/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:34:49,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:34:49,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:34:49,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:34:49,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:34:49,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:34:49,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:34:49,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:34:49,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:34:49,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:34:49,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:34:49,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:34:49,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:34:49,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:34:49,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:34:49,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:34:49,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:34:49,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:34:49,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:34:49,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:34:49,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:34:49,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:34:49,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:34:49,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:34:49,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:34:49,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:34:49,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:34:49,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:34:49,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:34:49,689 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:34:49,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:34:49,691 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:34:49,691 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:34:49,691 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:34:49,692 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:34:49,692 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:34:49,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:34:49,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:34:49,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:34:49,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:34:49,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:34:49,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:34:49,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:34:49,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:34:49,693 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:34:49,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:34:49,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:34:49,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:34:49,694 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:34:49,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:34:49,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:34:49,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:34:49,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:34:49,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:34:49,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:34:49,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:34:49,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:34:49,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:34:49,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:34:50,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:34:50,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:34:50,028 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:34:50,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:34:50,031 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:34:50,032 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-07 11:34:50,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2507a700e/5086513c9f664fc4827bd73387b8cbba/FLAG631dcef5b [2020-07-07 11:34:50,634 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:34:50,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-07 11:34:50,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2507a700e/5086513c9f664fc4827bd73387b8cbba/FLAG631dcef5b [2020-07-07 11:34:50,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2507a700e/5086513c9f664fc4827bd73387b8cbba [2020-07-07 11:34:50,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:34:50,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:34:50,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:50,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:34:50,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:34:51,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:50" (1/1) ... [2020-07-07 11:34:51,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98b2117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51, skipping insertion in model container [2020-07-07 11:34:51,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:50" (1/1) ... [2020-07-07 11:34:51,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:34:51,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:34:51,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:51,261 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:34:51,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:51,305 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:34:51,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51 WrapperNode [2020-07-07 11:34:51,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:51,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:34:51,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:34:51,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:34:51,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... [2020-07-07 11:34:51,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... [2020-07-07 11:34:51,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... [2020-07-07 11:34:51,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... [2020-07-07 11:34:51,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... [2020-07-07 11:34:51,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... [2020-07-07 11:34:51,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... [2020-07-07 11:34:51,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:34:51,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:34:51,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:34:51,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:34:51,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:34:51,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:34:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:34:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:34:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:34:51,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:34:51,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:34:51,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:34:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:34:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:34:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:34:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:34:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:34:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:34:51,784 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:34:51,784 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:34:51,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:51 BoogieIcfgContainer [2020-07-07 11:34:51,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:34:51,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:34:51,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:34:51,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:34:51,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:34:50" (1/3) ... [2020-07-07 11:34:51,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2b3574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:51, skipping insertion in model container [2020-07-07 11:34:51,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:51" (2/3) ... [2020-07-07 11:34:51,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2b3574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:51, skipping insertion in model container [2020-07-07 11:34:51,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:51" (3/3) ... [2020-07-07 11:34:51,799 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-07-07 11:34:51,813 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:34:51,821 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:34:51,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:34:51,884 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:34:51,884 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:34:51,884 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:34:51,884 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:34:51,885 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:34:51,885 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:34:51,886 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:34:51,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:34:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-07 11:34:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:34:51,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:51,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:51,921 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-07-07 11:34:51,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:51,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408470710] [2020-07-07 