/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 0.2.0-b8ad66e [2020-10-23 18:52:11,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:52:11,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:52:11,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:52:11,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:52:11,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:52:11,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:52:11,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:52:11,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:52:11,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:52:11,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:52:11,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:52:11,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:52:11,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:52:11,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:52:11,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:52:11,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:52:11,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:52:11,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:52:11,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:52:11,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:52:11,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:52:11,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:52:11,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:52:11,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:52:11,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:52:11,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:52:11,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:52:11,782 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 [2020-10-23 18:52:11,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:52:11,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:52:11,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:52:11,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:52:11,840 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:52:11,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:52:11,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:52:11,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:52:11,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:52:11,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:52:11,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:52:11,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:52:11,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:52:11,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:52:11,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:52:11,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:52:11,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:52:11,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:52:11,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:52:11,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:52:11,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:52:11,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:52:11,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:52:11,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:52:11,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:52:11,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:52:11,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:52:11,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:52:11,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:52:11,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:52:12,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:52:12,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:52:12,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:52:12,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:52:12,295 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:52:12,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-10-23 18:52:12,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9e2bbdf/be31a1a66eb14b43afa8bb81b138bea1/FLAG8289c9cde [2020-10-23 18:52:13,193 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:52:13,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-10-23 18:52:13,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9e2bbdf/be31a1a66eb14b43afa8bb81b138bea1/FLAG8289c9cde [2020-10-23 18:52:13,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9e2bbdf/be31a1a66eb14b43afa8bb81b138bea1 [2020-10-23 18:52:13,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:52:13,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:52:13,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:52:13,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:52:13,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:52:13,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448cae16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13, skipping insertion in model container [2020-10-23 18:52:13,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:52:13,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:52:13,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:52:13,900 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:52:13,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:52:13,945 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:52:13,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13 WrapperNode [2020-10-23 18:52:13,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:52:13,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:52:13,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:52:13,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:52:13,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (1/1) ... [2020-10-23 18:52:13,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:52:13,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:52:13,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:52:13,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:52:13,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (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 [2020-10-23 18:52:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:52:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:52:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:52:14,064 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:52:14,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:52:14,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:52:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:52:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:52:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:52:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:52:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:52:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:52:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:52:14,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:52:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:52:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:52:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:52:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:52:14,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:52:14,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:52:14,412 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:52:14,413 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:52:14,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:52:14 BoogieIcfgContainer [2020-10-23 18:52:14,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:52:14,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:52:14,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:52:14,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:52:14,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:52:13" (1/3) ... [2020-10-23 18:52:14,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b4f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:52:14, skipping insertion in model container [2020-10-23 18:52:14,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:52:13" (2/3) ... [2020-10-23 18:52:14,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40b4f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:52:14, skipping insertion in model container [2020-10-23 18:52:14,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:52:14" (3/3) ... [2020-10-23 18:52:14,446 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-10-23 18:52:14,476 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:52:14,489 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:52:14,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:52:14,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:52:14,562 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:52:14,562 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:52:14,562 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:52:14,562 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:52:14,562 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:52:14,562 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:52:14,562 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:52:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-23 18:52:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:52:14,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:14,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:14,589 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:14,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2016387697, now seen corresponding path program 1 times [2020-10-23 18:52:14,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:14,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175192883] [2020-10-23 18:52:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:14,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:52:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:52:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175192883] [2020-10-23 18:52:14,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:52:14,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:52:14,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528928149] [2020-10-23 18:52:14,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:52:14,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:14,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:52:14,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:52:14,895 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-23 