/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/mannadiv_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:09:07,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:09:07,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:09:07,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:09:07,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:09:07,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:09:07,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:09:07,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:09:07,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:09:07,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:09:07,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:09:07,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:09:07,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:09:07,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:09:07,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:09:07,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:09:07,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:09:07,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:09:07,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:09:07,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:09:07,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:09:07,549 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:09:07,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:09:07,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:09:07,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:09:07,552 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:09:07,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:09:07,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:09:07,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:09:07,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:09:07,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:09:07,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:09:07,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:09:07,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:09:07,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:09:07,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:09:07,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:09:07,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:09:07,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:09:07,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:09:07,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:09:07,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:09:07,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:09:07,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:09:07,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:09:07,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:09:07,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:09:07,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:09:07,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:09:07,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:09:07,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:09:07,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:09:07,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:09:07,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:09:07,989 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:09:07,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound1.c [2021-05-06 04:09:08,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c905417a/cb2b53e5075945cc95e18d49024e40f5/FLAG2bca8922e [2021-05-06 04:09:08,393 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:09:08,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound1.c [2021-05-06 04:09:08,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c905417a/cb2b53e5075945cc95e18d49024e40f5/FLAG2bca8922e [2021-05-06 04:09:08,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c905417a/cb2b53e5075945cc95e18d49024e40f5 [2021-05-06 04:09:08,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:09:08,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:09:08,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:09:08,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:09:08,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:09:08,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c530a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08, skipping insertion in model container [2021-05-06 04:09:08,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:09:08,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:09:08,542 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/mannadiv_unwindbound1.c[573,586] [2021-05-06 04:09:08,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:09:08,562 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:09:08,587 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/mannadiv_unwindbound1.c[573,586] [2021-05-06 04:09:08,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:09:08,625 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:09:08,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08 WrapperNode [2021-05-06 04:09:08,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:09:08,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:09:08,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:09:08,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:09:08,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... [2021-05-06 04:09:08,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:09:08,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:09:08,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:09:08,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:09:08,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:09:08,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:09:08,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:09:08,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:09:08,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:09:08,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:09:08,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:09:08,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:09:08,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:09:08,963 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:09:08,963 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:09:08,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:09:08 BoogieIcfgContainer [2021-05-06 04:09:08,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:09:08,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:09:08,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:09:08,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:09:08,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:09:08" (1/3) ... [2021-05-06 04:09:08,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e05c6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:09:08, skipping insertion in model container [2021-05-06 04:09:08,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:09:08" (2/3) ... [2021-05-06 04:09:08,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e05c6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:09:08, skipping insertion in model container [2021-05-06 04:09:08,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:09:08" (3/3) ... [2021-05-06 04:09:08,968 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound1.c [2021-05-06 04:09:08,972 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:09:08,975 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:09:09,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:09:09,018 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:09:09,018 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:09:09,019 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:09:09,019 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:09:09,019 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:09:09,019 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:09:09,019 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:09:09,019 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:09:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:09:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 04:09:09,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:09,042 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:09,043 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-06 04:09:09,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:09,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59838203] [2021-05-06 04:09:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:09,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:09:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:09,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:09:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:09,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 04:09:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:09,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:09,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59838203] [2021-05-06 04:09:09,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59838203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:09:09,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:09:09,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:09:09,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897465341] [2021-05-06 04:09:09,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:09:09,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:09,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:09:09,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:09:09,319 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:09,416 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-06 04:09:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:09:09,418 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 04:09:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:09,423 INFO L225 Difference]: With dead ends: 54 [2021-05-06 04:09:09,423 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:09:09,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:09:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:09:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 04:09:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:09:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 04:09:09,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 04:09:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:09,448 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 04:09:09,448 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 04:09:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:09:09,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:09,450 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:09,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:09:09,450 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:09,451 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-06 04:09:09,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:09,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023807313] [2021-05-06 04:09:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:09,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:09,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29380800] [2021-05-06 04:09:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:09:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:09,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:09,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:09,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:09,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:09,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:09,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:09,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023807313] [2021-05-06 04:09:09,664 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:09,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29380800] [2021-05-06 04:09:09,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29380800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:09:09,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:09:09,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:09:09,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511973201] [2021-05-06 