/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_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:23:02,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:23:02,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:23:02,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:23:02,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:23:02,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:23:02,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:23:02,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:23:02,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:23:02,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:23:02,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:23:02,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:23:02,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:23:02,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:23:02,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:23:02,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:23:02,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:23:02,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:23:02,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:23:02,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:23:02,998 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 [2021-05-02 17:23:03,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:23:03,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:23:03,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:23:03,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:23:03,016 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:23:03,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:23:03,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:23:03,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:23:03,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:23:03,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:23:03,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:23:03,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:23:03,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:23:03,021 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:23:03,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:23:03,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:23:03,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:23:03,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:23:03,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:23:03,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:23:03,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:23:03,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:23:03,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:23:03,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:23:03,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:23:03,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:23:03,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:23:03,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:23:03,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:23:03,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:23:03,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:23:03,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:23:03,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:23:03,312 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:23:03,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2021-05-02 17:23:03,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab79ccc3/f87e96f1eb614104aa21e02a150f7860/FLAG5487796e9 [2021-05-02 17:23:03,749 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:23:03,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2021-05-02 17:23:03,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab79ccc3/f87e96f1eb614104aa21e02a150f7860/FLAG5487796e9 [2021-05-02 17:23:04,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eab79ccc3/f87e96f1eb614104aa21e02a150f7860 [2021-05-02 17:23:04,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:23:04,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:23:04,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:23:04,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:23:04,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:23:04,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653cc50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04, skipping insertion in model container [2021-05-02 17:23:04,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:23:04,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:23:04,279 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_unwindbound2.c[520,533] [2021-05-02 17:23:04,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:23:04,294 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:23:04,346 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_unwindbound2.c[520,533] [2021-05-02 17:23:04,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:23:04,360 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:23:04,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04 WrapperNode [2021-05-02 17:23:04,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:23:04,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:23:04,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:23:04,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:23:04,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (1/1) ... [2021-05-02 17:23:04,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:23:04,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:23:04,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:23:04,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:23:04,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (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 [2021-05-02 17:23:04,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:23:04,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:23:04,477 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:23:04,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:23:04,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:23:04,477 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:23:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:23:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:23:04,477 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:23:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:23:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:23:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:23:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:23:04,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:23:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:23:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:23:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:23:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:23:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:23:04,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:23:04,662 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:23:04,663 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:23:04,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:23:04 BoogieIcfgContainer [2021-05-02 17:23:04,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:23:04,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:23:04,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:23:04,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:23:04,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:23:04" (1/3) ... [2021-05-02 17:23:04,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7599fc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:23:04, skipping insertion in model container [2021-05-02 17:23:04,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:04" (2/3) ... [2021-05-02 17:23:04,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7599fc0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:23:04, skipping insertion in model container [2021-05-02 17:23:04,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:23:04" (3/3) ... [2021-05-02 17:23:04,668 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound2.c [2021-05-02 17:23:04,672 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:23:04,674 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:23:04,685 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:23:04,700 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:23:04,700 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:23:04,700 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:23:04,700 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:23:04,700 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:23:04,700 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:23:04,701 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:23:04,701 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:23:04,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:23:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:23:04,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:04,729 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:04,730 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-02 17:23:04,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:04,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090843665] [2021-05-02 17:23:04,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:04,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:23:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:04,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090843665] [2021-05-02 17:23:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090843665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:23:04,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:23:04,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:23:04,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408564382] [2021-05-02 17:23:04,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:23:04,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:04,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:23:04,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:23:04,979 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:23:05,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:05,079 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-02 17:23:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:23:05,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:23:05,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:05,086 INFO L225 Difference]: With dead ends: 47 [2021-05-02 17:23:05,086 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:23:05,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:23:05,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:23:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 17:23:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:23:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 17:23:05,121 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 17:23:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:05,121 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 17:23:05,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:23:05,122 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 17:23:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:23:05,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:05,125 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:05,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:23:05,125 