/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/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:25:08,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:25:08,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:25:08,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:25:08,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:25:08,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:25:08,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:25:08,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:25:08,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:25:08,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:25:08,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:25:08,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:25:08,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:25:08,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:25:08,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:25:08,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:25:08,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:25:08,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:25:08,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:25:08,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:25:08,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 16:25:08,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:25:08,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:25:08,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:25:08,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:25:08,566 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:25:08,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:25:08,566 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:25:08,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:25:08,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:25:08,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:25:08,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:25:08,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:25:08,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:25:08,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:25:08,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:25:08,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:25:08,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:25:08,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:25:08,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:25:08,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:25:08,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:25:08,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:25:08,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:25:08,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:25:08,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:25:08,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:25:08,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:25:08,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:25:08,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:25:08,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:25:08,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:25:08,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:25:08,928 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:25:08,929 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:25:08,930 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-02 16:25:08,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c27acbc94/18198004e21a4070b66e9dfaa6d5cfe8/FLAGb10d9c5f3 [2021-05-02 16:25:09,353 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:25:09,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-02 16:25:09,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c27acbc94/18198004e21a4070b66e9dfaa6d5cfe8/FLAGb10d9c5f3 [2021-05-02 16:25:09,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c27acbc94/18198004e21a4070b66e9dfaa6d5cfe8 [2021-05-02 16:25:09,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:25:09,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:25:09,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:25:09,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:25:09,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:25:09,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:09,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77acb8a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09, skipping insertion in model container [2021-05-02 16:25:09,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:09,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:25:09,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:25:09,932 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-02 16:25:09,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:25:09,955 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:25:09,966 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-02 16:25:09,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:25:09,994 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:25:09,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09 WrapperNode [2021-05-02 16:25:09,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:25:09,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:25:09,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:25:09,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:25:10,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:10,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:10,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:10,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:10,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:10,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:10,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... [2021-05-02 16:25:10,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:25:10,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:25:10,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:25:10,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:25:10,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:25:10,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:25:10,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:25:10,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:25:10,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:25:10,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:25:10,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:25:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:25:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:25:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:25:10,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:25:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:25:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:25:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:25:10,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:25:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:25:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:25:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:25:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:25:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:25:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:25:10,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:25:10,399 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:25:10,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:25:10 BoogieIcfgContainer [2021-05-02 16:25:10,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:25:10,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:25:10,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:25:10,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:25:10,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:25:09" (1/3) ... [2021-05-02 16:25:10,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdfac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:25:10, skipping insertion in model container [2021-05-02 16:25:10,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:25:09" (2/3) ... [2021-05-02 16:25:10,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cdfac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:25:10, skipping insertion in model container [2021-05-02 16:25:10,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:25:10" (3/3) ... [2021-05-02 16:25:10,406 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.c [2021-05-02 16:25:10,410 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:25:10,421 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:25:10,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:25:10,461 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:25:10,462 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:25:10,462 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:25:10,462 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:25:10,462 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:25:10,462 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:25:10,462 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:25:10,462 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:25:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:25:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:25:10,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:10,479 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:25:10,479 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:10,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2021-05-02 16:25:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:10,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988780131] [2021-05-02 16:25:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:10,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:25:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:10,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:25:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:10,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:10,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988780131] [2021-05-02 16:25:10,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988780131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:25:10,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:25:10,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:25:10,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613275729] [2021-05-02 16:25:10,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:25:10,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:25:10,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:25:10,676 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:25:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:10,740 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 16:25:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:25:10,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:25:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:10,747 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:25:10,747 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:25:10,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:25:10,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:25:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 16:25:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:25:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 16:25:10,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 16:25:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:10,787 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 