18:52:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:15,032 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2020-10-23 18:52:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:52:15,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-23 18:52:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:15,044 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:52:15,045 INFO L226 Difference]: Without dead ends: 21 [2020-10-23 18:52:15,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:52:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-23 18:52:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-23 18:52:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 18:52:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-10-23 18:52:15,106 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2020-10-23 18:52:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:15,107 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-10-23 18:52:15,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:52:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-10-23 18:52:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:52:15,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:15,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:15,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:52:15,110 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2068104873, now seen corresponding path program 1 times [2020-10-23 18:52:15,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:15,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630140004] [2020-10-23 18:52:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:15,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:52:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:52:15,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630140004] [2020-10-23 18:52:15,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:52:15,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:52:15,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32098421] [2020-10-23 18:52:15,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:52:15,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:15,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:52:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:52:15,279 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 6 states. [2020-10-23 18:52:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:15,689 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-23 18:52:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:52:15,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-23 18:52:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:15,691 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:52:15,691 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 18:52:15,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:52:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 18:52:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-23 18:52:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:52:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2020-10-23 18:52:15,711 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 12 [2020-10-23 18:52:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:15,711 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-10-23 18:52:15,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:52:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2020-10-23 18:52:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:52:15,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:15,714 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:15,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:52:15,714 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:15,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:15,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1759663618, now seen corresponding path program 1 times [2020-10-23 18:52:15,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:15,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489180355] [2020-10-23 18:52:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:15,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:15,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36991561] [2020-10-23 18:52:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:15,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:52:15,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:52:15,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489180355] [2020-10-23 18:52:15,950 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:15,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36991561] [2020-10-23 18:52:15,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:52:15,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:52:15,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932756148] [2020-10-23 18:52:15,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:52:15,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:52:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:52:15,957 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand 5 states. [2020-10-23 18:52:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:16,048 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-10-23 18:52:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:52:16,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-23 18:52:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:16,054 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:52:16,055 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:52:16,056 INFO L677 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 [2020-10-23 18:52:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:52:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-23 18:52:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:52:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-10-23 18:52:16,085 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2020-10-23 18:52:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:16,086 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-10-23 18:52:16,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:52:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-10-23 18:52:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:52:16,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:16,089 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:16,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:52:16,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash 365647497, now seen corresponding path program 1 times [2020-10-23 18:52:16,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:16,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381322261] [2020-10-23 18:52:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:16,330 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:16,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619745140] [2020-10-23 18:52:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:16,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:52:16,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:52:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381322261] [2020-10-23 18:52:16,457 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:16,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619745140] [2020-10-23 18:52:16,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:52:16,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:52:16,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610329548] [2020-10-23 18:52:16,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:52:16,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:16,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:52:16,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:52:16,461 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2020-10-23 18:52:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:16,525 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-23 18:52:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:52:16,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-23 18:52:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:16,527 INFO L225 Difference]: With dead ends: 44 [2020-10-23 18:52:16,527 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:52:16,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:52:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:52:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:52:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:52:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-23 18:52:16,540 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 22 [2020-10-23 18:52:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:16,540 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-23 18:52:16,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:52:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-23 18:52:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:52:16,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:16,542 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:16,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:16,756 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash 610682596, now seen corresponding path program 1 times [2020-10-23 18:52:16,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:16,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234070080] [2020-10-23 18:52:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:16,783 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:16,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830562688] [2020-10-23 18:52:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:16,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 18:52:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:52:16,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234070080] [2020-10-23 18:52:16,891 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:16,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830562688] [2020-10-23 18:52:16,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:16,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-23 18:52:16,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081391392] [2020-10-23 18:52:16,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:52:16,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:16,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:52:16,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:52:16,894 