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:05,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-02 17:23:05,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:05,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050302171] [2021-05-02 17:23:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:05,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:23:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:05,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:05,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050302171] [2021-05-02 17:23:05,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050302171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:23:05,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:23:05,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:23:05,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852370418] [2021-05-02 17:23:05,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:23:05,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:23:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:23:05,244 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:23:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:05,355 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-02 17:23:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:23:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 17:23:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:05,357 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:23:05,357 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 17:23:05,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:05,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 17:23:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 17:23:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:23:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 17:23:05,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 17:23:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:05,372 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 17:23:05,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:23:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 17:23:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:23:05,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:05,374 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:05,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:23:05,375 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-02 17:23:05,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:05,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025994672] [2021-05-02 17:23:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:05,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:23:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:05,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:05,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025994672] [2021-05-02 17:23:05,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025994672] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:23:05,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:23:05,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:23:05,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124636784] [2021-05-02 17:23:05,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:23:05,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:05,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:23:05,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:05,490 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:23:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:05,662 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-02 17:23:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:23:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 17:23:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:05,663 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:23:05,663 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 17:23:05,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:05,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 17:23:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 17:23:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:23:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 17:23:05,670 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 17:23:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:05,670 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 17:23:05,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:23:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 17:23:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:23:05,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:05,671 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:05,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 17:23:05,671 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2021-05-02 17:23:05,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:05,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648831801] [2021-05-02 17:23:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:05,680 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:05,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522787630] [2021-05-02 17:23:05,681 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 [2021-05-02 17:23:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:05,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:23:05,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:05,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:05,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648831801] [2021-05-02 17:23:05,804 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:05,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522787630] [2021-05-02 17:23:05,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522787630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:05,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:05,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:05,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933238783] [2021-05-02 17:23:05,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:05,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:05,805 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:23:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:05,894 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 17:23:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 17:23:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:05,896 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:23:05,896 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 17:23:05,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:05,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 17:23:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 17:23:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:23:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 17:23:05,913 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-05-02 17:23:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:05,913 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 17:23:05,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:23:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 17:23:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 17:23:05,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:05,914 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:06,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:06,135 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:06,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2021-05-02 17:23:06,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:06,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424254321] [2021-05-02 17:23:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:06,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:06,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082429743] [2021-05-02 17:23:06,142 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 [2021-05-02 17:23:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:23:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:06,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:23:06,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424254321] [2021-05-02 17:23:06,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082429743] [2021-05-02 17:23:06,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082429743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:06,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:06,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 17:23:06,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472070042] [2021-05-02 17:23:06,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:23:06,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:06,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:23:06,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:23:06,287 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:23:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:06,324 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-05-02 17:23:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:23:06,327 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 17:23:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:06,329 INFO L225 Difference]: With dead ends: 46 [2021-05-02 17:23:06,329 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 17:23:06,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 17:23:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 17:23:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:23:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 17:23:06,337 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 30 [2021-05-02 17:23:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:06,338 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 17:23:06,342 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), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:23:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 17:23:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 17:23:06,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:06,343 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:06,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:06,553 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2021-05-02 17:23:06,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:06,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290628181] [2021-05-02 17:23:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:06,560 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:06,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45572451] [2021-05-02 17:23:06,560 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 [2021-05-02 17:23:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:06,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:23:06,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:23:06,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290628181] [2021-05-02 17:23:06,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45572451] [2021-05-02 17:23:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45572451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:06,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:06,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 17:23:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163913189] [2021-05-02 