11:34:51,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:52,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408470710] [2020-07-07 11:34:52,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:52,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 11:34:52,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603345294] [2020-07-07 11:34:52,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:34:52,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:34:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:34:52,120 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-07 11:34:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:52,154 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-07-07 11:34:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:34:52,156 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-07 11:34:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:52,166 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:34:52,167 INFO L226 Difference]: Without dead ends: 19 [2020-07-07 11:34:52,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:34:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-07 11:34:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-07 11:34:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-07 11:34:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-07-07 11:34:52,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-07-07 11:34:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:52,218 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-07-07 11:34:52,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:34:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-07-07 11:34:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:34:52,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:52,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:52,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:34:52,220 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1082567597, now seen corresponding path program 1 times [2020-07-07 11:34:52,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:52,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064622482] [2020-07-07 11:34:52,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:52,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064622482] [2020-07-07 11:34:52,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:52,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:34:52,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115119990] [2020-07-07 11:34:52,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:34:52,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:34:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:34:52,372 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2020-07-07 11:34:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:52,472 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-07-07 11:34:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:34:52,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-07 11:34:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:52,475 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:34:52,475 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:34:52,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:34:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:34:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:34:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-07 11:34:52,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-07-07 11:34:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:52,492 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-07 11:34:52,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:34:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-07 11:34:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 11:34:52,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:52,493 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:52,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:34:52,494 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-07-07 11:34:52,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:52,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506198165] [2020-07-07 11:34:52,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:52,508 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:52,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458309201] [2020-07-07 11:34:52,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:52,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:34:52,558 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:52,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506198165] [2020-07-07 11:34:52,638 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:52,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458309201] [2020-07-07 11:34:52,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:52,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:34:52,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715432769] [2020-07-07 11:34:52,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:34:52,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:34:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:34:52,642 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-07-07 11:34:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:52,741 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-07-07 11:34:52,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:34:52,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-07 11:34:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:52,744 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:34:52,744 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 11:34:52,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 11:34:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-07 11:34:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-07 11:34:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-07 11:34:52,761 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-07-07 11:34:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:52,761 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-07 11:34:52,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:34:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-07 11:34:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:34:52,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:52,763 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:52,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:34:52,979 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-07-07 11:34:52,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:52,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927054828] [2020-07-07 11:34:52,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:52,997 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:52,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018635603] [2020-07-07 11:34:52,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:53,048 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:34:53,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:34:53,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927054828] [2020-07-07 11:34:53,090 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:53,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018635603] [2020-07-07 11:34:53,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:53,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:34:53,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781693427] [2020-07-07 11:34:53,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:34:53,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:53,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:34:53,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:34:53,093 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-07-07 11:34:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:53,177 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-07-07 11:34:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:34:53,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-07 11:34:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:53,180 INFO L225 Difference]: With dead ends: 41 [2020-07-07 11:34:53,181 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:34:53,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:34:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:34:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:34:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-07 11:34:53,195 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-07-07 11:34:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:53,196 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-07 11:34:53,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:34:53,196 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-07 11:34:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-07 11:34:53,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:53,198 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:53,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:53,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 1 times [2020-07-07 11:34:53,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:53,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457863492] [2020-07-07 11:34:53,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:53,426 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:53,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343303227] [2020-07-07 