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-23 18:52:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:16,984 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-23 18:52:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:52:16,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-23 18:52:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:16,987 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:52:16,987 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:52:16,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:52:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:52:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-23 18:52:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 18:52:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-23 18:52:17,001 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 29 [2020-10-23 18:52:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:17,002 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-23 18:52:17,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:52:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-23 18:52:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:52:17,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:17,003 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:17,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:17,219 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:17,220 INFO L82 PathProgramCache]: Analyzing trace with hash 492749479, now seen corresponding path program 2 times [2020-10-23 18:52:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:17,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219224128] [2020-10-23 18:52:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:17,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:17,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386447871] [2020-10-23 18:52:17,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:17,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:52:17,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:52:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 18:52:17,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:52:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219224128] [2020-10-23 18:52:17,374 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386447871] [2020-10-23 18:52:17,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:17,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-23 18:52:17,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267078161] [2020-10-23 18:52:17,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:52:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:17,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:52:17,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:52:17,376 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 6 states. [2020-10-23 18:52:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:17,497 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-23 18:52:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:52:17,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-23 18:52:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:17,501 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:52:17,501 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 18:52:17,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:52:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 18:52:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-23 18:52:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:52:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-23 18:52:17,515 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2020-10-23 18:52:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:17,516 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-23 18:52:17,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:52:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-23 18:52:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:52:17,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:17,518 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:17,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:17,733 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash 868354308, now seen corresponding path program 3 times [2020-10-23 18:52:17,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:17,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576265558] [2020-10-23 18:52:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:17,748 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420904034] [2020-10-23 18:52:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:17,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 18:52:17,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:52:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 18:52:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:52:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576265558] [2020-10-23 18:52:17,857 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:17,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420904034] [2020-10-23 18:52:17,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:17,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-23 18:52:17,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017724788] [2020-10-23 18:52:17,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:52:17,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:17,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:52:17,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:52:17,859 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 6 states. [2020-10-23 18:52:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:17,951 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-23 18:52:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:52:17,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-23 18:52:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:17,953 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:52:17,953 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 18:52:17,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:52:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 18:52:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-23 18:52:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 18:52:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-23 18:52:17,966 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 39 [2020-10-23 18:52:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:17,966 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-23 18:52:17,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:52:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-23 18:52:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 18:52:17,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:17,968 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:18,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:52:18,182 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1303561, now seen corresponding path program 4 times [2020-10-23 18:52:18,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:18,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578070281] [2020-10-23 18:52:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:18,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:18,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731596328] [2020-10-23 18:52:18,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:18,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:52:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:52:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:52:18,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-23 18:52:18,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578070281] [2020-10-23 18:52:18,314 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:18,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731596328] [2020-10-23 18:52:18,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:18,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:52:18,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724842822] [2020-10-23 18:52:18,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:52:18,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:18,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:52:18,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:52:18,316 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 7 states. [2020-10-23 18:52:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:18,411 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-10-23 18:52:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:52:18,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-23 18:52:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:18,413 INFO L225 Difference]: With dead ends: 62 [2020-10-23 18:52:18,413 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:52:18,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:52:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:52:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:52:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:52:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-23 18:52:18,426 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 46 [2020-10-23 18:52:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:18,426 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-23 18:52:18,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:52:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-23 18:52:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:52:18,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:18,428 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:18,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:18,643 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1378970462, now seen corresponding path program 5 times [2020-10-23 18:52:18,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:18,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578212489] [2020-10-23 18:52:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:18,654 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:18,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325428395] [2020-10-23 18:52:18,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 18:52:18,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-23 