/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/geo2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:52:41,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:52:41,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:52:41,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:52:41,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:52:41,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:52:41,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:52:41,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:52:41,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:52:41,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:52:41,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:52:41,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:52:41,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:52:41,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:52:41,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:52:41,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:52:41,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:52:41,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:52:41,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:52:41,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:52:41,917 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 02:52:41,958 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:52:41,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:52:41,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:52:41,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:52:41,961 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:52:41,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:52:41,962 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:52:41,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:52:41,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:52:41,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:52:41,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:52:41,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:52:41,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:52:41,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:52:41,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:52:41,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:52:41,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:52:41,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:52:41,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:52:41,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:52:41,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:52:41,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:52:41,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:52:41,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:52:41,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:52:41,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:52:41,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:52:41,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:52:41,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:52:42,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:52:42,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:52:42,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:52:42,317 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:52:42,317 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:52:42,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c [2021-05-06 02:52:42,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6742de6d/f17d2315bdcc48098bea6469b037bdcc/FLAG7fa5e92b9 [2021-05-06 02:52:42,846 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:52:42,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c [2021-05-06 02:52:42,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6742de6d/f17d2315bdcc48098bea6469b037bdcc/FLAG7fa5e92b9 [2021-05-06 02:52:42,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6742de6d/f17d2315bdcc48098bea6469b037bdcc [2021-05-06 02:52:42,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:52:42,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:52:42,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:52:42,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:52:42,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:52:42,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:52:42" (1/1) ... [2021-05-06 02:52:42,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d25c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:42, skipping insertion in model container [2021-05-06 02:52:42,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:52:42" (1/1) ... [2021-05-06 02:52:42,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:52:42,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:52:43,052 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/geo2-ll_valuebound2.c[525,538] [2021-05-06 02:52:43,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:52:43,077 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:52:43,089 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/geo2-ll_valuebound2.c[525,538] [2021-05-06 02:52:43,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:52:43,120 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:52:43,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43 WrapperNode [2021-05-06 02:52:43,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:52:43,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:52:43,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:52:43,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:52:43,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (1/1) ... [2021-05-06 02:52:43,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (1/1) ... [2021-05-06 02:52:43,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (1/1) ... [2021-05-06 02:52:43,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (1/1) ... [2021-05-06 02:52:43,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (1/1) ... [2021-05-06 02:52:43,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (1/1) ... [2021-05-06 02:52:43,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (1/1) ... [2021-05-06 02:52:43,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:52:43,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:52:43,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:52:43,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:52:43,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (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 02:52:43,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:52:43,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:52:43,275 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:52:43,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:52:43,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:52:43,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:52:43,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:52:43,276 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:52:43,276 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:52:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:52:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:52:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:52:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:52:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:52:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:52:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:52:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:52:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:52:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:52:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:52:43,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:52:43,586 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:52:43,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:52:43 BoogieIcfgContainer [2021-05-06 02:52:43,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:52:43,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:52:43,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:52:43,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:52:43,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:52:42" (1/3) ... [2021-05-06 02:52:43,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd5739a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:52:43, skipping insertion in model container [2021-05-06 02:52:43,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:52:43" (2/3) ... [2021-05-06 02:52:43,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd5739a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:52:43, skipping insertion in model container [2021-05-06 02:52:43,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:52:43" (3/3) ... [2021-05-06 02:52:43,609 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound2.c [2021-05-06 02:52:43,614 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:52:43,618 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:52:43,633 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:52:43,653 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:52:43,653 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:52:43,653 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:52:43,653 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:52:43,654 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:52:43,654 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:52:43,654 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:52:43,654 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:52:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:52:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:52:43,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:52:43,672 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 02:52:43,672 