/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-6253b08 [2021-05-06 04:44:04,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:04,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:04,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:44:04,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:04,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:04,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:04,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:04,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:04,466 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:04,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:04,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:04,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:04,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:04,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:04,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:04,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:44:04,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:04,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:04,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:04,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:44:04,556 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:04,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:04,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:04,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:04,559 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:04,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:04,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:04,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:04,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:04,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:04,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:04,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:04,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:04,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:04,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:04,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:04,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:04,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:04,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:04,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:04,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:04,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:04,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:04,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:04,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:04,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:04,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:04,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:04,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:04,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:04,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:04,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:04,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:04,882 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:04,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-06 04:44:04,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0728ef930/942389868bac41c3a17c1bb612aa63d4/FLAGbca7c1c89 [2021-05-06 04:44:05,322 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:05,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-06 04:44:05,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0728ef930/942389868bac41c3a17c1bb612aa63d4/FLAGbca7c1c89 [2021-05-06 04:44:05,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0728ef930/942389868bac41c3a17c1bb612aa63d4 [2021-05-06 04:44:05,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:05,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:05,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:05,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:05,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:05,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1e1563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05, skipping insertion in model container [2021-05-06 04:44:05,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:05,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:05,531 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] [2021-05-06 04:44:05,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:05,551 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:05,562 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] [2021-05-06 04:44:05,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:05,591 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:05,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05 WrapperNode [2021-05-06 04:44:05,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:05,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:05,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:05,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:05,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... [2021-05-06 04:44:05,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:05,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:05,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:05,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:05,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:05,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:05,989 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:05,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:05 BoogieIcfgContainer [2021-05-06 04:44:05,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:05,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:05,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:05,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:05,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:05" (1/3) ... [2021-05-06 04:44:05,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1041c67d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:05, skipping insertion in model container [2021-05-06 04:44:05,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:05" (2/3) ... [2021-05-06 04:44:05,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1041c67d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:05, skipping insertion in model container [2021-05-06 04:44:05,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:05" (3/3) ... [2021-05-06 04:44:05,997 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_valuebound1.c [2021-05-06 04:44:06,001 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:06,004 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:06,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:06,035 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:06,035 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:06,035 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:06,035 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:06,036 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:06,036 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:06,036 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:06,036 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:06,048 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) [2021-05-06 04:44:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:44:06,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:06,052 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:06,052 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 1 times [2021-05-06 04:44:06,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:06,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773653554] [2021-05-06 04:44:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:06,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:06,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:44:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:06,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:06,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773653554] [2021-05-06 04:44:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773653554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:06,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:06,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:06,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144832487] [2021-05-06 04:44:06,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:06,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:06,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:06,346 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) [2021-05-06 04:44:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:06,432 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 04:44:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:06,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:44:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:06,440 INFO L225 Difference]: With dead ends: 45 [2021-05-06 04:44:06,440 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 04:44:06,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 04:44:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 04:44:06,479 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) [2021-05-06 04:44:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-06 04:44:06,481 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-06 04:44:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:06,482 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-06 04:44:06,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-06 04:44:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:44:06,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:06,484 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:06,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:06,484 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:06,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 1 times [2021-05-06 04:44:06,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:06,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826292081] [2021-05-06 04:44:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:06,526 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:06,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579833492] [2021-05-06 04:44:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:06,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:06,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:06,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826292081] [2021-05-06 04:44:06,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579833492] [2021-05-06 04:44:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579833492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:06,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:06,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:06,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569383063] [2021-05-06 04:44:06,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:06,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:06,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:06,764 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:06,816 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-05-06 04:44:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:44:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:06,819 INFO L225 Difference]: With dead ends: 32 [2021-05-06 04:44:06,819 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 04:44:06,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 