18:52:18,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:52:18,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 18:52:18,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-23 18:52:18,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578212489] [2020-10-23 18:52:18,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:18,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325428395] [2020-10-23 18:52:18,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:18,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:52:18,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048284642] [2020-10-23 18:52:18,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:52:18,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:52:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:52:18,848 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 7 states. [2020-10-23 18:52:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:19,037 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-10-23 18:52:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:52:19,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-23 18:52:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:19,040 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:52:19,040 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:52:19,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:52:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:52:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-23 18:52:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-23 18:52:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-23 18:52:19,055 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 51 [2020-10-23 18:52:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:19,055 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-23 18:52:19,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:52:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-23 18:52:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-23 18:52:19,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:19,057 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:19,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:19,263 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash -505594903, now seen corresponding path program 6 times [2020-10-23 18:52:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:19,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795797308] [2020-10-23 18:52:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:19,276 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:19,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899313098] [2020-10-23 18:52:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 18:52:19,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-23 18:52:19,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:52:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 18:52:19,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-23 18:52:19,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795797308] [2020-10-23 18:52:19,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:19,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899313098] [2020-10-23 18:52:19,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:19,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:52:19,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444145064] [2020-10-23 18:52:19,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:52:19,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:52:19,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:52:19,498 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 7 states. [2020-10-23 18:52:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:19,670 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-23 18:52:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:52:19,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-23 18:52:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:19,675 INFO L225 Difference]: With dead ends: 78 [2020-10-23 18:52:19,675 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 18:52:19,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:52:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 18:52:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-23 18:52:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 18:52:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-23 18:52:19,697 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 56 [2020-10-23 18:52:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:19,697 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-23 18:52:19,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:52:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-23 18:52:19,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 18:52:19,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:19,705 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:19,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:52:19,920 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash -35416057, now seen corresponding path program 7 times [2020-10-23 18:52:19,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:19,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983419057] [2020-10-23 18:52:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:19,934 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:19,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537175002] [2020-10-23 18:52:19,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-23 18:52:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:52:20,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:52:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-23 18:52:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983419057] [2020-10-23 18:52:20,112 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:20,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537175002] [2020-10-23 18:52:20,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:20,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-23 18:52:20,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4879994] [2020-10-23 18:52:20,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:52:20,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:52:20,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:52:20,115 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 8 states. [2020-10-23 18:52:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:20,406 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2020-10-23 18:52:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:52:20,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-23 18:52:20,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:20,408 INFO L225 Difference]: With dead ends: 91 [2020-10-23 18:52:20,408 INFO L226 Difference]: Without dead ends: 88 [2020-10-23 18:52:20,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:52:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-23 18:52:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-23 18:52:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-23 18:52:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2020-10-23 18:52:20,425 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 68 [2020-10-23 18:52:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:20,425 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2020-10-23 18:52:20,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:52:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2020-10-23 18:52:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 18:52:20,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:20,427 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:20,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:20,641 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash 566988708, now seen corresponding path program 8 times [2020-10-23 18:52:20,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:20,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575080394] [2020-10-23 18:52:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:20,654 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304211630] [2020-10-23 18:52:20,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-23 18:52:20,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:52:20,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:52:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:52:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-23 18:52:20,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575080394] [2020-10-23 18:52:20,846 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:20,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304211630] [2020-10-23 18:52:20,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:20,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-23 18:52:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849819794] [2020-10-23 18:52:20,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:52:20,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:52:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:52:20,848 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand 8 states. [2020-10-23 18:52:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:21,046 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-10-23 18:52:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:52:21,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-23 18:52:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:21,048 INFO L225 Difference]: With dead ends: 95 [2020-10-23 18:52:21,048 INFO L226 Difference]: Without dead ends: 89 [2020-10-23 18:52:21,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:52:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-23 18:52:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-23 18:52:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 18:52:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2020-10-23 18:52:21,065 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 73 [2020-10-23 18:52:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:21,065 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2020-10-23 18:52:21,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:52:21,066 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2020-10-23 18:52:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-23 18:52:21,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:52:21,067 