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:52:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:52:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1276201559, now seen corresponding path program 1 times [2021-05-06 02:52:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:52:43,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388212308] [2021-05-06 02:52:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:52:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:52:43,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:52:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:52:43,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:52:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:52:43,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:52:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:52:43,981 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 02:52:43,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:52:43,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388212308] [2021-05-06 02:52:43,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388212308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:52:43,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:52:43,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:52:43,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14171523] [2021-05-06 02:52:43,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:52:43,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:52:43,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:52:43,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:52:44,002 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 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 02:52:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:52:44,115 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-06 02:52:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:52:44,117 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 02:52:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:52:44,124 INFO L225 Difference]: With dead ends: 51 [2021-05-06 02:52:44,124 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 02:52:44,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:52:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 02:52:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 02:52:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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 02:52:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 02:52:44,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-06 02:52:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:52:44,170 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 02:52:44,170 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 02:52:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 02:52:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:52:44,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:52:44,173 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 02:52:44,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:52:44,173 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:52:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:52:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1874219407, now seen corresponding path program 1 times [2021-05-06 02:52:44,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:52:44,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967385407] [2021-05-06 02:52:44,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:52:44,213 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:52:44,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038667218] [2021-05-06 02:52:44,213 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 02:52:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:52:44,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:52:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:52:44,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:44,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:44,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:44,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:52:44,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:52:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967385407] [2021-05-06 02:52:44,566 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:52:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038667218] [2021-05-06 02:52:44,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038667218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:52:44,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:52:44,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:52:44,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210870998] [2021-05-06 02:52:44,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:52:44,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:52:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:52:44,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:52:44,569 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:52:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:52:44,662 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 02:52:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:52:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:52:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:52:44,664 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:52:44,664 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:52:44,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:52:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:52:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 02:52:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:52:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 02:52:44,674 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-06 02:52:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:52:44,675 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 02:52:44,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:52:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 02:52:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:52:44,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:52:44,676 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:52:44,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:52:44,889 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:52:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:52:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash 156588053, now seen corresponding path program 1 times [2021-05-06 02:52:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:52:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381712957] [2021-05-06 02:52:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:52:44,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:52:44,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318293446] [2021-05-06 02:52:44,902 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 02:52:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:52:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:52:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:52:45,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:52:45,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:52:45,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381712957] [2021-05-06 02:52:45,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:52:45,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318293446] [2021-05-06 02:52:45,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318293446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:52:45,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:52:45,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:52:45,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845101703] [2021-05-06 02:52:45,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:52:45,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:52:45,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:52:45,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:52:45,270 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 02:52:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:52:45,410 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 02:52:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:52:45,411 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 02:52:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:52:45,413 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:52:45,413 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:52:45,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:52:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:52:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 02:52:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:52:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-06 02:52:45,431 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-06 02:52:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:52:45,431 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-06 02:52:45,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 02:52:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-06 02:52:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:52:45,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:52:45,434 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:52:45,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:52:45,649 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:52:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:52:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1865789967, now seen corresponding path program 2 times [2021-05-06 02:52:45,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:52:45,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397282020] [2021-05-06 02:52:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:52:45,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:52:45,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646640163] [2021-05-06 