/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:12:07,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:12:07,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:12:07,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:12:07,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:12:07,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:12:07,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:12:07,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:12:07,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:12:07,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:12:07,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:12:07,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:12:07,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:12:07,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:12:07,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:12:07,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:12:07,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:12:07,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:12:07,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:12:07,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:12:07,629 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 [2021-05-06 05:12:07,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:12:07,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:12:07,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:12:07,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:12:07,649 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:12:07,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:12:07,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:12:07,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:12:07,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:12:07,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:12:07,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:12:07,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:12:07,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:12:07,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:12:07,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:12:07,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:12:07,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:12:07,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:12:07,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:12:07,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:12:07,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:12:07,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:12:07,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:12:07,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:12:07,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:12:07,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:12:07,918 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:12:07,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c [2021-05-06 05:12:07,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fdc76ac0/06dabcefc19c4b32ac260c28747ec75e/FLAG3100170ed [2021-05-06 05:12:08,340 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:12:08,340 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c [2021-05-06 05:12:08,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fdc76ac0/06dabcefc19c4b32ac260c28747ec75e/FLAG3100170ed [2021-05-06 05:12:08,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fdc76ac0/06dabcefc19c4b32ac260c28747ec75e [2021-05-06 05:12:08,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:12:08,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:12:08,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:12:08,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:12:08,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:12:08,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116f37c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08, skipping insertion in model container [2021-05-06 05:12:08,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:12:08,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:12:08,487 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c[520,533] [2021-05-06 05:12:08,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:12:08,505 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:12:08,516 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound50.c[520,533] [2021-05-06 05:12:08,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:12:08,540 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:12:08,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08 WrapperNode [2021-05-06 05:12:08,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:12:08,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:12:08,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:12:08,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:12:08,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (1/1) ... [2021-05-06 05:12:08,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:12:08,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:12:08,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:12:08,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:12:08,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (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 [2021-05-06 05:12:08,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:12:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:12:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:12:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:12:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:12:08,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:12:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:12:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:12:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:12:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:12:08,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:12:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:12:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:12:08,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:12:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:12:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:12:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:12:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:12:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:12:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:12:08,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:12:08,903 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:12:08,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:12:08 BoogieIcfgContainer [2021-05-06 05:12:08,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:12:08,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:12:08,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:12:08,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:12:08,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:12:08" (1/3) ... [2021-05-06 05:12:08,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5941da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:12:08, skipping insertion in model container [2021-05-06 05:12:08,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:12:08" (2/3) ... [2021-05-06 05:12:08,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5941da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:12:08, skipping insertion in model container [2021-05-06 05:12:08,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:12:08" (3/3) ... [2021-05-06 05:12:08,921 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound50.c [2021-05-06 05:12:08,925 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:12:08,927 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:12:08,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:12:08,968 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:12:08,968 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:12:08,968 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:12:08,968 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:12:08,969 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:12:08,969 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:12:08,969 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:12:08,969 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:12:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:12:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:12:08,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:08,985 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:08,985 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-06 05:12:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:08,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33150424] [2021-05-06 05:12:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:09,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:12:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:09,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:12:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:12:09,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:09,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33150424] [2021-05-06 05:12:09,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33150424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:12:09,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:12:09,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:12:09,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481648898] [2021-05-06 05:12:09,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:12:09,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:12:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:12:09,195 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:12:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:09,300 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-06 05:12:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:12:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 05:12:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:09,308 INFO L225 Difference]: With dead ends: 53 [2021-05-06 05:12:09,308 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 05:12:09,311 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:12:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 05:12:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 