04:44:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 04:44:06,829 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) [2021-05-06 04:44:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-06 04:44:06,830 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-06 04:44:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:06,830 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-06 04:44:06,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:06,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-06 04:44:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:44:06,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:06,834 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] [2021-05-06 04:44:07,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:07,052 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash 276758134, now seen corresponding path program 1 times [2021-05-06 04:44:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:07,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491674068] [2021-05-06 04:44:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:07,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:07,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207067579] [2021-05-06 04:44:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:07,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:07,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:07,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491674068] [2021-05-06 04:44:07,207 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:07,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207067579] [2021-05-06 04:44:07,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207067579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:07,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:07,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325969909] [2021-05-06 04:44:07,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:07,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:07,209 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:44:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:07,265 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-05-06 04:44:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 04:44:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:07,267 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:44:07,267 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:44:07,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:44:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 04:44:07,288 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) [2021-05-06 04:44:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-06 04:44:07,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-06 04:44:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:07,290 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-06 04:44:07,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:44:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-06 04:44:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 04:44:07,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:07,291 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] [2021-05-06 04:44:07,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:07,505 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:07,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1640710638, now seen corresponding path program 2 times [2021-05-06 04:44:07,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:07,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793459706] [2021-05-06 04:44:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:07,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:07,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877031934] [2021-05-06 04:44:07,517 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 [2021-05-06 04:44:07,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:07,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:07,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 04:44:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:07,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:44:07,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:07,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793459706] [2021-05-06 04:44:07,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:07,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877031934] [2021-05-06 04:44:07,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877031934] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:07,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:07,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 04:44:07,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834688766] [2021-05-06 04:44:07,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:07,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:07,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:07,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:07,727 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) [2021-05-06 04:44:07,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:07,754 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-06 04:44:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:07,754 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 [2021-05-06 04:44:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:07,755 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:44:07,755 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 04:44:07,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 04:44:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 04:44:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 04:44:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 04:44:07,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-06 04:44:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:07,756 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 04:44:07,756 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) [2021-05-06 04:44:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 04:44:07,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 04:44:07,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:07,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 04:44:08,312 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 04:44:08,312 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 04:44:08,312 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 04:44:08,312 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:44:08,313 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 04:44:08,313 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:44:08,313 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:44:08,313 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 04:44:08,315 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 04:44:08,315 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:44:08,316 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-06 04:44:08,316 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-06 04:44:08,316 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:44:08,316 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:44:08,316 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 39) the Hoare annotation is: true [2021-05-06 04:44:08,316 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)))) [2021-05-06 04:44:08,316 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-06 04:44:08,317 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)))) [2021-05-06 04:44:08,317 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 39) no Hoare annotation was computed. [2021-05-06 04:44:08,317 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))) [2021-05-06 04:44:08,317 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-06 04:44:08,317 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-06 04:44:08,317 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 39) no Hoare annotation was computed. [2021-05-06 04:44:08,317 INFO L198 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-05-06 04:44:08,317 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-06 04:44:08,317 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-06 04:44:08,317 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-06 04:44:08,318 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:44:08,318 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:44:08,318 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-06 04:44:08,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:44:08 BoogieIcfgContainer [2021-05-06 04:44:08,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:44:08,335 INFO L168 Benchmark]: Toolchain (without parser) took 2972.96 ms. Allocated memory is still 205.5 MB. Free memory was 169.8 MB in the beginning and 107.9 MB in the end (delta: 61.9 MB). Peak memory consumption was 62.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:08,335 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 186.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:44:08,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.48 ms. Allocated memory is still 205.5 MB. Free memory was 169.6 MB in the beginning and 160.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:08,340 INFO L168 Benchmark]: Boogie Preprocessor took 91.23 ms. Allocated memory is still 205.5 MB. Free memory was 160.0 MB in the beginning and 188.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:08,340 INFO L168 Benchmark]: RCFGBuilder took 306.29 ms. Allocated memory is still 205.5 MB. Free memory was 188.8 MB in the beginning and 173.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:08,340 INFO L168 Benchmark]: TraceAbstraction took 2341.95 ms. Allocated memory is still 205.5 MB. Free memory was 173.0 MB in the beginning and 107.9 MB in the end (delta: 65.1 MB). Peak memory consumption was 66.2 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:08,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 186.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.48 ms. Allocated memory is still 205.5 MB. Free memory was 169.6 MB in the beginning and 160.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 91.23 ms. Allocated memory is still 205.5 MB. Free memory was 160.0 MB in the beginning and 188.8 MB in the end (delta: -28.8 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 306.29 ms. Allocated memory is still 205.5 MB. Free memory was 188.8 MB in the beginning and 173.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2341.95 ms. Allocated memory is still 205.5 MB. Free memory was 173.0 MB in the beginning and 107.9 MB in the end (delta: 65.1 MB). Peak memory consumption was 66.2 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: 1947.3ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 11.4ms, AutomataDifference: 260.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 330.9ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 31 SDslu, 184 SDs, 0 SdLazy, 71 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 166.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 17 PreInvPairs, 23 NumberOfFragments, 124 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 64.3ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 308 FormulaSimplificationTreeSizeReductionInter, 252.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 48.7ms SsaConstructionTime, 127.6ms SatisfiabilityAnalysisTime, 513.6ms InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 237 SizeOfPredicates, 4 NumberOfNonLiveVariables, 357 ConjunctsInSsa, 26 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...