02:52:45,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 02:52:45,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:52:45,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:52:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:52:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:52:45,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:52:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:52:45,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:52:45,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397282020] [2021-05-06 02:52:45,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:52:45,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646640163] [2021-05-06 02:52:45,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646640163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:52:45,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:52:45,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 02:52:45,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134892825] [2021-05-06 02:52:45,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:52:45,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:52:45,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:52:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:52:45,923 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:52:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:52:45,961 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-06 02:52:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:52:45,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 02:52:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:52:45,963 INFO L225 Difference]: With dead ends: 38 [2021-05-06 02:52:45,963 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:52:45,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:52:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:52:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:52:45,964 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 02:52:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:52:45,964 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-05-06 02:52:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:52:45,965 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:52:45,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:52:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:52:45,968 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:52:46,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:52:46,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:52:46,556 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2021-05-06 02:52:46,628 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-06 02:52:46,628 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-06 02:52:46,629 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-06 02:52:46,629 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:52:46,629 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)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:52:46,629 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:52:46,629 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:52:46,629 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:52:46,629 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:52:46,630 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:52:46,630 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-06 02:52:46,630 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-06 02:52:46,630 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-06 02:52:46,630 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-06 02:52:46,630 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 44) the Hoare annotation is: (let ((.cse0 (<= 0 main_~k~0)) (.cse1 (<= 0 main_~z~0)) (.cse2 (<= main_~z~0 2)) (.cse3 (<= main_~k~0 2))) (or (and (<= 1 main_~c~0) .cse0 (= main_~y~0 1) .cse1 .cse2 .cse3 (= main_~x~0 1)) (and (= main_~x~0 (+ main_~z~0 1)) .cse0 (<= 2 main_~c~0) .cse1 .cse2 .cse3 (= main_~z~0 main_~y~0)))) [2021-05-06 02:52:46,630 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 44) the Hoare annotation is: (let ((.cse0 (<= 0 main_~z~0)) (.cse1 (<= main_~z~0 2))) (or (and (= main_~x~0 (+ main_~z~0 1)) .cse0 .cse1 (= main_~z~0 main_~y~0)) (and (= main_~y~0 1) .cse0 .cse1 (= main_~x~0 1)))) [2021-05-06 02:52:46,631 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 23 47) the Hoare annotation is: true [2021-05-06 02:52:46,631 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~z~0) (<= main_~z~0 2)) [2021-05-06 02:52:46,631 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-06 02:52:46,631 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-06 02:52:46,631 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-06 02:52:46,631 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 47) no Hoare annotation was computed. [2021-05-06 02:52:46,631 INFO L198 CegarLoopUtils]: For program point L45(line 45) no Hoare annotation was computed. [2021-05-06 02:52:46,631 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 47) no Hoare annotation was computed. [2021-05-06 02:52:46,632 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 0 main_~k~0)) (.cse1 (<= 0 main_~z~0)) (.cse2 (<= main_~z~0 2)) (.cse3 (<= main_~k~0 2))) (or (and (<= 1 main_~c~0) .cse0 (= main_~y~0 1) .cse1 .cse2 .cse3 (= main_~x~0 1)) (and (= main_~x~0 (+ main_~z~0 1)) .cse0 (<= 2 main_~c~0) .cse1 .cse2 .cse3 (= main_~z~0 main_~y~0)))) [2021-05-06 02:52:46,632 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 44) no Hoare annotation was computed. [2021-05-06 02:52:46,632 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-06 02:52:46,632 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-06 02:52:46,632 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-06 02:52:46,632 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-06 02:52:46,632 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-06 02:52:46,632 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-06 02:52:46,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:52:46 BoogieIcfgContainer [2021-05-06 02:52:46,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:52:46,646 INFO L168 Benchmark]: Toolchain (without parser) took 3760.49 ms. Allocated memory was 206.6 MB in the beginning and 260.0 MB in the end (delta: 53.5 MB). Free memory was 170.6 MB in the beginning and 211.7 MB in the end (delta: -41.2 MB). Peak memory consumption was 100.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:52:46,646 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 206.6 MB. Free memory is still 187.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:52:46,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.07 ms. Allocated memory is still 206.6 MB. Free memory was 170.4 MB in the beginning and 160.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:52:46,647 INFO L168 Benchmark]: Boogie Preprocessor took 73.90 ms. Allocated memory is still 206.6 MB. Free memory was 160.7 MB in the beginning and 189.7 MB in the end (delta: -29.0 MB). Peak memory consumption was 2.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:52:46,647 INFO L168 Benchmark]: RCFGBuilder took 389.98 ms. Allocated memory is still 206.6 MB. Free memory was 189.7 MB in the beginning and 174.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:52:46,647 INFO L168 Benchmark]: TraceAbstraction took 3041.75 ms. Allocated memory was 206.6 MB in the beginning and 260.0 MB in the end (delta: 53.5 MB). Free memory was 174.0 MB in the beginning and 211.7 MB in the end (delta: -37.8 MB). Peak memory consumption was 104.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:52:46,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 206.6 MB. Free memory is still 187.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.07 ms. Allocated memory is still 206.6 MB. Free memory was 170.4 MB in the beginning and 160.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.90 ms. Allocated memory is still 206.6 MB. Free memory was 160.7 MB in the beginning and 189.7 MB in the end (delta: -29.0 MB). Peak memory consumption was 2.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 389.98 ms. Allocated memory is still 206.6 MB. Free memory was 189.7 MB in the beginning and 174.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3041.75 ms. Allocated memory was 206.6 MB in the beginning and 260.0 MB in the end (delta: 53.5 MB). Free memory was 174.0 MB in the beginning and 211.7 MB in the end (delta: -37.8 MB). Peak memory consumption was 104.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2535.6ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 12.5ms, AutomataDifference: 421.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 441.2ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 87 SDtfs, 54 SDslu, 271 SDs, 0 SdLazy, 174 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 191.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 325.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 27 NumberOfFragments, 167 HoareAnnotationTreeSize, 20 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 87.8ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 338 FormulaSimplificationTreeSizeReductionInter, 345.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 51.6ms SsaConstructionTime, 136.6ms SatisfiabilityAnalysisTime, 925.0ms InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 363 SizeOfPredicates, 7 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 26/35 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: ((((((1 <= c && 0 <= k) && y == 1) && 0 <= z) && z <= 2) && k <= 2) && x == 1) || ((((((x == z + 1 && 0 <= k) && 2 <= c) && 0 <= z) && z <= 2) && k <= 2) && z == y) RESULT: Ultimate proved your program to be correct! Received shutdown request...