16:25:10,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:25:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 16:25:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:25:10,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:10,789 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 16:25:10,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:25:10,789 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:10,790 INFO L82 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2021-05-02 16:25:10,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:10,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251414695] [2021-05-02 16:25:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:10,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:10,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694612714] [2021-05-02 16:25:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:10,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:25:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:10,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:10,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:10,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:11,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:11,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:11,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:11,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251414695] [2021-05-02 16:25:11,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:11,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694612714] [2021-05-02 16:25:11,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694612714] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:25:11,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:25:11,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:25:11,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915282935] [2021-05-02 16:25:11,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:25:11,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:25:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:25:11,028 INFO L87 Difference]: Start difference. First operand 25 states and 28 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 16:25:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:11,040 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 16:25:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:25:11,041 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 16:25:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:11,042 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:25:11,042 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:25:11,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:25:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:25:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:25:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:25:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 16:25:11,049 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 16:25:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:11,049 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 16:25:11,049 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 16:25:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 16:25:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:25:11,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:11,050 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 16:25:11,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:25:11,269 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:11,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:11,270 INFO L82 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2021-05-02 16:25:11,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:11,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712799388] [2021-05-02 16:25:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:11,285 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:11,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207449638] [2021-05-02 16:25:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:25:11,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:25:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:25:11,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:11,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:25:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:25:11,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:25:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712799388] [2021-05-02 16:25:11,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:25:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207449638] [2021-05-02 16:25:11,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207449638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:25:11,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:25:11,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 16:25:11,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113664246] [2021-05-02 16:25:11,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:25:11,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:25:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:25:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:25:11,495 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) 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), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:25:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:25:11,590 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 16:25:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:25:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) 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), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 16:25:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:25:11,592 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:25:11,592 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:25:11,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:25:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:25:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 16:25:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:25:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 16:25:11,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 16:25:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:25:11,599 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 16:25:11,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) 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), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:25:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 16:25:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:25:11,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:25:11,600 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, 1, 1] [2021-05-02 16:25:11,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:11,801 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:25:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:25:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2021-05-02 16:25:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:25:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216314291] [2021-05-02 16:25:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:25:11,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:25:11,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119271496] [2021-05-02 16:25:11,816 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 16:25:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:25:11,872 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:25:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:25:11,889 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:25:11,926 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 16:25:11,926 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 16:25:12,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:25:12,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:25:12 BoogieIcfgContainer [2021-05-02 16:25:12,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:25:12,182 INFO L168 Benchmark]: Toolchain (without parser) took 2395.18 ms. Allocated memory is still 172.0 MB. Free memory was 136.3 MB in the beginning and 126.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 8.0 GB. [2021-05-02 16:25:12,182 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 172.0 MB. Free memory is still 152.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:25:12,182 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.27 ms. Allocated memory is still 172.0 MB. Free memory was 136.1 MB in the beginning and 126.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 16:25:12,183 INFO L168 Benchmark]: Boogie Preprocessor took 62.31 ms. Allocated memory is still 172.0 MB. Free memory was 126.1 MB in the beginning and 155.0 MB in the end (delta: -28.8 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. [2021-05-02 16:25:12,183 INFO L168 Benchmark]: RCFGBuilder took 340.88 ms. Allocated memory is still 172.0 MB. Free memory was 155.0 MB in the beginning and 139.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:25:12,183 INFO L168 Benchmark]: TraceAbstraction took 1780.42 ms. Allocated memory is still 172.0 MB. Free memory was 139.2 MB in the beginning and 126.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-05-02 16:25:12,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 172.0 MB. Free memory is still 152.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 205.27 ms. Allocated memory is still 172.0 MB. Free memory was 136.1 MB in the beginning and 126.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.31 ms. Allocated memory is still 172.0 MB. Free memory was 126.1 MB in the beginning and 155.0 MB in the end (delta: -28.8 MB). Peak memory consumption was 3.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.88 ms. Allocated memory is still 172.0 MB. Free memory was 155.0 MB in the beginning and 139.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1780.42 ms. Allocated memory is still 172.0 MB. Free memory was 139.2 MB in the beginning and 126.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=17, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=1, b=2, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=1, b=2, counter=0, x=1, y=2, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=1, counter++=0, x=1, y=2, z=0] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=1, b=2, counter=1, x=1, y=2, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=1, b=2, counter=1, x=1, y=2, z=0] [L38] COND FALSE !(y % 2 == 1) VAL [\old(counter)=0, a=1, b=2, counter=1, x=1, y=2, z=0] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=1, b=2, counter=1, x=2, y=1, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=2, counter++=1, x=2, y=1, z=0] [L33] COND FALSE !(counter++<1) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1690.4ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 8.3ms, AutomataDifference: 197.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 75 SDtfs, 32 SDslu, 128 SDs, 0 SdLazy, 87 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 98.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 105.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.2ms SsaConstructionTime, 116.3ms SatisfiabilityAnalysisTime, 323.0ms InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 157 SizeOfPredicates, 3 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...