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:52:21,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:52:21,283 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:52:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:52:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2107845442, now seen corresponding path program 9 times [2020-10-23 18:52:21,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:52:21,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938092658] [2020-10-23 18:52:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:52:21,296 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:52:21,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987707975] [2020-10-23 18:52:21,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-23 18:52:21,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:52:21,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:52:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 18:52:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:52:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-10-23 18:52:21,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938092658] [2020-10-23 18:52:21,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:21,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987707975] [2020-10-23 18:52:21,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:21,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-23 18:52:21,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3017423] [2020-10-23 18:52:21,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:52:21,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:21,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:52:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:52:21,529 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 8 states. [2020-10-23 18:52:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:52:28,004 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-10-23 18:52:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:52:28,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-23 18:52:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:52:28,008 INFO L225 Difference]: With dead ends: 89 [2020-10-23 18:52:28,008 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:52:28,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:52:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:52:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:52:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:52:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:52:28,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2020-10-23 18:52:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:52:28,013 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:52:28,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:52:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:52:28,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:52:28,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:52:28,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:52:36,835 WARN L193 SmtUtils]: Spent 8.32 s on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2020-10-23 18:52:45,363 WARN L193 SmtUtils]: Spent 8.50 s on a formula simplification. DAG size of input: 71 DAG size of output: 21 [2020-10-23 18:52:54,227 WARN L193 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-10-23 18:52:54,381 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-10-23 18:53:03,192 WARN L193 SmtUtils]: Spent 8.78 s on a formula simplification. DAG size of input: 41 DAG size of output: 21 [2020-10-23 18:53:11,835 WARN L193 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 70 DAG size of output: 21 [2020-10-23 18:53:11,838 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2020-10-23 18:53:11,839 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 5) the Hoare annotation is: true [2020-10-23 18:53:11,839 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2020-10-23 18:53:11,839 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-23 18:53:11,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:53:11,839 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:53:11,839 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:53:11,840 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:53:11,840 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:53:11,840 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:53:11,840 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:53:11,840 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2020-10-23 18:53:11,841 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-23 18:53:11,841 INFO L274 CegarLoopResult]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2020-10-23 18:53:11,841 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2020-10-23 18:53:11,841 INFO L274 CegarLoopResult]: For program point L31(lines 28 40) no Hoare annotation was computed. [2020-10-23 18:53:11,842 INFO L270 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (* main_~s~0 4))) (and (= .cse0 (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= .cse0 (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0))) [2020-10-23 18:53:11,842 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 20 47) the Hoare annotation is: true [2020-10-23 18:53:11,842 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2020-10-23 18:53:11,842 INFO L270 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (let ((.cse0 (* main_~s~0 4))) (and (= .cse0 (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= .cse0 (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0))) [2020-10-23 18:53:11,842 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 40) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2020-10-23 18:53:11,843 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 40) the Hoare annotation is: (let ((.cse0 (* main_~s~0 4))) (and (= .cse0 (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= .cse0 (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0))) [2020-10-23 18:53:11,843 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 20 47) no Hoare annotation was computed. [2020-10-23 18:53:11,843 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 20 47) no Hoare annotation was computed. [2020-10-23 18:53:11,843 INFO L274 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-10-23 18:53:11,843 INFO L270 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (or (and (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1))) (let ((.cse0 (* main_~s~0 4))) (and (= .cse0 (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= .cse0 (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)))) [2020-10-23 18:53:11,843 INFO L270 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 (* main_~s~0 4))) (and (= .cse0 (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= .cse0 (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0))) [2020-10-23 18:53:11,844 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2020-10-23 18:53:11,844 INFO L270 CegarLoopResult]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:53:11,844 INFO L274 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2020-10-23 18:53:11,844 INFO L274 CegarLoopResult]: For program point L12-1(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:53:11,844 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:53:11,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:53:11 BoogieIcfgContainer [2020-10-23 18:53:11,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:53:11,878 INFO L168 Benchmark]: Toolchain (without parser) took 58320.95 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 125.3 MB in the beginning and 96.0 MB in the end (delta: 29.3 MB). Peak memory consumption was 100.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:53:11,879 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:53:11,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.91 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 115.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:53:11,885 INFO L168 Benchmark]: Boogie Preprocessor took 40.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:53:11,885 INFO L168 Benchmark]: RCFGBuilder took 430.50 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 100.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:53:11,886 INFO L168 Benchmark]: TraceAbstraction took 57443.99 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 99.9 MB in the beginning and 96.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 73.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:53:11,897 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 385.91 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 115.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.15 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 113.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 430.50 ms. Allocated memory is still 151.0 MB. Free memory was 113.8 MB in the beginning and 100.3 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 57443.99 ms. Allocated memory was 151.0 MB in the beginning and 220.2 MB in the end (delta: 69.2 MB). Free memory was 99.9 MB in the beginning and 96.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 73.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 28]: Loop Invariant Derived loop invariant: s * 4 == t * t + t * 2 + 1 && a * 2 + 1 == t - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.6s, OverallIterations: 13, TraceHistogramMax: 14, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 43.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 385 SDtfs, 109 SDslu, 1286 SDs, 0 SdLazy, 790 SolverSat, 90 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 539 GetRequests, 464 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 8 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 96 PreInvPairs, 131 NumberOfFragments, 266 HoareAnnotationTreeSize, 96 FomulaSimplifications, 7832 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 14 FomulaSimplificationsInter, 2132 FormulaSimplificationTreeSizeReductionInter, 43.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 544 NumberOfCodeBlocks, 478 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 531 ConstructedInterpolants, 0 QuantifiedInterpolants, 81589 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1675 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 1221/1323 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...