04:09:09,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:09:09,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:09,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:09:09,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:09:09,666 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:09,678 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:09:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:09:09,679 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 04:09:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:09,680 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:09:09,680 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:09:09,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:09:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:09:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:09:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:09:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 04:09:09,685 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 04:09:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:09,686 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 04:09:09,686 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:09:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 04:09:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:09:09,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:09,687 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:09,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:09:09,893 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:09,893 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-06 04:09:09,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:09,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655396381] [2021-05-06 04:09:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:09,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:09,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878722657] [2021-05-06 04:09:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:09,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 04:09:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:10,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:10,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:10,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:09:10,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:10,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655396381] [2021-05-06 04:09:10,167 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:10,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878722657] [2021-05-06 04:09:10,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878722657] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:09:10,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:09:10,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 04:09:10,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053146333] [2021-05-06 04:09:10,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:09:10,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:09:10,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:09:10,169 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:09:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:10,278 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-06 04:09:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:09:10,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 04:09:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:10,280 INFO L225 Difference]: With dead ends: 37 [2021-05-06 04:09:10,280 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:09:10,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:09:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:09:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-06 04:09:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:09:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 04:09:10,286 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 04:09:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:10,286 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 04:09:10,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:09:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 04:09:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 04:09:10,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:10,287 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:10,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:10,488 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-06 04:09:10,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:10,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634224289] [2021-05-06 04:09:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:10,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:10,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836748406] [2021-05-06 04:09:10,497 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 [2021-05-06 04:09:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:09:10,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:09:10,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:09:10,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:10,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:09:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:09:10,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:09:10,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634224289] [2021-05-06 04:09:10,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:09:10,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836748406] [2021-05-06 04:09:10,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836748406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:09:10,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:09:10,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:09:10,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618069028] [2021-05-06 04:09:10,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:09:10,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:09:10,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:09:10,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:09:10,713 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:09:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:09:10,808 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 04:09:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:09:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 04:09:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:09:10,810 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:09:10,810 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:09:10,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:09:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:09:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-06 04:09:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:09:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 04:09:10,814 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 04:09:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:09:10,814 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 04:09:10,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:09:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 04:09:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 04:09:10,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:09:10,815 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:09:11,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:11,029 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:09:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:09:11,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-06 04:09:11,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:09:11,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749333577] [2021-05-06 04:09:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:09:11,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:09:11,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828561878] [2021-05-06 04:09:11,037 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 [2021-05-06 04:09:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:09:11,086 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:09:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:09:11,099 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:09:11,147 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 04:09:11,147 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 04:09:11,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:09:11,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:09:11 BoogieIcfgContainer [2021-05-06 04:09:11,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:09:11,402 INFO L168 Benchmark]: Toolchain (without parser) took 2986.79 ms. Allocated memory is still 209.7 MB. Free memory was 173.0 MB in the beginning and 135.9 MB in the end (delta: 37.2 MB). Peak memory consumption was 38.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:11,402 INFO L168 Benchmark]: CDTParser took 9.82 ms. Allocated memory is still 209.7 MB. Free memory is still 189.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:09:11,403 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.65 ms. Allocated memory is still 209.7 MB. Free memory was 172.7 MB in the beginning and 192.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:11,403 INFO L168 Benchmark]: Boogie Preprocessor took 32.08 ms. Allocated memory is still 209.7 MB. Free memory was 191.4 MB in the beginning and 190.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:11,403 INFO L168 Benchmark]: RCFGBuilder took 303.30 ms. Allocated memory is still 209.7 MB. Free memory was 190.4 MB in the beginning and 175.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:11,403 INFO L168 Benchmark]: TraceAbstraction took 2436.99 ms. Allocated memory is still 209.7 MB. Free memory was 174.7 MB in the beginning and 135.9 MB in the end (delta: 38.8 MB). Peak memory consumption was 39.9 MB. Max. memory is 8.0 GB. [2021-05-06 04:09:11,403 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 9.82 ms. Allocated memory is still 209.7 MB. Free memory is still 189.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 207.65 ms. Allocated memory is still 209.7 MB. Free memory was 172.7 MB in the beginning and 192.0 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.08 ms. Allocated memory is still 209.7 MB. Free memory was 191.4 MB in the beginning and 190.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 303.30 ms. Allocated memory is still 209.7 MB. Free memory was 190.4 MB in the beginning and 175.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2436.99 ms. Allocated memory is still 209.7 MB. Free memory was 174.7 MB in the beginning and 135.9 MB in the end (delta: 38.8 MB). Peak memory consumption was 39.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: 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)=15, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=2, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=2, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=2, x2=1, y1=0, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=2, x2=1, y1=0, y2=0, y3=2] [L36] COND TRUE counter++<1 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=2, x2=1, y1=0, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=2, x2=1, y1=0, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=2, x2=1, y1=1, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=2, x2=1, y1=1, y2=0, y3=1] [L36] COND FALSE !(counter++<1) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L18] 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: 2359.9ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 8.4ms, AutomataDifference: 338.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 98 SDtfs, 45 SDslu, 255 SDs, 0 SdLazy, 147 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 161.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 215.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 63.1ms SsaConstructionTime, 148.2ms SatisfiabilityAnalysisTime, 590.7ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 239 SizeOfPredicates, 6 NumberOfNonLiveVariables, 392 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/18 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...