/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/cohencu-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:54:17,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:54:17,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:54:17,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:54:17,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:54:17,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:54:17,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:54:17,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:54:17,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:54:17,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:54:17,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:54:17,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:54:17,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:54:17,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:54:17,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:54:17,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:54:17,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:54:17,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:54:17,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:54:17,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:54:17,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:54:17,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:54:17,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:54:17,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:54:17,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:54:17,608 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:54:17,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:54:17,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:54:17,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:54:17,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:54:17,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:54:17,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:54:17,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:54:17,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:54:17,610 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:54:17,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:54:17,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:54:17,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:54:17,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:54:17,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:54:17,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:54:17,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:54:17,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:54:17,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:54:17,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:54:17,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:54:17,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:54:17,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:54:17,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:54:17,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:54:17,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:54:17,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:54:17,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:54:17,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:54:17,883 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:54:17,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2021-05-02 13:54:17,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363ef385d/f2c45179ab6b4103bd5422884d01c1fc/FLAG86f8095dd [2021-05-02 13:54:18,275 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:54:18,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2021-05-02 13:54:18,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363ef385d/f2c45179ab6b4103bd5422884d01c1fc/FLAG86f8095dd [2021-05-02 13:54:18,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/363ef385d/f2c45179ab6b4103bd5422884d01c1fc [2021-05-02 13:54:18,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:54:18,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:54:18,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:54:18,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:54:18,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:54:18,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c26dfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18, skipping insertion in model container [2021-05-02 13:54:18,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:54:18,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:54:18,789 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/cohencu-ll_unwindbound1.c[596,609] [2021-05-02 13:54:18,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:54:18,806 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:54:18,813 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/cohencu-ll_unwindbound1.c[596,609] [2021-05-02 13:54:18,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:54:18,828 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:54:18,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18 WrapperNode [2021-05-02 13:54:18,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:54:18,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:54:18,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:54:18,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:54:18,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... [2021-05-02 13:54:18,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:54:18,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:54:18,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:54:18,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:54:18,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:54:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:54:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:54:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:54:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:54:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:54:18,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:54:18,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:54:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:54:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:54:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:54:19,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:54:19,177 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:54:19,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:54:19 BoogieIcfgContainer [2021-05-02 13:54:19,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:54:19,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:54:19,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:54:19,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:54:19,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:54:18" (1/3) ... [2021-05-02 13:54:19,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e47ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:54:19, skipping insertion in model container [2021-05-02 13:54:19,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:54:18" (2/3) ... [2021-05-02 13:54:19,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e47ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:54:19, skipping insertion in model container [2021-05-02 13:54:19,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:54:19" (3/3) ... [2021-05-02 13:54:19,182 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound1.c [2021-05-02 13:54:19,185 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:54:19,187 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:54:19,197 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:54:19,210 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:54:19,210 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:54:19,210 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:54:19,210 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:54:19,210 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:54:19,210 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:54:19,210 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:54:19,210 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:54:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:54:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:54:19,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:19,224 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:54:19,224 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:19,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:19,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1839589780, now seen corresponding path program 1 times [2021-05-02 13:54:19,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:19,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565490424] [2021-05-02 13:54:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:54:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:19,392 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 13:54:19,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:54:19,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565490424] [2021-05-02 13:54:19,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565490424] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:54:19,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:54:19,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:54:19,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674955106] [2021-05-02 13:54:19,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:54:19,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:54:19,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:54:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:54:19,406 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:54:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:19,530 INFO L93 Difference]: Finished difference Result 57 states and 95 transitions. [2021-05-02 13:54:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:54:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:54:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:19,537 INFO L225 Difference]: With dead ends: 57 [2021-05-02 13:54:19,537 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 13:54:19,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:54:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 13:54:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 13:54:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:54:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-05-02 13:54:19,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2021-05-02 13:54:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:19,565 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-05-02 13:54:19,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:54:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-05-02 13:54:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:54:19,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:19,566 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:54:19,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:54:19,566 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash 660459433, now seen corresponding path program 1 times [2021-05-02 13:54:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:19,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485494863] [2021-05-02 13:54:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:19,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:54:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:19,667 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 13:54:19,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:54:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485494863] [2021-05-02 13:54:19,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485494863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:54:19,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:54:19,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:54:19,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011355967] [2021-05-02 13:54:19,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:54:19,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:54:19,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:54:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:54:19,670 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:54:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:19,812 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-05-02 13:54:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:54:19,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:54:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:19,814 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:54:19,814 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 13:54:19,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:54:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 13:54:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 13:54:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:54:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-05-02 13:54:19,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2021-05-02 13:54:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:19,821 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-05-02 13:54:19,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:54:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2021-05-02 13:54:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:54:19,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:19,821 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:54:19,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:54:19,822 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash 662008565, now seen corresponding path program 1 times [2021-05-02 13:54:19,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:19,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178398850] [2021-05-02 13:54:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:19,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:54:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:19,903 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 13:54:19,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:54:19,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178398850] [2021-05-02 13:54:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178398850] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:54:19,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:54:19,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:54:19,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838620467] [2021-05-02 13:54:19,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:54:19,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:54:19,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:54:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:54:19,905 