was 110.1 MB in the beginning and 123.2 MB in the end (delta: 13.1 MB). Free memory was 75.6 MB in the beginning and 101.1 MB in the end (delta: -25.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:00:59,733 INFO L168 Benchmark]: Boogie Preprocessor took 106.15 ms. Allocated memory was 123.2 MB in the beginning and 159.4 MB in the end (delta: 36.2 MB). Free memory was 101.1 MB in the beginning and 145.5 MB in the end (delta: -44.4 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:00:59,734 INFO L168 Benchmark]: RCFGBuilder took 311.98 ms. Allocated memory is still 159.4 MB. Free memory was 145.5 MB in the beginning and 132.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:00:59,734 INFO L168 Benchmark]: TraceAbstraction took 71812.30 ms. Allocated memory was 159.4 MB in the beginning and 260.0 MB in the end (delta: 100.7 MB). Free memory was 132.0 MB in the beginning and 152.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:00:59,740 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 110.1 MB. Free memory was 93.4 MB in the beginning and 93.3 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.19 ms. Allocated memory was 110.1 MB in the beginning and 123.2 MB in the end (delta: 13.1 MB). Free memory was 75.6 MB in the beginning and 101.1 MB in the end (delta: -25.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.15 ms. Allocated memory was 123.2 MB in the beginning and 159.4 MB in the end (delta: 36.2 MB). Free memory was 101.1 MB in the beginning and 145.5 MB in the end (delta: -44.4 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.98 ms. Allocated memory is still 159.4 MB. Free memory was 145.5 MB in the beginning and 132.5 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 71812.30 ms. Allocated memory was 159.4 MB in the beginning and 260.0 MB in the end (delta: 100.7 MB). Free memory was 132.0 MB in the beginning and 152.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 19]: Loop Invariant Derived loop invariant: (((((((((((b + a <= \old(a) && b <= \old(b)) && \old(b) <= b) && \old(a) <= b + a) || 2 * \old(a) + 1 <= 7 * \old(b)) || (\old(a) <= a && \old(a) <= 0)) || (a + \old(b) * 3 == \old(a) && b * 3 + a * 7 == \old(a))) || \old(a) <= \old(b)) || ((a + \old(b) * 3 == \old(a) && \old(b) <= b) && 3 * b + a <= \old(a))) || ((a == \old(a) && b <= \old(b)) && \old(b) <= b)) || ((\old(a) == b * 2 + a && b <= \old(b)) && \old(b) <= b)) || (21 * \old(b) + 1 <= 2 * b + 6 * \old(a) && 7 * \old(b) + 1 <= 2 * \old(a))) || (\old(a) == b * 3 + a * 4 && a + \old(b) * 3 == \old(a)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 71.0s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 56.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 307 SDtfs, 259 SDslu, 1779 SDs, 0 SdLazy, 1982 SolverSat, 105 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 20.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 417 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 45.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=9, 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, 14 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 49 PreInvPairs, 90 NumberOfFragments, 196 HoareAnnotationTreeSize, 49 FomulaSimplifications, 1290 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 390 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 479 NumberOfCodeBlocks, 479 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 461 ConstructedInterpolants, 11 QuantifiedInterpolants, 80153 SizeOfPredicates, 42 NumberOfNonLiveVariables, 732 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 48/376 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...