/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/geo1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:44:33,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:44:33,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:44:33,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:44:33,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:44:33,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:44:33,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:44:33,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:44:33,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:44:33,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:44:33,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:44:33,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:44:33,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:44:33,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:44:33,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:44:33,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:44:33,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:44:33,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:44:33,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:44:33,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:44:33,637 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 02:44:33,675 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:44:33,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:44:33,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:44:33,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:44:33,676 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:44:33,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:44:33,676 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:44:33,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:44:33,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:44:33,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:44:33,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:44:33,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:44:33,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:44:33,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:44:33,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:44:33,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:44:33,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:44:33,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:44:33,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:44:33,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:44:33,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:44:33,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:44:34,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:44:34,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:44:34,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:44:34,011 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:44:34,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound20.c [2021-05-06 02:44:34,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70892967c/5683e0a2daa940f18235d34d553c95ef/FLAG89189734c [2021-05-06 02:44:34,398 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:44:34,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound20.c [2021-05-06 02:44:34,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70892967c/5683e0a2daa940f18235d34d553c95ef/FLAG89189734c [2021-05-06 02:44:34,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70892967c/5683e0a2daa940f18235d34d553c95ef [2021-05-06 02:44:34,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:44:34,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:44:34,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:34,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:44:34,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:44:34,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a9beb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34, skipping insertion in model container [2021-05-06 02:44:34,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:44:34,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:44:34,531 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/geo1-ll_unwindbound20.c[546,559] [2021-05-06 02:44:34,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:34,547 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:44:34,556 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/geo1-ll_unwindbound20.c[546,559] [2021-05-06 02:44:34,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:34,578 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:44:34,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34 WrapperNode [2021-05-06 02:44:34,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:34,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:44:34,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:44:34,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:44:34,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (1/1) ... [2021-05-06 02:44:34,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:44:34,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:44:34,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:44:34,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:44:34,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (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 02:44:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:44:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:44:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:44:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:44:34,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:44:34,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:44:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:44:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:44:34,727 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:44:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:44:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:44:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:44:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:44:34,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:44:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:44:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:44:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:44:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:44:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:44:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:44:34,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:44:34,959 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:44:34,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:34 BoogieIcfgContainer [2021-05-06 02:44:34,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:44:34,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:44:34,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:44:34,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:44:34,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:44:34" (1/3) ... [2021-05-06 02:44:34,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc5e8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:34, skipping insertion in model container [2021-05-06 02:44:34,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:34" (2/3) ... [2021-05-06 02:44:34,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc5e8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:34, skipping insertion in model container [2021-05-06 02:44:34,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:34" (3/3) ... [2021-05-06 02:44:34,978 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c [2021-05-06 02:44:34,982 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:44:34,984 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:44:34,994 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:44:35,016 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:44:35,016 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:44:35,016 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:44:35,016 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:44:35,016 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:44:35,016 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:44:35,016 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:44:35,016 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:44:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 02:44:35,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:44:35,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:35,034 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 02:44:35,035 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:35,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:35,038 INFO L82 PathProgramCache]: Analyzing trace with hash 730417173, now seen corresponding path program 1 times [2021-05-06 02:44:35,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:35,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181642062] [2021-05-06 02:44:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:35,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:44:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:35,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:44:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:35,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:44:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:35,283 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 02:44:35,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:35,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181642062] [2021-05-06 02:44:35,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181642062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:35,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:35,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:44:35,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683211963] [2021-05-06 02:44:35,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:44:35,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:44:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:35,298 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 02:44:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:35,402 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2021-05-06 02:44:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:44:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 23 [2021-05-06 02:44:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:35,408 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:44:35,408 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 02:44:35,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 02:44:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 02:44:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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 02:44:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 02:44:35,433 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-06 02:44:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:35,433 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 02:44:35,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 02:44:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 02:44:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:44:35,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:35,435 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 02:44:35,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:44:35,435 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:35,435 INFO L82 PathProgramCache]: Analyzing trace with hash -942473515, now seen corresponding path program 1 times [2021-05-06 02:44:35,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:35,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608373475] [2021-05-06 02:44:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:35,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:35,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377083692] [2021-05-06 02:44:35,448 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 02:44:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:44:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:35,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:35,665 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 02:44:35,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:35,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608373475] [2021-05-06 02:44:35,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:35,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377083692] [2021-05-06 02:44:35,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377083692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:35,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:35,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:44:35,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863794007] [2021-05-06 02:44:35,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:44:35,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:44:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:44:35,667 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:44:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:35,705 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 