05:12:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:12:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 05:12:09,336 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 05:12:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:09,336 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 05:12:09,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:12:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 05:12:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:12:09,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:09,338 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:09,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:12:09,338 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:09,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:09,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-06 05:12:09,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:09,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688113264] [2021-05-06 05:12:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:09,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:12:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:09,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:12:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:12:09,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688113264] [2021-05-06 05:12:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688113264] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:12:09,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:12:09,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:12:09,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388682908] [2021-05-06 05:12:09,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:12:09,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:12:09,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:12:09,455 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:12:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:09,795 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 05:12:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:12:09,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 05:12:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:09,796 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:12:09,796 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 05:12:09,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:12:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 05:12:09,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-06 05:12:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:12:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 05:12:09,806 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-06 05:12:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:09,807 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 05:12:09,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:12:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 05:12:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:12:09,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:09,807 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:09,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:12:09,808 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:09,808 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2021-05-06 05:12:09,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:09,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773955412] [2021-05-06 05:12:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:09,822 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:09,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309306658] [2021-05-06 05:12:09,822 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 [2021-05-06 05:12:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:09,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:12:09,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:09,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:12:09,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:09,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773955412] [2021-05-06 05:12:09,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:09,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309306658] [2021-05-06 05:12:09,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309306658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:12:09,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:12:09,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:12:09,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290196834] [2021-05-06 05:12:09,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:12:09,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:12:09,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:12:09,981 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:12:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:10,045 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:12:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:12:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:12:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:10,048 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:12:10,048 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 05:12:10,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:12:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 05:12:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 05:12:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:12:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-05-06 05:12:10,066 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2021-05-06 05:12:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:10,066 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-05-06 05:12:10,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:12:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-05-06 05:12:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 05:12:10,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:10,068 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:10,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 05:12:10,285 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:10,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2021-05-06 05:12:10,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:10,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579494880] [2021-05-06 05:12:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:10,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:10,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983612305] [2021-05-06 05:12:10,297 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 [2021-05-06 05:12:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:12:10,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:10,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:12:10,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:10,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579494880] [2021-05-06 05:12:10,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:10,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983612305] [2021-05-06 05:12:10,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983612305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:12:10,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:12:10,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:12:10,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19741980] [2021-05-06 05:12:10,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:12:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:12:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:12:10,481 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:12:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:10,510 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-05-06 05:12:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:12:10,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 05:12:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:10,511 INFO L225 Difference]: With dead ends: 48 [2021-05-06 05:12:10,511 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 05:12:10,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:12:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 05:12:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 05:12:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:12:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-06 05:12:10,517 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2021-05-06 05:12:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:10,517 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-06 05:12:10,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:12:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-06 05:12:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 05:12:10,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:10,518 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:10,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:12:10,733 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2021-05-06 05:12:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:10,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224411276] [2021-05-06 05:12:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:10,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:10,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407214282] [2021-05-06 05:12:10,741 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 [2021-05-06 05:12:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:10,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:12:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:10,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:12:10,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:10,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224411276] [2021-05-06 05:12:10,870 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:10,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407214282] [2021-05-06 05:12:10,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407214282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:10,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:10,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:12:10,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919424213] [2021-05-06 05:12:10,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:12:10,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:12:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:12:10,872 