11:34:53,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:53,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-07 11:34:53,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-07 11:34:53,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457863492] [2020-07-07 11:34:53,580 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:53,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343303227] [2020-07-07 11:34:53,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:53,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-07 11:34:53,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069446522] [2020-07-07 11:34:53,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:34:53,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:53,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:34:53,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:53,585 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-07-07 11:34:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:53,738 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-07 11:34:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:34:53,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-07-07 11:34:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:53,742 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:34:53,742 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 11:34:53,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:34:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 11:34:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-07 11:34:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:34:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-07-07 11:34:53,758 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 32 [2020-07-07 11:34:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:53,759 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-07-07 11:34:53,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:34:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-07-07 11:34:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:34:53,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:53,761 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:53,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:53,976 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:53,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2069437160, now seen corresponding path program 2 times [2020-07-07 11:34:53,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:53,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842911468] [2020-07-07 11:34:53,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:53,985 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:53,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135854960] [2020-07-07 11:34:53,986 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:54,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:34:54,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:34:54,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 11:34:54,031 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:34:54,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842911468] [2020-07-07 11:34:54,079 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:54,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135854960] [2020-07-07 11:34:54,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:54,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-07 11:34:54,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380509763] [2020-07-07 11:34:54,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:34:54,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:54,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:34:54,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:54,082 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-07-07 11:34:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:54,190 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-07-07 11:34:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:34:54,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-07-07 11:34:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:54,192 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:34:54,192 INFO L226 Difference]: Without dead ends: 53 [2020-07-07 11:34:54,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:34:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-07 11:34:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-07 11:34:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 11:34:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-07-07 11:34:54,206 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2020-07-07 11:34:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:54,206 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-07-07 11:34:54,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:34:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-07-07 11:34:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:34:54,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:54,208 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:54,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:54,424 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:54,425 INFO L82 PathProgramCache]: Analyzing trace with hash -121404966, now seen corresponding path program 3 times [2020-07-07 11:34:54,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:54,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012423588] [2020-07-07 11:34:54,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:54,439 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:54,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333559824] [2020-07-07 11:34:54,440 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:54,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 11:34:54,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:34:54,516 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-07 11:34:54,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-07 11:34:54,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012423588] [2020-07-07 11:34:54,653 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:54,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333559824] [2020-07-07 11:34:54,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:54,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-07 11:34:54,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094271294] [2020-07-07 11:34:54,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:34:54,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:54,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:34:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:34:54,658 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 7 states. [2020-07-07 11:34:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:54,890 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-07-07 11:34:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:34:54,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-07-07 11:34:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:54,898 INFO L225 Difference]: With dead ends: 71 [2020-07-07 11:34:54,899 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 11:34:54,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:34:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 11:34:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-07-07 11:34:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-07 11:34:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-07-07 11:34:54,927 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 49 [2020-07-07 11:34:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:54,928 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-07-07 11:34:54,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:34:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-07-07 11:34:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 11:34:54,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:54,934 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:55,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:34:55,150 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 4 times [2020-07-07 11:34:55,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:55,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423250498] [2020-07-07 11:34:55,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:55,160 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:55,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389344757] [2020-07-07 11:34:55,161 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-07 11:34:55,229 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:34:55,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:34:55,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-07 11:34:55,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:57,408 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:35:13,081 WARN L193 SmtUtils]: Spent 8.20 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-07 11:35:13,086 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:35:36,042 WARN L193 SmtUtils]: Spent 9.43 s on a formula simplification that was a NOOP. DAG size: 29 [2020-07-07 11:35:38,102 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:35:46,349 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~t~0_BEFORE_CALL_21 Int)) (let ((.cse0 (div (+ v_main_~t~0_BEFORE_CALL_21 (- 1)) 2))) (and (= v_main_~t~0_BEFORE_CALL_21 (+ (* 2 .cse0) 1)) (not (= (+ (* 4 (* .cse0 .cse0)) (* 8 .cse0) 3) (+ (* 2 v_main_~t~0_BEFORE_CALL_21) (* v_main_~t~0_BEFORE_CALL_21 v_main_~t~0_BEFORE_CALL_21))))))) is different from false [2020-07-07 