/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/ps2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:34:46,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:34:46,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:34:46,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:34:46,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:34:46,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:34:46,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:34:46,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:34:46,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:34:46,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:34:46,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:34:46,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:34:46,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:34:46,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:34:46,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:34:46,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:34:46,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:34:46,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:34:46,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:34:46,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:34:46,226 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 04:34:46,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:34:46,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:34:46,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:34:46,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:34:46,258 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:34:46,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:34:46,258 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:34:46,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:34:46,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:34:46,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:34:46,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:34:46,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:34:46,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:34:46,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:34:46,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:34:46,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:34:46,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:34:46,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:34:46,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:34:46,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:34:46,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:34:46,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:34:46,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:34:46,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:34:46,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:34:46,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:34:46,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:34:46,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:34:46,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:34:46,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:34:46,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:34:46,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:34:46,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:34:46,514 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:34:46,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound1.c [2021-05-06 04:34:46,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f46ccc43/cb2058edeec34293a54a2e14d44545c6/FLAG63776c247 [2021-05-06 04:34:46,958 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:34:46,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound1.c [2021-05-06 04:34:46,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f46ccc43/cb2058edeec34293a54a2e14d44545c6/FLAG63776c247 [2021-05-06 04:34:46,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f46ccc43/cb2058edeec34293a54a2e14d44545c6 [2021-05-06 04:34:46,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:34:46,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:34:46,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:34:46,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:34:46,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:34:46,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:34:46" (1/1) ... [2021-05-06 04:34:46,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7791d0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:46, skipping insertion in model container [2021-05-06 04:34:46,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:34:46" (1/1) ... [2021-05-06 04:34:46,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:34:47,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:34:47,114 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/ps2-ll_valuebound1.c[454,467] [2021-05-06 04:34:47,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:34:47,129 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:34:47,137 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/ps2-ll_valuebound1.c[454,467] [2021-05-06 04:34:47,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:34:47,161 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:34:47,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47 WrapperNode [2021-05-06 04:34:47,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:34:47,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:34:47,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:34:47,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:34:47,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (1/1) ... [2021-05-06 04:34:47,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (1/1) ... [2021-05-06 04:34:47,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (1/1) ... [2021-05-06 04:34:47,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (1/1) ... [2021-05-06 04:34:47,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (1/1) ... [2021-05-06 04:34:47,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (1/1) ... [2021-05-06 04:34:47,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (1/1) ... [2021-05-06 04:34:47,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:34:47,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:34:47,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:34:47,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:34:47,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (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 04:34:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:34:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:34:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:34:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:34:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:34:47,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:34:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:34:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:34:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:34:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:34:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:34:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:34:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:34:47,489 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:34:47,489 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:34:47,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:34:47 BoogieIcfgContainer [2021-05-06 04:34:47,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:34:47,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:34:47,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:34:47,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:34:47,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:34:46" (1/3) ... [2021-05-06 04:34:47,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ce4f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:34:47, skipping insertion in model container [2021-05-06 04:34:47,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:34:47" (2/3) ... [2021-05-06 04:34:47,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ce4f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:34:47, skipping insertion in model container [2021-05-06 04:34:47,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:34:47" (3/3) ... [2021-05-06 04:34:47,495 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound1.c [2021-05-06 04:34:47,498 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:34:47,500 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:34:47,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:34:47,553 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:34:47,554 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:34:47,554 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:34:47,554 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:34:47,554 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:34:47,554 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:34:47,554 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:34:47,554 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:34:47,589 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 04:34:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:34:47,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:34:47,593 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 04:34:47,593 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:34:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:34:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 1 times [2021-05-06 04:34:47,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:34:47,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426527398] [2021-05-06 04:34:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:34:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:34:47,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:34:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:34:47,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:34:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:34:47,810 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 04:34:47,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:34:47,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426527398] [2021-05-06 04:34:47,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426527398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:34:47,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:34:47,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:34:47,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107008717] [2021-05-06 04:34:47,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:34:47,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:34:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:34:47,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:34:47,824 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 04:34:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:34:47,866 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 04:34:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:34:47,867 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 04:34:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:34:47,872 INFO L225 Difference]: With dead ends: 45 [2021-05-06 04:34:47,872 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 04:34:47,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:34:47,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 04:34:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 04:34:47,895 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 04:34:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-06 04:34:47,896 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-06 04:34:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:34:47,897 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-06 04:34:47,897 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 04:34:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-06 04:34:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:34:47,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:34:47,897 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 04:34:47,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:34:47,898 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:34:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:34:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 1 times [2021-05-06 04:34:47,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:34:47,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759618773] [2021-05-06 04:34:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:34:47,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:34:47,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062446828] [2021-05-06 04:34:47,912 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 04:34:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:34:47,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:34:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:34:48,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,044 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 