02:44:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:44:35,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:44:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:35,706 INFO L225 Difference]: With dead ends: 36 [2021-05-06 02:44:35,706 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 02:44:35,707 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:44:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 02:44:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 02:44:35,712 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 02:44:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 02:44:35,713 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 02:44:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:35,714 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 02:44:35,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:44:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 02:44:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 02:44:35,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:35,715 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:35,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:44:35,937 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash 769172850, now seen corresponding path program 1 times [2021-05-06 02:44:35,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:35,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349420903] [2021-05-06 02:44:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:35,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:35,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734682286] [2021-05-06 02:44:35,948 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 02:44:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:44:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:36,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,129 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 02:44:36,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:36,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349420903] [2021-05-06 02:44:36,129 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:36,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734682286] [2021-05-06 02:44:36,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734682286] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:36,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:36,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:44:36,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105046815] [2021-05-06 02:44:36,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:44:36,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:36,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:44:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:36,131 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 02:44:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:36,142 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-05-06 02:44:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:44:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 24 [2021-05-06 02:44:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:36,145 INFO L225 Difference]: With dead ends: 40 [2021-05-06 02:44:36,145 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:44:36,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:44:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:44:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 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 02:44:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 02:44:36,150 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2021-05-06 02:44:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:36,150 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 02:44:36,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 02:44:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 02:44:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:44:36,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:36,151 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, 1] [2021-05-06 02:44:36,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:36,368 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash 431121724, now seen corresponding path program 1 times [2021-05-06 02:44:36,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:36,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142532304] [2021-05-06 02:44:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:36,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:36,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880241346] [2021-05-06 02:44:36,378 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 02:44:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:36,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:44:36,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:36,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:36,555 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 02:44:36,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:36,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142532304] [2021-05-06 02:44:36,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:36,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880241346] [2021-05-06 02:44:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880241346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:36,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:36,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:44:36,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989811720] [2021-05-06 02:44:36,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:44:36,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:44:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:44:36,557 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 02:44:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:36,702 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 02:44:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:44:36,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 30 [2021-05-06 02:44:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:36,703 INFO L225 Difference]: With dead ends: 32 [2021-05-06 02:44:36,703 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:44:36,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:44:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:44:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:44:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:44:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:44:36,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-05-06 02:44:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:36,705 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:44:36,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 02:44:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:44:36,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:44:36,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:36,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:44:37,039 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-06 02:44:37,039 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-06 02:44:37,040 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-06 02:44:37,040 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:44:37,040 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:44:37,040 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:44:37,040 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:44:37,040 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-06 02:44:37,040 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:44:37,040 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:44:37,040 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-06 02:44:37,040 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-06 02:44:37,040 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-06 02:44:37,041 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-06 02:44:37,041 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 45) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 main_~y~0))) [2021-05-06 02:44:37,041 INFO L198 CegarLoopUtils]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2021-05-06 02:44:37,041 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-06 02:44:37,041 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 51) no Hoare annotation was computed. [2021-05-06 02:44:37,041 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 51) no Hoare annotation was computed. [2021-05-06 02:44:37,041 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 main_~y~0))) [2021-05-06 02:44:37,041 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2021-05-06 02:44:37,041 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 51) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:44:37,041 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:44:37,041 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:44:37,042 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (exists ((v_main_~x~0_11 Int) (main_~z~0 Int)) (let ((.cse0 (* v_main_~x~0_11 main_~z~0))) (and (= .cse0 (+ v_main_~x~0_11 main_~x~0)) (= (+ .cse0 1) (+ v_main_~x~0_11 main_~y~0)))))) [2021-05-06 02:44:37,042 INFO L198 CegarLoopUtils]: For program point L49-1(line 49) no Hoare annotation was computed. [2021-05-06 02:44:37,042 INFO L198 CegarLoopUtils]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2021-05-06 02:44:37,042 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-06 02:44:37,042 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-06 02:44:37,042 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-06 02:44:37,042 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-06 02:44:37,042 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-06 02:44:37,042 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-06 02:44:37,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:44:37 BoogieIcfgContainer [2021-05-06 02:44:37,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:44:37,052 INFO L168 Benchmark]: Toolchain (without parser) took 2630.27 ms. Allocated memory was 203.4 MB in the beginning and 252.7 MB in the end (delta: 49.3 MB). Free memory was 169.6 MB in the beginning and 197.5 MB in the end (delta: -27.8 MB). Peak memory consumption was 21.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:37,053 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 203.4 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:44:37,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.51 ms. Allocated memory is still 203.4 MB. Free memory was 169.4 MB in the beginning and 159.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:37,053 INFO L168 Benchmark]: Boogie Preprocessor took 61.42 ms. Allocated memory is still 203.4 MB. Free memory was 159.7 MB in the beginning and 186.7 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:37,053 INFO L168 Benchmark]: RCFGBuilder took 317.46 ms. Allocated memory is still 203.4 MB. Free memory was 186.7 MB in the beginning and 172.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:37,053 INFO L168 Benchmark]: TraceAbstraction took 2090.57 ms. Allocated memory was 203.4 MB in the beginning and 252.7 MB in the end (delta: 49.3 MB). Free memory was 171.6 MB in the beginning and 197.5 MB in the end (delta: -25.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:37,054 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 203.4 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 155.51 ms. Allocated memory is still 203.4 MB. Free memory was 169.4 MB in the beginning and 159.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.42 ms. Allocated memory is still 203.4 MB. Free memory was 159.7 MB in the beginning and 186.7 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 317.46 ms. Allocated memory is still 203.4 MB. Free memory was 186.7 MB in the beginning and 172.1 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2090.57 ms. Allocated memory was 203.4 MB in the beginning and 252.7 MB in the end (delta: 49.3 MB). Free memory was 171.6 MB in the beginning and 197.5 MB in the end (delta: -25.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1902.7ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 9.6ms, AutomataDifference: 322.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 121.8ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 100 SDtfs, 28 SDslu, 200 SDs, 0 SdLazy, 70 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 203.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 146.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 18 PreInvPairs, 24 NumberOfFragments, 115 HoareAnnotationTreeSize, 18 FomulaSimplifications, 37 FormulaSimplificationTreeSizeReduction, 32.5ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 184 FormulaSimplificationTreeSizeReductionInter, 82.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 65.8ms SsaConstructionTime, 95.4ms SatisfiabilityAnalysisTime, 459.7ms InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 96 ConstructedInterpolants, 1 QuantifiedInterpolants, 230 SizeOfPredicates, 5 NumberOfNonLiveVariables, 395 ConjunctsInSsa, 22 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || x * z + 1 == x + y RESULT: Ultimate proved your program to be correct! Received shutdown request...