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:54:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:20,107 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-05-02 13:54:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:54:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:54:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:20,111 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:54:20,111 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 13:54:20,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:54:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 13:54:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 13:54:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:54:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 13:54:20,132 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 13:54:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:20,133 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 13:54:20,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:54:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 13:54:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:54:20,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:20,134 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:54:20,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 13:54:20,134 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2023221563, now seen corresponding path program 1 times [2021-05-02 13:54:20,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:20,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855248081] [2021-05-02 13:54:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:20,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:54:20,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244949048] [2021-05-02 13:54:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:20,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:54:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:54:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:54:20,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:54:20,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855248081] [2021-05-02 13:54:20,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:54:20,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244949048] [2021-05-02 13:54:20,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244949048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:54:20,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:54:20,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:54:20,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743717076] [2021-05-02 13:54:20,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:54:20,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:54:20,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:54:20,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:54:20,297 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:54:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:20,511 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-05-02 13:54:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:54:20,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 13:54:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:20,512 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:54:20,512 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 13:54:20,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:54:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 13:54:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 13:54:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 13:54:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-05-02 13:54:20,520 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 17 [2021-05-02 13:54:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:20,520 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-05-02 13:54:20,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:54:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-05-02 13:54:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:54:20,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:20,521 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:54:20,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:20,733 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1612678773, now seen corresponding path program 1 times [2021-05-02 13:54:20,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:20,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968105234] [2021-05-02 13:54:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:20,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:54:20,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946381415] [2021-05-02 13:54:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:20,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:54:20,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:54:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:54:20,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:54:20,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968105234] [2021-05-02 13:54:20,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:54:20,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946381415] [2021-05-02 13:54:20,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946381415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:54:20,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:54:20,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:54:20,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789597526] [2021-05-02 13:54:20,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:54:20,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:54:20,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:54:20,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:54:20,895 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:54:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:23,105 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-05-02 13:54:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:54:23,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 13:54:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:23,106 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:54:23,106 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:54:23,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:54:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:54:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 13:54:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 13:54:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 13:54:23,114 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 13:54:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:23,114 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 13:54:23,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:54:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 13:54:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:54:23,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:23,115 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:54:23,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:23,321 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1625830715, now seen corresponding path program 1 times [2021-05-02 13:54:23,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:23,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137609629] [2021-05-02 13:54:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:23,329 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:54:23,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452513824] [2021-05-02 13:54:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:54:23,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:54:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:54:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:54:23,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:54:23,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137609629] [2021-05-02 13:54:23,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:54:23,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452513824] [2021-05-02 13:54:23,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452513824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:54:23,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:54:23,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:54:23,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709557548] [2021-05-02 13:54:23,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:54:23,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:54:23,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:54:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:54:23,493 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:54:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:23,671 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-05-02 13:54:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:54:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 13:54:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:23,672 INFO L225 Difference]: With dead ends: 62 [2021-05-02 13:54:23,672 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 13:54:23,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:54:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 13:54:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 13:54:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 13:54:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-02 13:54:23,684 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 27 [2021-05-02 13:54:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:23,684 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-02 13:54:23,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:54:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-02 13:54:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 13:54:23,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:54:23,686 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 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 13:54:23,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:23,903 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:54:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:54:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1440923632, now seen corresponding path program 1 times [2021-05-02 13:54:23,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:54:23,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875377203] [2021-05-02 13:54:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:54:23,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:54:23,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333760502] [2021-05-02 13:54:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 13:54:23,957 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 13:54:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 13:54:23,968 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 13:54:24,003 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 13:54:24,003 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 13:54:24,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:54:24,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:54:24 BoogieIcfgContainer [2021-05-02 13:54:24,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:54:24,227 INFO L168 Benchmark]: Toolchain (without parser) took 5533.32 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 167.7 MB in the beginning and 124.5 MB in the end (delta: 43.2 MB). Peak memory consumption was 85.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:24,227 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 204.5 MB. Free memory is still 184.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:54:24,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.74 ms. Allocated memory is still 204.5 MB. Free memory was 167.5 MB in the beginning and 157.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:24,227 INFO L168 Benchmark]: Boogie Preprocessor took 66.07 ms. Allocated memory is still 204.5 MB. Free memory was 157.3 MB in the beginning and 186.7 MB in the end (delta: -29.3 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:24,227 INFO L168 Benchmark]: RCFGBuilder took 282.34 ms. Allocated memory is still 204.5 MB. Free memory was 186.7 MB in the beginning and 170.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:24,228 INFO L168 Benchmark]: TraceAbstraction took 5048.05 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.9 MB in the beginning and 124.5 MB in the end (delta: 45.4 MB). Peak memory consumption was 87.9 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:24,228 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 204.5 MB. Free memory is still 184.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 131.74 ms. Allocated memory is still 204.5 MB. Free memory was 167.5 MB in the beginning and 157.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.07 ms. Allocated memory is still 204.5 MB. Free memory was 157.3 MB in the beginning and 186.7 MB in the end (delta: -29.3 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.34 ms. Allocated memory is still 204.5 MB. Free memory was 186.7 MB in the beginning and 170.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5048.05 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.9 MB in the beginning and 124.5 MB in the end (delta: 45.4 MB). Peak memory consumption was 87.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=19, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_unsigned_short() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=1, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=1, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND FALSE !(counter++<1) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=1, counter=2, n=1, x=1, y=7, z=12] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4995.5ms, OverallIterations: 7, TraceHistogramMax: 7, EmptinessCheckTime: 9.4ms, AutomataDifference: 3104.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 184 SDtfs, 73 SDslu, 411 SDs, 0 SdLazy, 629 SolverSat, 78 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2656.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 358.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=5, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 67.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 40.8ms SsaConstructionTime, 117.1ms SatisfiabilityAnalysisTime, 535.3ms InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 401 SizeOfPredicates, 9 NumberOfNonLiveVariables, 369 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 16/28 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...