/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-c225d54 [2021-05-02 15:22:57,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:22:57,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:22:57,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:22:57,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:22:57,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:22:57,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:22:57,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:22:57,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:22:57,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:22:57,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:22:57,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:22:57,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:22:57,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:22:57,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:22:57,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:22:57,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:22:57,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:22:57,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:22:57,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:22:57,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:22:57,823 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:22:57,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:22:57,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:22:57,825 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:22:57,825 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:22:57,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:22:57,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:22:57,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:22:57,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:22:57,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:22:57,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:22:57,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:22:57,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:22:57,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:22:57,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:22:57,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:22:57,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:22:57,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:22:57,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:22:57,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:22:57,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:22:57,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:22:58,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:22:58,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:22:58,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:22:58,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:22:58,098 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:22:58,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c [2021-05-02 15:22:58,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005ccf54d/8f86fb22ab7c4140a16200f8c4d23714/FLAG5d796a199 [2021-05-02 15:22:58,541 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:22:58,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c [2021-05-02 15:22:58,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005ccf54d/8f86fb22ab7c4140a16200f8c4d23714/FLAG5d796a199 [2021-05-02 15:22:58,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005ccf54d/8f86fb22ab7c4140a16200f8c4d23714 [2021-05-02 15:22:58,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:22:58,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:22:58,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:22:58,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:22:58,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:22:58,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4711fd6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58, skipping insertion in model container [2021-05-02 15:22:58,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:22:58,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:22:58,646 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] [2021-05-02 15:22:58,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:22:58,658 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:22:58,665 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] [2021-05-02 15:22:58,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:22:58,675 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:22:58,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58 WrapperNode [2021-05-02 15:22:58,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:22:58,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:22:58,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:22:58,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:22:58,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... [2021-05-02 15:22:58,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:22:58,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:22:58,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:22:58,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:22:58,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:22:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:22:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:22:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:22:58,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:22:58,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:22:58,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:22:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:22:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:22:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:22:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:22:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:22:58,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:22:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:22:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:22:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:22:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:22:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:22:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:22:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:22:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:22:58,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:22:58,989 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:22:58,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:22:58 BoogieIcfgContainer [2021-05-02 15:22:58,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:22:58,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:22:58,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:22:58,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:22:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:22:58" (1/3) ... [2021-05-02 15:22:58,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d69d32b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:22:58, skipping insertion in model container [2021-05-02 15:22:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:22:58" (2/3) ... [2021-05-02 15:22:58,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d69d32b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:22:58, skipping insertion in model container [2021-05-02 15:22:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:22:58" (3/3) ... [2021-05-02 15:22:58,994 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound2.c [2021-05-02 15:22:58,997 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:22:58,999 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:22:59,025 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:22:59,048 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:22:59,048 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:22:59,048 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:22:59,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:22:59,048 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:22:59,049 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:22:59,049 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:22:59,049 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:22:59,061 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) [2021-05-02 15:22:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:22:59,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:59,065 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] [2021-05-02 15:22:59,065 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1276201559, now seen corresponding path program 1 times [2021-05-02 15:22:59,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:59,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806445029] [2021-05-02 15:22:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:22:59,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:22:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:22:59,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:22:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:22:59,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:22:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:22:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:22:59,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:59,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806445029] [2021-05-02 15:22:59,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806445029] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:22:59,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:22:59,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:22:59,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692156936] [2021-05-02 15:22:59,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:22:59,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:59,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:22:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:22:59,234 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) [2021-05-02 15:22:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:59,296 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-02 15:22:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:22:59,297 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 [2021-05-02 15:22:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:59,302 INFO L225 Difference]: With dead ends: 51 [2021-05-02 15:22:59,302 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 15:22:59,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:22:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 15:22:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 15:22:59,325 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) [2021-05-02 15:22:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 15:22:59,326 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-02 15:22:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:59,326 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 15:22:59,327 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) [2021-05-02 15:22:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 15:22:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:22:59,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:59,328 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] [2021-05-02 15:22:59,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:22:59,328 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:59,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:59,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1874219407, now seen corresponding path program 1 times [2021-05-02 15:22:59,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:59,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18202865] [2021-05-02 15:22:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:59,341 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:22:59,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759329433] [2021-05-02 15:22:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:22:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:22:59,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:59,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:59,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:59,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:59,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:22:59,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:59,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18202865] [2021-05-02 15:22:59,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:59,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759329433] [2021-05-02 15:22:59,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759329433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:59,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:59,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:22:59,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948074913] [2021-05-02 