/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/ps5-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:00:20,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:00:20,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:00:20,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:00:20,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:00:20,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:00:20,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:00:20,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:00:20,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:00:20,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:00:20,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:00:20,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:00:20,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:00:20,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:00:20,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:00:20,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:00:20,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:00:20,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:00:20,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:00:20,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:00:20,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 17:00:20,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:00:20,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:00:20,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:00:20,974 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:00:20,974 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:00:20,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:00:20,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:00:20,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:00:20,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:00:20,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:00:20,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:00:20,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:00:20,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:00:20,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:00:20,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:00:20,978 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:00:20,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:00:20,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:00:20,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:00:20,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:00:20,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:00:20,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:00:20,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:00:20,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:00:20,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:00:20,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:00:20,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:00:20,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:00:20,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:00:21,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:00:21,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:00:21,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:00:21,322 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:00:21,323 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:00:21,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-05-02 17:00:21,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429b3b8b2/d8b6e1053b0a45b1bcc15d78385eccb1/FLAG126d198ea [2021-05-02 17:00:21,917 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:00:21,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound1.c [2021-05-02 17:00:21,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429b3b8b2/d8b6e1053b0a45b1bcc15d78385eccb1/FLAG126d198ea [2021-05-02 17:00:22,413 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429b3b8b2/d8b6e1053b0a45b1bcc15d78385eccb1 [2021-05-02 17:00:22,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:00:22,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:00:22,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:00:22,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:00:22,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:00:22,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8878dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22, skipping insertion in model container [2021-05-02 17:00:22,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:00:22,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:00:22,560 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/ps5-ll_unwindbound1.c[458,471] [2021-05-02 17:00:22,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:00:22,583 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:00:22,606 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/ps5-ll_unwindbound1.c[458,471] [2021-05-02 17:00:22,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:00:22,624 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:00:22,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22 WrapperNode [2021-05-02 17:00:22,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:00:22,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:00:22,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:00:22,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:00:22,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... [2021-05-02 17:00:22,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:00:22,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:00:22,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:00:22,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:00:22,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:00:22,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:00:22,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:00:22,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:00:22,770 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:00:22,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:00:22,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:00:22,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:00:22,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:00:22,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:00:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:00:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:00:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:00:22,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:00:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:00:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:00:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:00:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:00:22,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:00:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:00:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:00:23,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:00:23,069 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:00:23,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:00:23 BoogieIcfgContainer [2021-05-02 17:00:23,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:00:23,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:00:23,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:00:23,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:00:23,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:00:22" (1/3) ... [2021-05-02 17:00:23,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3953e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:00:23, skipping insertion in model container [2021-05-02 17:00:23,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:00:22" (2/3) ... [2021-05-02 17:00:23,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3953e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:00:23, skipping insertion in model container [2021-05-02 17:00:23,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:00:23" (3/3) ... [2021-05-02 17:00:23,094 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound1.c [2021-05-02 17:00:23,099 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:00:23,102 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:00:23,135 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:00:23,172 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:00:23,172 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:00:23,172 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:00:23,173 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:00:23,173 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:00:23,173 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:00:23,173 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:00:23,173 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:00:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:00:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:00:23,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:23,193 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:23,194 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2021-05-02 17:00:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:23,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212824177] [2021-05-02 17:00:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:23,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:00:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:23,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:00:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:23,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:23,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212824177] [2021-05-02 17:00:23,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212824177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:00:23,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:00:23,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:00:23,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303955770] [2021-05-02 17:00:23,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:00:23,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:23,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:00:23,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:00:23,427 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:23,536 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-05-02 17:00:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:00:23,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:00:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:23,545 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:00:23,545 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 17:00:23,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:00:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 17:00:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 17:00:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:00:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:00:23,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 17:00:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:23,586 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:00:23,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:00:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:00:23,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:23,588 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:23,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:00:23,589 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:23,590 INFO L82 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2021-05-02 17:00:23,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:23,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097983871] [2021-05-02 17:00:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:23,630 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:23,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126106840] [2021-05-02 