04:34:48,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:34:48,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759618773] [2021-05-06 04:34:48,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:34:48,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062446828] [2021-05-06 04:34:48,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062446828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:34:48,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:34:48,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:34:48,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685115071] [2021-05-06 04:34:48,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:34:48,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:34:48,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:34:48,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:34:48,047 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 04:34:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:34:48,087 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-05-06 04:34:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:34:48,087 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 04:34:48,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:34:48,089 INFO L225 Difference]: With dead ends: 32 [2021-05-06 04:34:48,089 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 04:34:48,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:34:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 04:34:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 04:34:48,107 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 04:34:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-06 04:34:48,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-06 04:34:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:34:48,108 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-06 04:34:48,108 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 04:34:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-06 04:34:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:34:48,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:34:48,109 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 04:34:48,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:34:48,309 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:34:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:34:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash 276758134, now seen corresponding path program 1 times [2021-05-06 04:34:48,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:34:48,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364846088] [2021-05-06 04:34:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:34:48,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:34:48,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479111121] [2021-05-06 04:34:48,322 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 04:34:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:34:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:34:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:34:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,448 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 04:34:48,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:34:48,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364846088] [2021-05-06 04:34:48,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:34:48,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479111121] [2021-05-06 04:34:48,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479111121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:34:48,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:34:48,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:34:48,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522976257] [2021-05-06 04:34:48,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:34:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:34:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:34:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:34:48,451 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 04:34:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:34:48,492 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-05-06 04:34:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:34:48,493 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 04:34:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:34:48,493 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:34:48,493 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:34:48,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:34:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:34:48,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 04:34:48,501 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 04:34:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-06 04:34:48,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-06 04:34:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:34:48,503 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-06 04:34:48,504 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 04:34:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-06 04:34:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 04:34:48,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:34:48,505 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 04:34:48,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:34:48,721 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:34:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:34:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1640710638, now seen corresponding path program 2 times [2021-05-06 04:34:48,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:34:48,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955213683] [2021-05-06 04:34:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:34:48,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:34:48,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745919261] [2021-05-06 04:34:48,730 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 04:34:48,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:34:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:34:48,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 04:34:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:34:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:34:48,903 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 04:34:48,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:34:48,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955213683] [2021-05-06 04:34:48,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:34:48,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745919261] [2021-05-06 04:34:48,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745919261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:34:48,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:34:48,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 04:34:48,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218616883] [2021-05-06 04:34:48,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:34:48,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:34:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:34:48,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:34:48,904 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 04:34:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:34:48,930 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-06 04:34:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:34:48,931 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 04:34:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:34:48,931 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:34:48,931 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 04:34:48,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:34:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 04:34:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 04:34:48,932 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 04:34:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 04:34:48,932 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-06 04:34:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:34:48,932 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 04:34:48,932 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 04:34:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 04:34:48,932 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 04:34:49,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:34:49,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 04:34:49,365 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 04:34:49,365 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:34:49,366 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 04:34:49,366 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 04:34:49,366 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 04:34:49,366 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-06 04:34:49,366 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:34:49,366 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2021-05-06 04:34:49,367 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 .cse1 (= main_~y~0 1) (= main_~y~0 main_~x~0)))) [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-06 04:34:49,367 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 .cse1 (= main_~y~0 1) (= main_~y~0 main_~x~0)))) [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:34:49,367 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (and (= main_~y~0 1) (= main_~y~0 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-06 04:34:49,367 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-05-06 04:34:49,367 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:34:49,367 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:34:49,368 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-06 04:34:49,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:34:49 BoogieIcfgContainer [2021-05-06 04:34:49,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:34:49,377 INFO L168 Benchmark]: Toolchain (without parser) took 2397.97 ms. Allocated memory is still 190.8 MB. Free memory was 154.6 MB in the beginning and 83.2 MB in the end (delta: 71.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. [2021-05-06 04:34:49,377 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 190.8 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:34:49,377 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.88 ms. Allocated memory is still 190.8 MB. Free memory was 154.3 MB in the beginning and 174.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-06 04:34:49,377 INFO L168 Benchmark]: Boogie Preprocessor took 54.61 ms. Allocated memory is still 190.8 MB. Free memory was 174.5 MB in the beginning and 172.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:34:49,378 INFO L168 Benchmark]: RCFGBuilder took 272.77 ms. Allocated memory is still 190.8 MB. Free memory was 172.4 MB in the beginning and 158.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 04:34:49,378 INFO L168 Benchmark]: TraceAbstraction took 1885.41 ms. Allocated memory is still 190.8 MB. Free memory was 158.2 MB in the beginning and 83.2 MB in the end (delta: 75.1 MB). Peak memory consumption was 76.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:34:49,378 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 190.8 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 179.88 ms. Allocated memory is still 190.8 MB. Free memory was 154.3 MB in the beginning and 174.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.61 ms. Allocated memory is still 190.8 MB. Free memory was 174.5 MB in the beginning and 172.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.77 ms. Allocated memory is still 190.8 MB. Free memory was 172.4 MB in the beginning and 158.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1885.41 ms. Allocated memory is still 190.8 MB. Free memory was 158.2 MB in the beginning and 83.2 MB in the end (delta: 75.1 MB). Peak memory consumption was 76.1 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: 1593.3ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 18.9ms, AutomataDifference: 173.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 219.7ms, InitialAbstractionConstructionTime: 21.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 31 SDslu, 184 SDs, 0 SdLazy, 71 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 104.2ms 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: 37.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 17 PreInvPairs, 23 NumberOfFragments, 118 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 59.7ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 308 FormulaSimplificationTreeSizeReductionInter, 153.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 28.8ms SsaConstructionTime, 89.9ms SatisfiabilityAnalysisTime, 367.9ms InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 233 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) && 0 <= k) && y == 1) && y == x) RESULT: Ultimate proved your program to be correct! Received shutdown request...