17:23:06,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:23:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:23:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:06,694 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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) [2021-05-02 17:23:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:06,745 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-05-02 17:23:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:23:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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 30 [2021-05-02 17:23:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:06,746 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:23:06,746 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:23:06,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:23:06,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:23:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:23:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 17:23:06,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-05-02 17:23:06,758 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 30 [2021-05-02 17:23:06,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:06,758 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-05-02 17:23:06,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 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) [2021-05-02 17:23:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-05-02 17:23:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 17:23:06,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:06,759 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:06,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:06,973 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2021-05-02 17:23:06,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:06,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495547425] [2021-05-02 17:23:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:06,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:06,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444027553] [2021-05-02 17:23:06,979 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 [2021-05-02 17:23:07,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:23:07,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:23:07,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:07,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:07,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:23:07,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:07,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495547425] [2021-05-02 17:23:07,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:07,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444027553] [2021-05-02 17:23:07,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444027553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:07,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:07,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:23:07,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61269946] [2021-05-02 17:23:07,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:23:07,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:23:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:23:07,220 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:23:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:07,350 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-02 17:23:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:23:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 17:23:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:07,351 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:23:07,351 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:23:07,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:23:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:23:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 17:23:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 17:23:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 17:23:07,356 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-05-02 17:23:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:07,356 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 17:23:07,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:23:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 17:23:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 17:23:07,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:07,357 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:07,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:07,573 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1332643880, now seen corresponding path program 2 times [2021-05-02 17:23:07,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:07,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294602207] [2021-05-02 17:23:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:07,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:07,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371954704] [2021-05-02 17:23:07,580 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 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 [2021-05-02 17:23:07,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:23:07,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:07,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:23:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 17:23:07,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:07,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294602207] [2021-05-02 17:23:07,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:07,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371954704] [2021-05-02 17:23:07,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371954704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:07,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:07,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:23:07,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406821140] [2021-05-02 17:23:07,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:23:07,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:07,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:23:07,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:23:07,753 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 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) [2021-05-02 17:23:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:07,832 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-02 17:23:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:07,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 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 48 [2021-05-02 17:23:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:07,833 INFO L225 Difference]: With dead ends: 64 [2021-05-02 17:23:07,833 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 17:23:07,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 17:23:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-02 17:23:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 17:23:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 17:23:07,838 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 48 [2021-05-02 17:23:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:07,839 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 17:23:07,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 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) [2021-05-02 17:23:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 17:23:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 17:23:07,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:07,839 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:08,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:08,057 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1748438349, now seen corresponding path program 1 times [2021-05-02 17:23:08,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:08,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920859495] [2021-05-02 17:23:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:08,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:08,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093995016] [2021-05-02 17:23:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 17:23:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:23:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 17:23:08,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:08,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920859495] [2021-05-02 17:23:08,394 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:08,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093995016] [2021-05-02 17:23:08,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093995016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:08,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:08,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:23:08,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39224222] [2021-05-02 17:23:08,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:23:08,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:23:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:23:08,395 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 17:23:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:08,585 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-05-02 17:23:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:23:08,586 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-02 17:23:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:08,587 INFO L225 Difference]: With dead ends: 68 [2021-05-02 17:23:08,587 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 17:23:08,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:23:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 17:23:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 17:23:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 17:23:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-05-02 17:23:08,593 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 53 [2021-05-02 17:23:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:08,593 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-05-02 17:23:08,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 17:23:08,593 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-05-02 17:23:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:23:08,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:08,594 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:08,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:08,801 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:08,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:08,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1073750136, now seen corresponding path program 1 times [2021-05-02 17:23:08,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:08,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019620318] [2021-05-02 17:23:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:08,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:08,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13789188] [2021-05-02 17:23:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 17:23:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:23:08,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 17:23:09,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:09,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019620318] [2021-05-02 