11:35:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 64 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-07 11:35:46,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423250498] [2020-07-07 11:35:46,380 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:35:46,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389344757] [2020-07-07 11:35:46,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:35:46,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-07 11:35:46,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028771619] [2020-07-07 11:35:46,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:35:46,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:35:46,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:35:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=70, Unknown=3, NotChecked=16, Total=110 [2020-07-07 11:35:46,383 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 11 states. [2020-07-07 11:35:54,993 WARN L193 SmtUtils]: Spent 8.52 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-07 11:35:59,380 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 32 DAG size of output: 3 [2020-07-07 11:36:04,010 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 38 DAG size of output: 6 [2020-07-07 11:36:51,451 WARN L193 SmtUtils]: Spent 31.76 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-07 11:37:08,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:37:08,460 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-07-07 11:37:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:37:08,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-07 11:37:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:37:08,520 INFO L225 Difference]: With dead ends: 74 [2020-07-07 11:37:08,520 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:37:08,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 93.2s TimeCoverageRelationStatistics Valid=49, Invalid=156, Unknown=9, NotChecked=26, Total=240 [2020-07-07 11:37:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:37:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:37:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:37:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:37:08,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2020-07-07 11:37:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:37:08,523 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:37:08,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:37:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:37:08,523 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:37:08,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:37:08,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:37:19,715 WARN L193 SmtUtils]: Spent 10.83 s on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-07-07 11:37:30,770 WARN L193 SmtUtils]: Spent 11.05 s on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-07-07 11:37:41,567 WARN L193 SmtUtils]: Spent 10.78 s on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-07-07 11:37:54,612 WARN L193 SmtUtils]: Spent 13.00 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-07-07 11:37:54,823 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2020-07-07 11:37:54,826 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:37:54,826 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:37:54,826 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:37:54,827 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:37:54,827 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:37:54,827 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:37:54,827 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-07-07 11:37:54,827 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-07 11:37:54,827 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-07 11:37:54,827 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-07 11:37:54,827 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2020-07-07 11:37:54,827 INFO L268 CegarLoopResult]: For program point L29(lines 26 38) no Hoare annotation was computed. [2020-07-07 11:37:54,828 INFO L264 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (and (= main_~s~0 (+ (* main_~a~0 main_~a~0) main_~t~0)) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (let ((.cse0 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse0 2) (* .cse0 .cse0) 1)))) [2020-07-07 11:37:54,828 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (+ (* 2 main_~a~0) 1))) (and (<= main_~t~0 .cse0) (<= .cse0 main_~t~0) (= main_~s~0 (+ (* main_~a~0 main_~a~0) main_~t~0)))) [2020-07-07 11:37:54,828 INFO L264 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~s~0 (+ (* main_~a~0 main_~a~0) main_~t~0)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2020-07-07 11:37:54,828 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2020-07-07 11:37:54,828 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 38) the Hoare annotation is: (let ((.cse0 (+ (* 2 main_~a~0) 1))) (and (<= main_~t~0 .cse0) (<= .cse0 main_~t~0) (= main_~s~0 (+ (* main_~a~0 main_~a~0) main_~t~0)))) [2020-07-07 11:37:54,829 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 38) the Hoare annotation is: (and (= main_~s~0 (+ (* main_~a~0 main_~a~0) main_~t~0)) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (let ((.cse0 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse0 2) (* .cse0 .cse0) 1)))) [2020-07-07 11:37:54,829 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2020-07-07 11:37:54,829 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-07 11:37:54,829 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~s~0 (+ (* main_~a~0 main_~a~0) main_~t~0)) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (let ((.cse0 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse0 2) (* .cse0 .cse0) 1)))) [2020-07-07 11:37:54,829 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (and (= main_~s~0 (+ (* main_~a~0 main_~a~0) main_~t~0)) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 (let ((.cse0 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse0 2) (* .cse0 .cse0) 1)))) [2020-07-07 11:37:54,829 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-07 11:37:54,829 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-07 11:37:54,829 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-07 11:37:54,830 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:37:54,830 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:37:54,830 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-07 11:37:54,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:37:54 BoogieIcfgContainer [2020-07-07 11:37:54,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:37:54,850 INFO L168 Benchmark]: Toolchain (without parser) took 183856.38 ms. Allocated memory was 137.9 MB in the beginning and 246.4 MB in the end (delta: 108.5 MB). Free memory was 102.6 MB in the beginning and 163.6 MB in the end (delta: -61.0 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:37:54,851 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:37:54,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.30 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:37:54,853 INFO L168 Benchmark]: Boogie Preprocessor took 162.84 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 92.7 MB in the beginning and 183.7 MB in the end (delta: -91.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:37:54,854 INFO L168 Benchmark]: RCFGBuilder took 318.48 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 170.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:37:54,855 INFO L168 Benchmark]: TraceAbstraction took 183056.62 ms. Allocated memory was 204.5 MB in the beginning and 246.4 MB in the end (delta: 41.9 MB). Free memory was 170.1 MB in the beginning and 163.6 MB in the end (delta: 6.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:37:54,859 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.30 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 92.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.84 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 92.7 MB in the beginning and 183.7 MB in the end (delta: -91.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.48 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 170.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 183056.62 ms. Allocated memory was 204.5 MB in the beginning and 246.4 MB in the end (delta: 41.9 MB). Free memory was 170.1 MB in the beginning and 163.6 MB in the end (delta: 6.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (t <= 2 * a + 1 && 2 * a + 1 <= t) && s == a * a + t - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 136.8s, OverallIterations: 8, TraceHistogramMax: 9, AutomataDifference: 83.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 46.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 205 SDtfs, 58 SDslu, 567 SDs, 0 SdLazy, 325 SolverSat, 51 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 21.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 93.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 40 PreInvPairs, 67 NumberOfFragments, 212 HoareAnnotationTreeSize, 40 FomulaSimplifications, 976 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 409 FormulaSimplificationTreeSizeReductionInter, 45.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 51.7s InterpolantComputationTime, 227 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 219 ConstructedInterpolants, 3 QuantifiedInterpolants, 32794 SizeOfPredicates, 18 NumberOfNonLiveVariables, 434 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 324/349 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...