15:22:59,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:22:59,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:59,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:22:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:22:59,693 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) [2021-05-02 15:22:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:59,845 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 15:22:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:22:59,846 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 [2021-05-02 15:22:59,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:59,847 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:22:59,847 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 15:22:59,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:22:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 15:22:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 15:22:59,853 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) [2021-05-02 15:22:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 15:22:59,853 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-02 15:22:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:59,854 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 15:22:59,855 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) [2021-05-02 15:22:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 15:22:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:22:59,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:59,855 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] [2021-05-02 15:23:00,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:23:00,070 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash 156588053, now seen corresponding path program 1 times [2021-05-02 15:23:00,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:00,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63239761] [2021-05-02 15:23:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:00,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:00,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104664364] [2021-05-02 15:23:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:00,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:23:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:00,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:23:00,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63239761] [2021-05-02 15:23:00,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104664364] [2021-05-02 15:23:00,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104664364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:00,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:00,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:23:00,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662527524] [2021-05-02 15:23:00,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:23:00,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:00,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:23:00,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:00,354 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:23:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:00,462 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 15:23:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:23:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 15:23:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:00,463 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:23:00,463 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:23:00,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:23:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:23:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:23:00,468 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) [2021-05-02 15:23:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 15:23:00,469 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-02 15:23:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:00,469 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 15:23:00,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:23:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 15:23:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:23:00,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:00,470 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] [2021-05-02 15:23:00,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:00,677 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1865789967, now seen corresponding path program 2 times [2021-05-02 15:23:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:00,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967828559] [2021-05-02 15:23:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:00,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:00,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265733023] [2021-05-02 15:23:00,686 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 [2021-05-02 15:23:00,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:00,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:00,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 15:23:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:00,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:00,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 15:23:01,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:01,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967828559] [2021-05-02 15:23:01,002 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:01,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265733023] [2021-05-02 15:23:01,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265733023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:01,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:01,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:23:01,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805907958] [2021-05-02 15:23:01,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:23:01,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:01,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:23:01,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:23:01,003 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) [2021-05-02 15:23:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:01,058 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 15:23:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:23:01,059 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 [2021-05-02 15:23:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:01,059 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:23:01,059 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:23:01,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:23:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:23:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:23:01,060 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) [2021-05-02 15:23:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:23:01,060 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-05-02 15:23:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:01,060 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:23:01,060 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) [2021-05-02 15:23:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:23:01,060 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:23:01,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:01,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:23:01,453 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2021-05-02 15:23:01,639 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2021-05-02 15:23:01,711 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:23:01,711 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:23:01,711 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:23:01,711 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:01,712 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|)) [2021-05-02 15:23:01,719 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:01,719 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:01,719 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:23:01,719 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:23:01,719 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:01,720 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 15:23:01,720 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:23:01,720 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:23:01,720 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:23:01,720 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)))) [2021-05-02 15:23:01,720 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)))) [2021-05-02 15:23:01,720 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 23 47) the Hoare annotation is: true [2021-05-02 15:23:01,720 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~z~0) (<= main_~z~0 2)) [2021-05-02 15:23:01,720 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 15:23:01,720 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-02 15:23:01,720 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 47) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point L45(line 45) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 47) no Hoare annotation was computed. [2021-05-02 15:23:01,721 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)))) [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 44) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:23:01,721 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:23:01,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:23:01 BoogieIcfgContainer [2021-05-02 15:23:01,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:23:01,745 INFO L168 Benchmark]: Toolchain (without parser) took 3189.01 ms. Allocated memory was 197.1 MB in the beginning and 245.4 MB in the end (delta: 48.2 MB). Free memory was 160.4 MB in the beginning and 195.2 MB in the end (delta: -34.8 MB). Peak memory consumption was 94.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:01,745 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 197.1 MB. Free memory is still 177.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:23:01,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 119.30 ms. Allocated memory is still 197.1 MB. Free memory was 160.2 MB in the beginning and 150.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:01,745 INFO L168 Benchmark]: Boogie Preprocessor took 55.27 ms. Allocated memory is still 197.1 MB. Free memory was 150.5 MB in the beginning and 179.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:01,745 INFO L168 Benchmark]: RCFGBuilder took 257.27 ms. Allocated memory is still 197.1 MB. Free memory was 179.4 MB in the beginning and 164.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:01,745 INFO L168 Benchmark]: TraceAbstraction took 2753.72 ms. Allocated memory was 197.1 MB in the beginning and 245.4 MB in the end (delta: 48.2 MB). Free memory was 163.6 MB in the beginning and 195.2 MB in the end (delta: -31.5 MB). Peak memory consumption was 98.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:01,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 197.1 MB. Free memory is still 177.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 119.30 ms. Allocated memory is still 197.1 MB. Free memory was 160.2 MB in the beginning and 150.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.27 ms. Allocated memory is still 197.1 MB. Free memory was 150.5 MB in the beginning and 179.4 MB in the end (delta: -28.9 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 257.27 ms. Allocated memory is still 197.1 MB. Free memory was 179.4 MB in the beginning and 164.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2753.72 ms. Allocated memory was 197.1 MB in the beginning and 245.4 MB in the end (delta: 48.2 MB). Free memory was 163.6 MB in the beginning and 195.2 MB in the end (delta: -31.5 MB). Peak memory consumption was 98.6 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: 2223.0ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 7.7ms, AutomataDifference: 400.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 441.8ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 89 SDtfs, 47 SDslu, 280 SDs, 0 SdLazy, 155 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 228.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 292.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 27 NumberOfFragments, 167 HoareAnnotationTreeSize, 20 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 55.6ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 338 FormulaSimplificationTreeSizeReductionInter, 379.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 46.7ms SsaConstructionTime, 122.7ms SatisfiabilityAnalysisTime, 770.6ms InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 355 SizeOfPredicates, 6 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 27/35 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...