/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/ps3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:44:00,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:44:00,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:44:00,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:44:00,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:44:00,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:44:00,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:44:00,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:44:00,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:44:00,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:44:00,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:44:00,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:44:00,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:44:00,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:44:00,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:44:00,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:44:00,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:44:00,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:44:00,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:44:00,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:44:00,309 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 16:44:00,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:44:00,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:44:00,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:44:00,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:44:00,340 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:44:00,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:44:00,341 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:44:00,341 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:44:00,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:44:00,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:44:00,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:44:00,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:44:00,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:44:00,342 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:44:00,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:44:00,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:44:00,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:44:00,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:44:00,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:44:00,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:44:00,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:44:00,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:44:00,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:44:00,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:44:00,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:44:00,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:44:00,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:44:00,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:44:00,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:44:00,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:44:00,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:44:00,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:44:00,656 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:44:00,657 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:44:00,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-02 16:44:00,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5deda8287/9032c7f470084df9b2b8f9a743eaec73/FLAGc0944f303 [2021-05-02 16:44:01,002 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:44:01,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-02 16:44:01,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5deda8287/9032c7f470084df9b2b8f9a743eaec73/FLAGc0944f303 [2021-05-02 16:44:01,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5deda8287/9032c7f470084df9b2b8f9a743eaec73 [2021-05-02 16:44:01,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:44:01,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:44:01,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:44:01,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:44:01,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:44:01,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1945cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01, skipping insertion in model container [2021-05-02 16:44:01,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:44:01,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:44:01,547 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/ps3-ll_valuebound1.c[458,471] [2021-05-02 16:44:01,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:44:01,561 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:44:01,593 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/ps3-ll_valuebound1.c[458,471] [2021-05-02 16:44:01,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:44:01,620 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:44:01,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01 WrapperNode [2021-05-02 16:44:01,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:44:01,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:44:01,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:44:01,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:44:01,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (1/1) ... [2021-05-02 16:44:01,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:44:01,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:44:01,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:44:01,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:44:01,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (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 16:44:01,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:44:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:44:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:44:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:44:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:44:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:44:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:44:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:44:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:44:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:44:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 16:44:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:44:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:44:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:44:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:44:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:44:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:44:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:44:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:44:01,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:44:01,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:44:01,939 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:44:01,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:44:01 BoogieIcfgContainer [2021-05-02 16:44:01,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:44:01,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:44:01,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:44:01,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:44:01,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:44:01" (1/3) ... [2021-05-02 16:44:01,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f2ce4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:44:01, skipping insertion in model container [2021-05-02 16:44:01,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:44:01" (2/3) ... [2021-05-02 16:44:01,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49f2ce4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:44:01, skipping insertion in model container [2021-05-02 16:44:01,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:44:01" (3/3) ... [2021-05-02 16:44:01,945 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_valuebound1.c [2021-05-02 16:44:01,964 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:44:01,967 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:44:01,982 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:44:02,002 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:44:02,002 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:44:02,003 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:44:02,003 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:44:02,003 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:44:02,003 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:44:02,003 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:44:02,003 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:44:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:44:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:44:02,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:44:02,029 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:44:02,029 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:44:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:44:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 1 times [2021-05-02 16:44:02,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:44:02,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338631992] [2021-05-02 16:44:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:44:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:44:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:44:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:44:02,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:44:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:44:02,171 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 16:44:02,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:44:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338631992] [2021-05-02 16:44:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338631992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:44:02,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:44:02,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:44:02,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710609142] [2021-05-02 16:44:02,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:44:02,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:44:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:44:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:44:02,188 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:44:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:44:02,266 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 16:44:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:44:02,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:44:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:44:02,273 INFO L225 Difference]: With dead ends: 45 [2021-05-02 16:44:02,274 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 16:44:02,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:44:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 16:44:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 16:44:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:44:02,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 16:44:02,312 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-02 16:44:02,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:44:02,312 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 16:44:02,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:44:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 16:44:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:44:02,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:44:02,314 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:44:02,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:44:02,314 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:44:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:44:02,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 1 times [2021-05-02 16:44:02,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:44:02,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485752943] [2021-05-02 16:44:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:44:02,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:44:02,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496190143] [2021-05-02 16:44:02,349 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 16:44:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:44:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:44:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:44:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:02,541 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 16:44:02,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:44:02,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485752943] [2021-05-02 16:44:02,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:44:02,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496190143] [2021-05-02 16:44:02,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496190143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:44:02,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:44:02,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:44:02,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104909783] [2021-05-02 16:44:02,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:44:02,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:44:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:44:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:44:02,544 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:44:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:44:02,587 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-05-02 