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 05:12:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:10,918 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-06 05:12:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:12:10,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 05:12:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:10,920 INFO L225 Difference]: With dead ends: 57 [2021-05-06 05:12:10,920 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 05:12:10,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:12:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 05:12:10,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 05:12:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 05:12:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 05:12:10,926 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2021-05-06 05:12:10,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:10,926 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 05:12:10,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 05:12:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 05:12:10,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 05:12:10,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:10,927 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:11,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:12:11,141 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2021-05-06 05:12:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:11,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981945073] [2021-05-06 05:12:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:11,148 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:11,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491434964] [2021-05-06 05:12:11,149 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 [2021-05-06 05:12:11,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:12:11,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:12:11,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:12:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:11,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:12:11,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:11,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981945073] [2021-05-06 05:12:11,285 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:11,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491434964] [2021-05-06 05:12:11,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491434964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:11,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:11,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:12:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594761734] [2021-05-06 05:12:11,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:12:11,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:11,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:12:11,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:12:11,286 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:12:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:11,354 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-06 05:12:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:12:11,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-06 05:12:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:11,356 INFO L225 Difference]: With dead ends: 61 [2021-05-06 05:12:11,356 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 05:12:11,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:12:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 05:12:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 05:12:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:12:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-06 05:12:11,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 39 [2021-05-06 05:12:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:11,362 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-06 05:12:11,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:12:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-06 05:12:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 05:12:11,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:11,363 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:11,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:12:11,577 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2021-05-06 05:12:11,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:11,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649842676] [2021-05-06 05:12:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:11,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:11,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454866514] [2021-05-06 05:12:11,621 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 [2021-05-06 05:12:11,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:12:11,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:12:11,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:12:11,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:12:11,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:11,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649842676] [2021-05-06 05:12:11,777 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:11,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454866514] [2021-05-06 05:12:11,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454866514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:11,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:11,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:12:11,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098501735] [2021-05-06 05:12:11,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:12:11,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:12:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:12:11,778 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:12:11,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:11,830 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-05-06 05:12:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:12:11,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 05:12:11,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:11,831 INFO L225 Difference]: With dead ends: 65 [2021-05-06 05:12:11,831 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 05:12:11,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:12:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 05:12:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 05:12:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:12:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 05:12:11,837 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2021-05-06 05:12:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:11,837 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 05:12:11,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:12:11,837 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 05:12:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 05:12:11,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:11,838 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:12,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:12:12,046 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash -463567166, now seen corresponding path program 4 times [2021-05-06 05:12:12,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:12,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550103870] [2021-05-06 05:12:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:12,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:12,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16279946] [2021-05-06 05:12:12,058 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 [2021-05-06 05:12:12,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:12:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:12:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:12:12,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:12,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 05:12:12,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:12,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550103870] [2021-05-06 05:12:12,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:12,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16279946] [2021-05-06 05:12:12,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16279946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:12,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:12,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:12:12,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865052099] [2021-05-06 05:12:12,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:12:12,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:12,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:12:12,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:12:12,206 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:12:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:12,290 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-06 05:12:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:12:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-06 05:12:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:12,292 INFO L225 Difference]: With dead ends: 74 [2021-05-06 05:12:12,292 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 05:12:12,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:12:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 05:12:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-06 05:12:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 05:12:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-05-06 05:12:12,312 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 51 [2021-05-06 05:12:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:12,313 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-05-06 05:12:12,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:12:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-05-06 05:12:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 05:12:12,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:12,313 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:12,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:12:12,514 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash 790038090, now seen corresponding path program 5 times [2021-05-06 05:12:12,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:12,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75491102] [2021-05-06 05:12:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:12,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:12,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904931678] [2021-05-06 05:12:12,524 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 [2021-05-06 05:12:12,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 05:12:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:12:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 05:12:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:12,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:12:12,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:12,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75491102] [2021-05-06 05:12:12,717 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:12,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904931678] [2021-05-06 05:12:12,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904931678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:12,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:12,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:12:12,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235276820] [2021-05-06 05:12:12,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:12:12,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:12:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:12:12,719 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 05:12:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:12,816 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-06 05:12:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:12:12,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 05:12:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:12,819 INFO L225 Difference]: With dead ends: 78 [2021-05-06 05:12:12,819 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 05:12:12,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:12:12,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 05:12:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 05:12:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:12:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-05-06 05:12:12,831 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 56 [2021-05-06 05:12:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:12,832 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-05-06 05:12:12,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 05:12:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-05-06 05:12:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 05:12:12,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:12,836 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:13,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:12:13,037 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1996886914, now seen corresponding path program 6 times [2021-05-06 05:12:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:13,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973994841] [2021-05-06 05:12:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:13,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:13,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436088064] [2021-05-06 05:12:13,044 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 [2021-05-06 05:12:13,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 05:12:13,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:12:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 05:12:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 05:12:13,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973994841] [2021-05-06 05:12:13,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436088064] [2021-05-06 05:12:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436088064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:13,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:13,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:12:13,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983068996] [2021-05-06 05:12:13,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:12:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:12:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:12:13,275 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 05:12:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:13,454 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-05-06 05:12:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:12:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 05:12:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:13,457 INFO L225 Difference]: With dead ends: 86 [2021-05-06 05:12:13,458 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 05:12:13,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:12:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 05:12:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 05:12:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 05:12:13,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-05-06 05:12:13,470 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 61 [2021-05-06 05:12:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:13,471 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-05-06 05:12:13,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 05:12:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-05-06 05:12:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 05:12:13,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:13,474 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:13,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:12:13,685 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:13,685 INFO L82 PathProgramCache]: Analyzing trace with hash -415362136, now seen corresponding path program 7 times [2021-05-06 05:12:13,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:13,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427868103] [2021-05-06 05:12:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:13,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:13,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598986694] [2021-05-06 05:12:13,691 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 [2021-05-06 05:12:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:12:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:12:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:13,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 05:12:13,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427868103] [2021-05-06 05:12:13,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598986694] [2021-05-06 05:12:13,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598986694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:13,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:13,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:12:13,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208610178] [2021-05-06 05:12:13,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:12:13,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:13,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:12:13,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:12:13,901 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 05:12:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:13,984 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-05-06 05:12:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:12:13,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-06 05:12:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:13,985 INFO L225 Difference]: With dead ends: 91 [2021-05-06 05:12:13,985 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 05:12:13,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:12:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 05:12:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-05-06 05:12:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:12:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-05-06 05:12:13,990 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 68 [2021-05-06 05:12:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:13,990 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-05-06 05:12:13,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 05:12:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-05-06 05:12:13,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 05:12:13,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:13,991 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:14,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:12:14,199 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:14,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1903584988, now seen corresponding path program 8 times [2021-05-06 05:12:14,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:14,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942357281] [2021-05-06 05:12:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:14,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:14,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378147803] [2021-05-06 05:12:14,205 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 [2021-05-06 05:12:14,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:12:14,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:12:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 05:12:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:14,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 05:12:14,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:14,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942357281] [2021-05-06 05:12:14,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:14,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378147803] [2021-05-06 05:12:14,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378147803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:14,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:14,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 05:12:14,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973696] [2021-05-06 05:12:14,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 05:12:14,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:14,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 