17:23:09,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:09,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13789188] [2021-05-02 17:23:09,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13789188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:09,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:09,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:23:09,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152790626] [2021-05-02 17:23:09,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:23:09,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:23:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:09,055 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 17:23:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:09,223 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-05-02 17:23:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:23:09,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-02 17:23:09,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:09,225 INFO L225 Difference]: With dead ends: 72 [2021-05-02 17:23:09,225 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 17:23:09,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:23:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 17:23:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 17:23:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 17:23:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-05-02 17:23:09,231 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 58 [2021-05-02 17:23:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:09,231 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-05-02 17:23:09,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 17:23:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-05-02 17:23:09,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 17:23:09,232 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:09,232 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:09,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:23:09,445 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1908652266, now seen corresponding path program 3 times [2021-05-02 17:23:09,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:09,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879612181] [2021-05-02 17:23:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:09,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:09,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489458342] [2021-05-02 17:23:09,451 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 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 [2021-05-02 17:23:09,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:23:09,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:09,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:23:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:09,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 17:23:09,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:09,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879612181] [2021-05-02 17:23:09,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:09,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489458342] [2021-05-02 17:23:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489458342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:09,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:09,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 17:23:09,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329946687] [2021-05-02 17:23:09,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:23:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:23:09,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:09,620 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:23:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:09,654 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-05-02 17:23:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:23:09,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-02 17:23:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:09,654 INFO L225 Difference]: With dead ends: 67 [2021-05-02 17:23:09,654 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:23:09,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:23:09,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:23:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:23:09,657 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) [2021-05-02 17:23:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:23:09,657 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2021-05-02 17:23:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:09,657 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:23:09,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:23:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:23:09,658 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:23:09,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 17:23:09,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:23:10,220 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 17:23:10,220 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 17:23:10,220 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 17:23:10,220 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:23:10,221 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)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 17:23:10,221 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (or (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (<= 2 ~counter~0)) (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:23:10,221 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (<= 2 ~counter~0)) (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2021-05-02 17:23:10,221 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 17:23:10,222 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2021-05-02 17:23:10,222 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= (+ (* main_~a~0 2) 2) main_~s~0) (= main_~a~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:23:10,222 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (<= 2 ~counter~0)) (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:23:10,222 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-02 17:23:10,222 INFO L198 CegarLoopUtils]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:23:10,222 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1)) (and (= ~counter~0 |old(~counter~0)|) (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (not (= |old(~counter~0)| 0)) (and (= 5 main_~t~0) (<= 2 ~counter~0) (= main_~a~0 2) (= main_~s~0 9))) [2021-05-02 17:23:10,222 INFO L194 CegarLoopUtils]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1)) (not (= |old(~counter~0)| 0)) (and (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1))) [2021-05-02 17:23:10,222 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= (+ (* main_~a~0 2) 2) main_~s~0) (= main_~a~0 1)) (not (= |old(~counter~0)| 0)) (and (= 5 main_~t~0) (= (+ main_~s~0 1) (* main_~t~0 2)))) [2021-05-02 17:23:10,222 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 17:23:10,222 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 17:23:10,222 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 17:23:10,222 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:23:10,222 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:23:10,222 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 17:23:10,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:23:10 BoogieIcfgContainer [2021-05-02 17:23:10,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:23:10,233 INFO L168 Benchmark]: Toolchain (without parser) took 6071.15 ms. Allocated memory was 207.6 MB in the beginning and 300.9 MB in the end (delta: 93.3 MB). Free memory was 171.5 MB in the beginning and 116.6 MB in the end (delta: 55.0 MB). Peak memory consumption was 149.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:10,233 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 207.6 MB. Free memory was 188.0 MB in the beginning and 188.0 MB in the end (delta: 81.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:23:10,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.32 ms. Allocated memory is still 207.6 MB. Free memory was 171.3 MB in the beginning and 189.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:10,234 INFO L168 Benchmark]: Boogie Preprocessor took 36.51 ms. Allocated memory is still 207.6 MB. Free memory was 189.2 MB in the beginning and 187.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:10,234 INFO L168 Benchmark]: RCFGBuilder took 263.12 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 173.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:10,234 INFO L168 Benchmark]: TraceAbstraction took 5568.36 ms. Allocated memory was 207.6 MB in the beginning and 300.9 MB in the end (delta: 93.3 MB). Free memory was 172.5 MB in the beginning and 116.6 MB in the end (delta: 56.0 MB). Peak memory consumption was 150.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:10,234 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 207.6 MB. Free memory was 188.0 MB in the beginning and 188.0 MB in the end (delta: 81.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 197.32 ms. Allocated memory is still 207.6 MB. Free memory was 171.3 MB in the beginning and 189.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.51 ms. Allocated memory is still 207.6 MB. Free memory was 189.2 MB in the beginning and 187.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 263.12 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 173.2 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5568.36 ms. Allocated memory was 207.6 MB in the beginning and 300.9 MB in the end (delta: 93.3 MB). Free memory was 172.5 MB in the beginning and 116.6 MB in the end (delta: 56.0 MB). Peak memory consumption was 150.5 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5162.7ms, OverallIterations: 11, TraceHistogramMax: 10, EmptinessCheckTime: 29.8ms, AutomataDifference: 1212.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 358.5ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 307 SDtfs, 108 SDslu, 935 SDs, 0 SdLazy, 855 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 592.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 364 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 549.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 97.2ms AutomataMinimizationTime, 11 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 47 PreInvPairs, 65 NumberOfFragments, 348 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 50.1ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 501 FormulaSimplificationTreeSizeReductionInter, 299.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 81.2ms SsaConstructionTime, 236.2ms SatisfiabilityAnalysisTime, 1355.4ms InterpolantComputationTime, 372 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 361 ConstructedInterpolants, 0 QuantifiedInterpolants, 1289 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1326 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 520/593 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: ((((((1 <= counter && counter <= 1) && t == 3) && s == t + 1) && a == 1) || (((counter == \old(counter) && a == 0) && a * 2 + 1 == t) && s == 1)) || !(\old(counter) == 0)) || (((5 == t && 2 <= counter) && a == 2) && s == 9) RESULT: Ultimate proved your program to be correct! Received shutdown request...