16:44:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:44:02,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:44:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:44:02,588 INFO L225 Difference]: With dead ends: 32 [2021-05-02 16:44:02,588 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 16:44:02,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:44:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 16:44:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 16:44:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:44:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 16:44:02,594 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-02 16:44:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:44:02,594 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 16:44:02,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:44:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 16:44:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 16:44:02,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:44:02,595 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:44:02,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:44:02,809 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:44:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:44:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash 276758134, now seen corresponding path program 1 times [2021-05-02 16:44:02,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:44:02,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902945974] [2021-05-02 16:44:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:44:02,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:44:02,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624189806] [2021-05-02 16:44:02,821 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 16:44:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:44:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:44:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:44:02,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:44:02,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:44:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902945974] [2021-05-02 16:44:02,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:44:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624189806] [2021-05-02 16:44:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624189806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:44:02,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:44:02,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:44:02,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403765714] [2021-05-02 16:44:02,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:44:02,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:44:02,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:44:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:44:02,991 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 16:44:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:44:03,045 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-05-02 16:44:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:44:03,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 24 [2021-05-02 16:44:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:44:03,047 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:44:03,047 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 16:44:03,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:44:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 16:44:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 16:44:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:44:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 16:44:03,052 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-02 16:44:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:44:03,052 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 16:44:03,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 16:44:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 16:44:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 16:44:03,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:44:03,053 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:44:03,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:44:03,257 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:44:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:44:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1640710638, now seen corresponding path program 2 times [2021-05-02 16:44:03,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:44:03,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857240028] [2021-05-02 16:44:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:44:03,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:44:03,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524787224] [2021-05-02 16:44:03,271 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 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 16:44:03,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:44:03,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:44:03,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 16:44:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:44:03,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:44:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:44:03,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:44:03,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857240028] [2021-05-02 16:44:03,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:44:03,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524787224] [2021-05-02 16:44:03,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524787224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:44:03,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:44:03,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:44:03,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534153399] [2021-05-02 16:44:03,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:44:03,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:44:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:44:03,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:44:03,460 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:44:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:44:03,490 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-02 16:44:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:44:03,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 16:44:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:44:03,491 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:44:03,492 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 16:44:03,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:44:03,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 16:44:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 16:44:03,493 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 16:44:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 16:44:03,493 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-02 16:44:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:44:03,494 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 16:44:03,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:44:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 16:44:03,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 16:44:03,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:44:03,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 16:44:03,980 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 16:44:03,981 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 16:44:03,981 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 16:44:03,981 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:44:03,982 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 16:44:03,982 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:44:03,982 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:44:03,983 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 16:44:03,985 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 16:44:03,985 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:44:03,985 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-02 16:44:03,986 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 16:44:03,986 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:44:03,986 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:44:03,986 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 39) the Hoare annotation is: true [2021-05-02 16:44:03,986 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1)) (.cse1 (<= 0 main_~k~0))) (or (and .cse0 .cse1 (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)) (and (<= 1 main_~c~0) .cse0 (= (* main_~y~0 main_~y~0) main_~x~0) .cse1 (= main_~y~0 1)))) [2021-05-02 16:44:03,986 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-02 16:44:03,986 INFO L194 CegarLoopUtils]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1)) (.cse1 (<= 0 main_~k~0))) (or (and .cse0 .cse1 (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)) (and (<= 1 main_~c~0) .cse0 (= (* main_~y~0 main_~y~0) main_~x~0) .cse1 (= main_~y~0 1)))) [2021-05-02 16:44:03,987 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 39) no Hoare annotation was computed. [2021-05-02 16:44:03,987 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (and (= (* main_~y~0 main_~y~0) main_~x~0) (= main_~y~0 1)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 16:44:03,987 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-02 16:44:03,987 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-02 16:44:03,991 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 39) no Hoare annotation was computed. [2021-05-02 16:44:03,992 INFO L198 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-05-02 16:44:03,992 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 16:44:03,992 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 16:44:03,992 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 16:44:03,992 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:44:03,992 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:44:03,993 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 16:44:04,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:44:04 BoogieIcfgContainer [2021-05-02 16:44:04,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:44:04,004 INFO L168 Benchmark]: Toolchain (without parser) took 2560.22 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 144.6 MB in the beginning and 118.0 MB in the end (delta: 26.6 MB). Peak memory consumption was 63.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:44:04,004 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 179.3 MB. Free memory is still 160.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:44:04,005 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.96 ms. Allocated memory is still 179.3 MB. Free memory was 144.3 MB in the beginning and 162.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:44:04,007 INFO L168 Benchmark]: Boogie Preprocessor took 35.83 ms. Allocated memory is still 179.3 MB. Free memory was 162.2 MB in the beginning and 160.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 16:44:04,007 INFO L168 Benchmark]: RCFGBuilder took 281.98 ms. Allocated memory is still 179.3 MB. Free memory was 160.9 MB in the beginning and 146.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:44:04,007 INFO L168 Benchmark]: TraceAbstraction took 2062.44 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 146.2 MB in the beginning and 118.0 MB in the end (delta: 28.2 MB). Peak memory consumption was 64.9 MB. Max. memory is 8.0 GB. [2021-05-02 16:44:04,007 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 179.3 MB. Free memory is still 160.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 174.96 ms. Allocated memory is still 179.3 MB. Free memory was 144.3 MB in the beginning and 162.2 MB in the end (delta: -17.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.83 ms. Allocated memory is still 179.3 MB. Free memory was 162.2 MB in the beginning and 160.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 281.98 ms. Allocated memory is still 179.3 MB. Free memory was 160.9 MB in the beginning and 146.5 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2062.44 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 146.2 MB in the beginning and 118.0 MB in the end (delta: 28.2 MB). Peak memory consumption was 64.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1704.7ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 11.5ms, AutomataDifference: 234.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 274.7ms, InitialAbstractionConstructionTime: 15.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 81 SDtfs, 35 SDslu, 247 SDs, 0 SdLazy, 122 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 92.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 134.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 17 PreInvPairs, 23 NumberOfFragments, 124 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 67.8ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 308 FormulaSimplificationTreeSizeReductionInter, 194.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 23.1ms SsaConstructionTime, 78.5ms SatisfiabilityAnalysisTime, 466.5ms InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 253 SizeOfPredicates, 8 NumberOfNonLiveVariables, 357 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/19 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: 27]: Loop Invariant Derived loop invariant: ((((k <= 1 && 0 <= k) && y == 0) && 0 <= c) && x == 0) || ((((1 <= c && k <= 1) && y * y == x) && 0 <= k) && y == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...