05:12:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:12:14,495 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 05:12:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:14,640 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2021-05-06 05:12:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 05:12:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2021-05-06 05:12:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:14,641 INFO L225 Difference]: With dead ends: 95 [2021-05-06 05:12:14,641 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 05:12:14,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:12:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 05:12:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 05:12:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 05:12:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 05:12:14,649 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 73 [2021-05-06 05:12:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:14,649 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 05:12:14,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 05:12:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 05:12:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 05:12:14,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:12:14,650 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:12:14,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:12:14,856 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:12:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:12:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2040579864, now seen corresponding path program 9 times [2021-05-06 05:12:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:12:14,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209504431] [2021-05-06 05:12:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:12:14,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:12:14,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756650796] [2021-05-06 05:12:14,863 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 [2021-05-06 05:12:14,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 05:12:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:12:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 05:12:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:12:15,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:15,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:19,257 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-06 05:12:19,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:19,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:19,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:12:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-06 05:12:19,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:12:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209504431] [2021-05-06 05:12:19,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:12:19,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756650796] [2021-05-06 05:12:19,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756650796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:12:19,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:12:19,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 05:12:19,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061888972] [2021-05-06 05:12:19,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:12:19,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:12:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:12:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=1, NotChecked=0, Total=72 [2021-05-06 05:12:19,283 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:12:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:12:19,775 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-06 05:12:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:12:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 05:12:19,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:12:19,776 INFO L225 Difference]: With dead ends: 92 [2021-05-06 05:12:19,776 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:12:19,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4202.1ms TimeCoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-05-06 05:12:19,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:12:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:12:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:12:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:12:19,777 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 78 [2021-05-06 05:12:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:12:19,778 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:12:19,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:12:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:12:19,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:12:19,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 05:12:19,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:12:20,316 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 24 [2021-05-06 05:12:20,517 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L194 CegarLoopUtils]: 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|)) [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 05:12:20,637 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:12:20,637 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L194 CegarLoopUtils]: At program point L31(line 31) 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)) [2021-05-06 05:12:20,638 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) 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)) [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L194 CegarLoopUtils]: At program point L44(line 44) 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)) [2021-05-06 05:12:20,638 INFO L194 CegarLoopUtils]: At program point L32(line 32) 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)) [2021-05-06 05:12:20,638 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2021-05-06 05:12:20,638 INFO L194 CegarLoopUtils]: At program point L30-2(lines 30 42) 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)) [2021-05-06 05:12:20,638 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) 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)) [2021-05-06 05:12:20,638 INFO L201 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-06 05:12:20,638 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:12:20,638 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-06 05:12:20,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:12:20 BoogieIcfgContainer [2021-05-06 05:12:20,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:12:20,649 INFO L168 Benchmark]: Toolchain (without parser) took 12292.77 ms. Allocated memory was 226.5 MB in the beginning and 284.2 MB in the end (delta: 57.7 MB). Free memory was 190.9 MB in the beginning and 137.7 MB in the end (delta: 53.2 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:12:20,649 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 226.5 MB. Free memory is still 207.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:12:20,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.33 ms. Allocated memory is still 226.5 MB. Free memory was 190.7 MB in the beginning and 180.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 05:12:20,649 INFO L168 Benchmark]: Boogie Preprocessor took 69.79 ms. Allocated memory is still 226.5 MB. Free memory was 180.8 MB in the beginning and 209.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:12:20,649 INFO L168 Benchmark]: RCFGBuilder took 291.05 ms. Allocated memory is still 226.5 MB. Free memory was 209.6 MB in the beginning and 194.1 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:12:20,649 INFO L168 Benchmark]: TraceAbstraction took 11743.65 ms. Allocated memory was 226.5 MB in the beginning and 284.2 MB in the end (delta: 57.7 MB). Free memory was 194.1 MB in the beginning and 137.7 MB in the end (delta: 56.4 MB). Peak memory consumption was 115.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:12:20,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 226.5 MB. Free memory is still 207.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.33 ms. Allocated memory is still 226.5 MB. Free memory was 190.7 MB in the beginning and 180.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.79 ms. Allocated memory is still 226.5 MB. Free memory was 180.8 MB in the beginning and 209.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 5.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.05 ms. Allocated memory is still 226.5 MB. Free memory was 209.6 MB in the beginning and 194.1 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11743.65 ms. Allocated memory was 226.5 MB in the beginning and 284.2 MB in the end (delta: 57.7 MB). Free memory was 194.1 MB in the beginning and 137.7 MB in the end (delta: 56.4 MB). Peak memory consumption was 115.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11012.5ms, OverallIterations: 13, TraceHistogramMax: 12, EmptinessCheckTime: 20.9ms, AutomataDifference: 1839.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 657.2ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 434 SDtfs, 125 SDslu, 1549 SDs, 0 SdLazy, 1085 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1163.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4717.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=12, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 121.6ms AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 48 PreInvPairs, 82 NumberOfFragments, 194 HoareAnnotationTreeSize, 48 FomulaSimplifications, 14442 FormulaSimplificationTreeSizeReduction, 143.3ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 3052 FormulaSimplificationTreeSizeReductionInter, 503.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 87.5ms SsaConstructionTime, 338.4ms SatisfiabilityAnalysisTime, 5738.7ms InterpolantComputationTime, 587 NumberOfCodeBlocks, 537 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 1673 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1734 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 1028/1126 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: s * 4 == t * t + t * 2 + 1 && a * 2 + 1 == t RESULT: Ultimate proved your program to be correct! Received shutdown request...