/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/geo1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:43:52,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:43:52,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:43:52,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:43:52,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:43:52,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:43:52,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:43:52,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:43:52,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:43:52,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:43:52,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:43:52,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:43:52,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:43:52,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:43:52,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:43:52,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:43:52,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:43:52,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:43:52,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:43:52,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:43:52,265 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 13:43:52,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:43:52,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:43:52,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:43:52,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:43:52,306 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:43:52,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:43:52,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:43:52,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:43:52,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:43:52,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:43:52,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:43:52,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:43:52,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:43:52,308 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:43:52,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:43:52,308 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:43:52,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:43:52,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:43:52,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:43:52,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:43:52,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:43:52,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:43:52,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:43:52,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:43:52,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:43:52,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:43:52,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:43:52,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:43:52,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:43:52,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:43:52,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:43:52,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:43:52,632 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:43:52,633 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:43:52,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1-ll.c [2021-05-02 13:43:52,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52cb90530/d052a65711fc4b369c06608a390685de/FLAG093e28ff5 [2021-05-02 13:43:53,085 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:43:53,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1-ll.c [2021-05-02 13:43:53,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52cb90530/d052a65711fc4b369c06608a390685de/FLAG093e28ff5 [2021-05-02 13:43:53,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52cb90530/d052a65711fc4b369c06608a390685de [2021-05-02 13:43:53,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:43:53,498 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:43:53,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:53,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:43:53,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:43:53,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cfe2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53, skipping insertion in model container [2021-05-02 13:43:53,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:43:53,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:43:53,699 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/geo1-ll.c[546,559] [2021-05-02 13:43:53,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:53,721 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:43:53,778 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/geo1-ll.c[546,559] [2021-05-02 13:43:53,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:53,809 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:43:53,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53 WrapperNode [2021-05-02 13:43:53,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:53,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:43:53,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:43:53,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:43:53,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (1/1) ... [2021-05-02 13:43:53,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:43:53,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:43:53,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:43:53,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:43:53,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (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 13:43:53,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:43:53,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:43:53,929 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:43:53,929 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:43:53,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:43:53,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:43:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:43:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:43:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:43:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:43:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:43:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:43:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:43:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:43:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:43:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:43:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:43:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:43:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:43:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:43:54,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:43:54,156 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:43:54,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:54 BoogieIcfgContainer [2021-05-02 13:43:54,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:43:54,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:43:54,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:43:54,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:43:54,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:43:53" (1/3) ... [2021-05-02 13:43:54,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511c4f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:54, skipping insertion in model container [2021-05-02 13:43:54,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:53" (2/3) ... [2021-05-02 13:43:54,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511c4f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:54, skipping insertion in model container [2021-05-02 13:43:54,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:54" (3/3) ... [2021-05-02 13:43:54,170 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll.c [2021-05-02 13:43:54,174 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:43:54,177 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:43:54,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:43:54,231 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:43:54,232 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:43:54,232 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:43:54,232 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:43:54,232 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:43:54,232 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:43:54,232 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:43:54,232 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:43:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:43:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:43:54,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:54,250 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:54,251 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash 269945389, now seen corresponding path program 1 times [2021-05-02 13:43:54,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:54,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408726021] [2021-05-02 13:43:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:54,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:43:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:54,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:43:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:54,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 13:43:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:43:54,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:54,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408726021] [2021-05-02 13:43:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408726021] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:43:54,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:43:54,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:43:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476247176] [2021-05-02 13:43:54,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:43:54,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:43:54,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:43:54,466 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:54,558 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-02 13:43:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:43:54,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:43:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:54,566 INFO L225 Difference]: With dead ends: 51 [2021-05-02 13:43:54,567 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 13:43:54,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:43:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 13:43:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 13:43:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:43:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 13:43:54,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2021-05-02 13:43:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:54,604 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 13:43:54,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 13:43:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:43:54,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:54,606 