17:00:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:00:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:23,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:23,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:23,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:23,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:23,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:23,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097983871] [2021-05-02 17:00:23,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126106840] [2021-05-02 17:00:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126106840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:00:23,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:00:23,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:00:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361471653] [2021-05-02 17:00:23,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:00:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:00:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:00:23,892 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:00:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:23,907 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 17:00:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:00:23,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 17:00:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:23,908 INFO L225 Difference]: With dead ends: 34 [2021-05-02 17:00:23,908 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:00:23,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:00:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:00:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:00:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:00:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 17:00:23,917 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-02 17:00:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:23,917 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 17:00:23,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:00:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 17:00:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:00:23,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:23,918 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:24,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:00:24,129 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:24,130 INFO L82 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2021-05-02 17:00:24,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:24,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056689247] [2021-05-02 17:00:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:24,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:24,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165789852] [2021-05-02 17:00:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:00:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:24,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:24,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:24,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056689247] [2021-05-02 17:00:24,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:24,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165789852] [2021-05-02 17:00:24,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165789852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:00:24,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:00:24,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 17:00:24,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076112531] [2021-05-02 17:00:24,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:00:24,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:24,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:00:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:00:24,322 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:24,406 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 17:00:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:00:24,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 17:00:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:24,408 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:00:24,408 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:00:24,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:00:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:00:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 17:00:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:00:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 17:00:24,417 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-02 17:00:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:24,417 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 17:00:24,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:00:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 17:00:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:00:24,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:24,418 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:24,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:24,633 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:24,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2021-05-02 17:00:24,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:24,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813275577] [2021-05-02 17:00:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:24,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:24,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322601027] [2021-05-02 17:00:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:00:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:24,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:24,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:24,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813275577] [2021-05-02 17:00:24,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:24,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322601027] [2021-05-02 17:00:24,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322601027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:24,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:24,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:00:24,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124431008] [2021-05-02 17:00:24,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:00:24,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:24,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:00:24,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:00:24,901 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:00:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:25,016 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-05-02 17:00:25,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:00:25,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 17:00:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:25,020 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:00:25,020 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:00:25,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:00:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:00:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 17:00:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:00:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-02 17:00:25,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 26 [2021-05-02 17:00:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:25,034 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-02 17:00:25,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:00:25,034 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-02 17:00:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 17:00:25,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:25,036 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:25,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:25,240 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1589507521, now seen corresponding path program 1 times [2021-05-02 17:00:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:25,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125683820] [2021-05-02 17:00:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:25,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:25,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882718518] [2021-05-02 17:00:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:00:25,305 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:00:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:00:25,325 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:00:25,362 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 17:00:25,362 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 17:00:25,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:25,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:00:25 BoogieIcfgContainer [2021-05-02 17:00:25,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:00:25,609 INFO L168 Benchmark]: Toolchain (without parser) took 3189.62 ms. Allocated memory is still 202.4 MB. Free memory was 166.4 MB in the beginning and 135.0 MB in the end (delta: 31.3 MB). Peak memory consumption was 31.9 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:25,609 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:00:25,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 201.34 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 185.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:25,609 INFO L168 Benchmark]: Boogie Preprocessor took 42.74 ms. Allocated memory is still 202.4 MB. Free memory was 185.3 MB in the beginning and 183.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:25,610 INFO L168 Benchmark]: RCFGBuilder took 382.17 ms. Allocated memory is still 202.4 MB. Free memory was 183.8 MB in the beginning and 168.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:25,610 INFO L168 Benchmark]: TraceAbstraction took 2536.43 ms. Allocated memory is still 202.4 MB. Free memory was 168.0 MB in the beginning and 135.0 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:00:25,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 201.34 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 185.3 MB in the end (delta: -19.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.74 ms. Allocated memory is still 202.4 MB. Free memory was 185.3 MB in the beginning and 183.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 382.17 ms. Allocated memory is still 202.4 MB. Free memory was 183.8 MB in the beginning and 168.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2536.43 ms. Allocated memory is still 202.4 MB. Free memory was 168.0 MB in the beginning and 135.0 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=6, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L7] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) VAL [\old(counter)=0, counter=0, k=2] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=2, x=0, y=0] [L28] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=2, x=0, y=0] [L28] COND TRUE counter++<1 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L29] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=0, counter=1, k=2, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=2, x=1, y=1] [L28] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=2, x=1, y=1] [L28] COND FALSE !(counter++<1) [L39] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L39] RET __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) VAL [\old(counter)=0, c=1, counter=2, k=2, x=1, y=1] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2402.7ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 12.2ms, AutomataDifference: 359.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 102 SDtfs, 27 SDslu, 277 SDs, 0 SdLazy, 132 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 166.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 170.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 53.2ms SsaConstructionTime, 184.8ms SatisfiabilityAnalysisTime, 535.5ms InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 7 NumberOfNonLiveVariables, 363 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...