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:54,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:43:54,606 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash -61113491, now seen corresponding path program 1 times [2021-05-02 13:43:54,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:54,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517706635] [2021-05-02 13:43:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:54,625 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:54,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378581954] [2021-05-02 13:43:54,625 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 13:43:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:43:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:54,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:43:54,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:54,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517706635] [2021-05-02 13:43:54,907 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:54,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378581954] [2021-05-02 13:43:54,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378581954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:43:54,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:43:54,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:43:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6457724] [2021-05-02 13:43:54,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:43:54,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:43:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:43:54,911 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:54,983 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 13:43:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:43:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:43:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:54,985 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:43:54,985 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 13:43:54,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:43:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 13:43:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-05-02 13:43:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:43:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 13:43:54,994 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2021-05-02 13:43:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:54,995 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 13:43:54,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:43:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 13:43:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:43:54,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:54,996 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:55,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:43:55,217 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash -990942717, now seen corresponding path program 1 times [2021-05-02 13:43:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:55,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592442636] [2021-05-02 13:43:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:55,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:55,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056814187] [2021-05-02 13:43:55,231 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 13:43:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:55,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:43:55,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:55,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:43:55,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:55,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592442636] [2021-05-02 13:43:55,515 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:55,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056814187] [2021-05-02 13:43:55,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056814187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:43:55,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:43:55,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:43:55,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458371495] [2021-05-02 13:43:55,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:43:55,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:55,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:43:55,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:43:55,518 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:43:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:57,686 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-02 13:43:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:43:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 13:43:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:57,689 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:43:57,689 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 13:43:57,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:43:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 13:43:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 13:43:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:43:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-02 13:43:57,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-05-02 13:43:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:57,696 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-02 13:43:57,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:43:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-02 13:43:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:43:57,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:57,697 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:57,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:57,913 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash -942979207, now seen corresponding path program 1 times [2021-05-02 13:43:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:57,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785468253] [2021-05-02 13:43:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:57,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:57,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576427841] [2021-05-02 13:43:57,926 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 13:43:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:43:57,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:58,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:43:58,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:58,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785468253] [2021-05-02 13:43:58,093 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:58,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576427841] [2021-05-02 13:43:58,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576427841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:43:58,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:43:58,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:43:58,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849458105] [2021-05-02 13:43:58,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:43:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:58,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:43:58,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:43:58,095 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:43:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:58,205 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-05-02 13:43:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:43:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 13:43:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:58,207 INFO L225 Difference]: With dead ends: 38 [2021-05-02 13:43:58,207 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:43:58,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:43:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:43:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 13:43:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:43:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 13:43:58,215 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-05-02 13:43:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:58,215 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 13:43:58,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:43:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 13:43:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:43:58,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:58,217 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:58,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:43:58,425 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:58,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1607210477, now seen corresponding path program 2 times [2021-05-02 13:43:58,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:58,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896510870] [2021-05-02 13:43:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:58,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:58,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092655878] [2021-05-02 13:43:58,439 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 13:43:58,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:43:58,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:43:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:43:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:58,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:43:58,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:04,756 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 13:44:04,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:04,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:04,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:04,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:44:04,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896510870] [2021-05-02 13:44:04,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:04,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092655878] [2021-05-02 13:44:04,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092655878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:04,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:04,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:44:04,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652127356] [2021-05-02 13:44:04,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:44:04,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:04,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:44:04,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2021-05-02 13:44:04,843 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:44:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:17,141 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-05-02 13:44:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:44:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 13:44:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:17,142 INFO L225 Difference]: With dead ends: 45 [2021-05-02 13:44:17,142 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 13:44:17,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6232.2ms TimeCoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2021-05-02 13:44:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 13:44:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 13:44:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:44:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-05-02 13:44:17,150 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2021-05-02 13:44:17,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:17,150 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-05-02 13:44:17,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:44:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-05-02 13:44:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 13:44:17,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:17,152 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:17,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:17,353 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 200269049, now seen corresponding path program 3 times [2021-05-02 13:44:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:17,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246948349] [2021-05-02 13:44:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:17,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:17,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449864644] [2021-05-02 13:44:17,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:17,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:44:17,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:44:17,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:44:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:19,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:19,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:21,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:23,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:23,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:23,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:23,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 13:44:25,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:25,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246948349] [2021-05-02 13:44:25,964 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:25,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449864644] [2021-05-02 13:44:25,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449864644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:25,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:25,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:44:25,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481109427] [2021-05-02 13:44:25,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:44:25,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:25,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:44:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=42, Unknown=1, NotChecked=0, Total=56 [2021-05-02 13:44:25,966 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 13:44:38,472 WARN L205 SmtUtils]: Spent 10.46 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-02 13:44:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:40,689 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 13:44:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:44:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 13:44:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:40,691 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:44:40,691 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:44:40,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 14843.8ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 13:44:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:44:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:44:40,692 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 13:44:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:44:40,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-05-02 13:44:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:40,692 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:44:40,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 13:44:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:44:40,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:44:40,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:44:40,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:44:41,275 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-02 13:44:41,275 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-02 13:44:41,275 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-02 13:44:41,276 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:44:41,276 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:44:41,276 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:44:41,276 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:44:41,276 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:44:41,276 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:44:41,276 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:44:41,276 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-02 13:44:41,276 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-02 13:44:41,276 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-02 13:44:41,276 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-02 13:44:41,277 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 44) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 (- 1)))) (and (<= 1 main_~k~0) (= (mod .cse0 main_~z~0) 0) (let ((.cse1 (div .cse0 main_~z~0))) (= (+ main_~y~0 (* main_~z~0 .cse1)) (+ main_~z~0 (* main_~z~0 main_~z~0 .cse1)))) (<= 1 main_~z~0))) [2021-05-02 13:44:41,277 INFO L198 CegarLoopUtils]: For program point L34-3(lines 34 44) no Hoare annotation was computed. [2021-05-02 13:44:41,277 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 50) the Hoare annotation is: true [2021-05-02 13:44:41,277 INFO L198 CegarLoopUtils]: For program point L28(line 28) no Hoare annotation was computed. [2021-05-02 13:44:41,277 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-02 13:44:41,277 INFO L194 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: (<= 1 main_~z~0) [2021-05-02 13:44:41,277 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 50) no Hoare annotation was computed. [2021-05-02 13:44:41,277 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (and (exists ((v_main_~x~0_11 Int) (main_~z~0 Int)) (let ((.cse0 (* v_main_~x~0_11 main_~z~0))) (and (<= 1 main_~z~0) (= .cse0 (+ v_main_~x~0_11 main_~x~0)) (= (+ .cse0 1) (+ v_main_~x~0_11 main_~y~0))))) (<= 1 main_~z~0)) [2021-05-02 13:44:41,277 INFO L198 CegarLoopUtils]: For program point L48-1(line 48) no Hoare annotation was computed. [2021-05-02 13:44:41,277 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 50) no Hoare annotation was computed. [2021-05-02 13:44:41,277 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 (- 1)))) (and (<= 1 main_~k~0) (= (mod .cse0 main_~z~0) 0) (let ((.cse1 (div .cse0 main_~z~0))) (= (+ main_~y~0 (* main_~z~0 .cse1)) (+ main_~z~0 (* main_~z~0 main_~z~0 .cse1)))) (<= 1 main_~z~0))) [2021-05-02 13:44:41,277 INFO L198 CegarLoopUtils]: For program point L35-1(lines 34 44) no Hoare annotation was computed. [2021-05-02 13:44:41,278 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-02 13:44:41,278 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-02 13:44:41,278 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-02 13:44:41,278 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-02 13:44:41,278 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-02 13:44:41,278 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-02 13:44:41,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:44:41 BoogieIcfgContainer [2021-05-02 13:44:41,290 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:44:41,291 INFO L168 Benchmark]: Toolchain (without parser) took 47792.47 ms. Allocated memory was 127.9 MB in the beginning and 189.8 MB in the end (delta: 61.9 MB). Free memory was 91.6 MB in the beginning and 77.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 77.2 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:41,291 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory is still 108.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:44:41,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.33 ms. Allocated memory was 127.9 MB in the beginning and 189.8 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 173.0 MB in the end (delta: -81.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:41,291 INFO L168 Benchmark]: Boogie Preprocessor took 41.56 ms. Allocated memory is still 189.8 MB. Free memory was 173.0 MB in the beginning and 171.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:41,291 INFO L168 Benchmark]: RCFGBuilder took 303.78 ms. Allocated memory is still 189.8 MB. Free memory was 171.4 MB in the beginning and 157.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:41,291 INFO L168 Benchmark]: TraceAbstraction took 47131.35 ms. Allocated memory is still 189.8 MB. Free memory was 157.0 MB in the beginning and 77.4 MB in the end (delta: 79.6 MB). Peak memory consumption was 80.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:41,292 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory is still 108.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.33 ms. Allocated memory was 127.9 MB in the beginning and 189.8 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 173.0 MB in the end (delta: -81.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.56 ms. Allocated memory is still 189.8 MB. Free memory was 173.0 MB in the beginning and 171.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 303.78 ms. Allocated memory is still 189.8 MB. Free memory was 171.4 MB in the beginning and 157.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 47131.35 ms. Allocated memory is still 189.8 MB. Free memory was 157.0 MB in the beginning and 77.4 MB in the end (delta: 79.6 MB). Peak memory consumption was 80.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 46664.8ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 11.8ms, AutomataDifference: 29503.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 380.8ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 115 SDtfs, 95 SDslu, 475 SDs, 0 SdLazy, 365 SolverSat, 34 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 16457.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 21358.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=5, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 19 PreInvPairs, 29 NumberOfFragments, 133 HoareAnnotationTreeSize, 19 FomulaSimplifications, 78 FormulaSimplificationTreeSizeReduction, 121.8ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 846 FormulaSimplificationTreeSizeReductionInter, 249.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 60.8ms SsaConstructionTime, 173.8ms SatisfiabilityAnalysisTime, 15501.6ms InterpolantComputationTime, 181 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 175 ConstructedInterpolants, 1 QuantifiedInterpolants, 630 SizeOfPredicates, 17 NumberOfNonLiveVariables, 655 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 60/78 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: 34]: Loop Invariant Derived loop invariant: ((1 <= k && (x + -1) % z == 0) && y + z * ((x + -1) / z) == z + z * z * ((x + -1) / z)) && 1 <= z RESULT: Ultimate proved your program to be correct! Received shutdown request...