/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:23:04,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:23:04,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:23:04,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:23:04,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:23:04,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:23:04,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:23:04,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:23:04,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:23:04,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:23:04,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:23:04,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:23:04,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:23:04,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:23:04,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:23:04,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:23:04,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:23:04,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:23:04,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:23:04,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:23:04,551 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 15:23:04,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:23:04,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:23:04,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:23:04,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:23:04,600 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:23:04,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:23:04,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:23:04,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:23:04,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:23:04,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:23:04,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:23:04,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:23:04,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:23:04,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:23:04,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:23:04,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:23:04,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:23:04,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:23:04,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:23:04,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:23:04,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:23:04,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:23:04,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:23:04,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:23:04,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:23:04,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:23:04,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:23:04,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:23:04,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:23:05,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:23:05,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:23:05,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:23:05,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:23:05,091 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:23:05,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound20.c [2021-05-02 15:23:05,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f85cf4bc/366544a135874115969c5e7d1079d1f1/FLAG69e499746 [2021-05-02 15:23:05,772 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:23:05,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound20.c [2021-05-02 15:23:05,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f85cf4bc/366544a135874115969c5e7d1079d1f1/FLAG69e499746 [2021-05-02 15:23:06,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f85cf4bc/366544a135874115969c5e7d1079d1f1 [2021-05-02 15:23:06,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:23:06,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:23:06,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:06,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:23:06,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:23:06,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cdce410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06, skipping insertion in model container [2021-05-02 15:23:06,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:23:06,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:23:06,407 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_valuebound20.c[525,538] [2021-05-02 15:23:06,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:06,444 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:23:06,489 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_valuebound20.c[525,538] [2021-05-02 15:23:06,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:06,502 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:23:06,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06 WrapperNode [2021-05-02 15:23:06,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:06,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:23:06,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:23:06,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:23:06,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (1/1) ... [2021-05-02 15:23:06,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:23:06,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:23:06,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:23:06,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:23:06,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (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 15:23:06,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:23:06,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:23:06,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:23:06,564 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:23:06,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:23:06,564 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:23:06,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:23:06,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:23:06,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:23:06,719 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:23:06,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:06 BoogieIcfgContainer [2021-05-02 15:23:06,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:23:06,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:23:06,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:23:06,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:23:06,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:23:06" (1/3) ... [2021-05-02 15:23:06,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f40be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:06, skipping insertion in model container [2021-05-02 15:23:06,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:06" (2/3) ... [2021-05-02 15:23:06,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f40be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:06, skipping insertion in model container [2021-05-02 15:23:06,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:06" (3/3) ... [2021-05-02 15:23:06,726 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound20.c [2021-05-02 15:23:06,730 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:23:06,732 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:23:06,745 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:23:06,762 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:23:06,762 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:23:06,762 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:23:06,762 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:23:06,762 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:23:06,762 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:23:06,762 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:23:06,762 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:23:06,774 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 15:23:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:23:06,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:06,779 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 15:23:06,779 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1276201559, now seen corresponding path program 1 times [2021-05-02 15:23:06,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:06,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334785469] [2021-05-02 15:23:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:06,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:23:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:06,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:23:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:06,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:23:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:06,960 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 15:23:06,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:06,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334785469] [2021-05-02 15:23:06,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334785469] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:06,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:06,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:23:06,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855485808] [2021-05-02 15:23:06,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:23:06,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:06,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:23:06,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:23:06,976 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 15:23:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:07,040 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-02 15:23:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:23:07,042 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 15:23:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:07,046 INFO L225 Difference]: With dead ends: 51 [2021-05-02 15:23:07,046 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 15:23:07,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:23:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 15:23:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 15:23:07,072 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 15:23:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 15:23:07,074 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-02 15:23:07,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:07,074 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 15:23:07,074 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 15:23:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 15:23:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:23:07,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:07,075 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 15:23:07,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:23:07,076 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1874219407, now seen corresponding path program 1 times [2021-05-02 15:23:07,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:07,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956520324] [2021-05-02 15:23:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:07,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:07,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563444837] [2021-05-02 15:23:07,091 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 15:23:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:23:07,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:07,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,303 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 15:23:07,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:07,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956520324] [2021-05-02 15:23:07,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563444837] [2021-05-02 15:23:07,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563444837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:07,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:07,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:23:07,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793042291] [2021-05-02 15:23:07,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:23:07,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:07,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:23:07,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:23:07,306 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 15:23:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:07,383 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 15:23:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:07,384 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 15:23:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:07,385 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:23:07,385 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 15:23:07,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:23:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 15:23:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 15:23:07,391 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 15:23:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 15:23:07,392 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-02 15:23:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:07,393 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 15:23:07,393 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 15:23:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 15:23:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:23:07,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:07,394 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 15:23:07,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:23:07,611 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash 156588053, now seen corresponding path program 1 times [2021-05-02 15:23:07,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:07,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954651303] [2021-05-02 15:23:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:07,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:07,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108704415] [2021-05-02 15:23:07,649 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 15:23:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:23:07,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:07,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:07,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:08,004 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 15:23:08,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:08,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954651303] [2021-05-02 15:23:08,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:08,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108704415] [2021-05-02 15:23:08,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108704415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:08,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:08,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:23:08,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380194394] [2021-05-02 15:23:08,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:23:08,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:23:08,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:08,006 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 15:23:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:08,093 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 15:23:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:23:08,094 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 15:23:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:08,095 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:23:08,095 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:23:08,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:23:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:23:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:23:08,099 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 15:23:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 15:23:08,100 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-02 15:23:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:08,100 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 15:23:08,100 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 15:23:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 15:23:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:23:08,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:08,101 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 15:23:08,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:08,317 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1865789967, now seen corresponding path program 2 times [2021-05-02 15:23:08,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:08,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843071136] [2021-05-02 15:23:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:08,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:08,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638851152] [2021-05-02 15:23:08,326 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 15:23:08,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:08,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:08,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 15:23:08,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:08,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:08,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:08,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:08,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,664 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:23:10,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:23:10,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:10,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843071136] [2021-05-02 15:23:10,939 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:10,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638851152] [2021-05-02 15:23:10,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638851152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:10,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:10,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:23:10,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236094964] [2021-05-02 15:23:10,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:23:10,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:23:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:23:10,940 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:23:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:12,956 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-02 15:23:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:23:12,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 15:23:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:12,966 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:23:12,966 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:23:12,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2220.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:23:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:23:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 15:23:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:23:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-02 15:23:12,973 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2021-05-02 15:23:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:12,974 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-02 15:23:12,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:23:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-02 15:23:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 15:23:12,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:12,975 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:13,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:13,197 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1145718933, now seen corresponding path program 3 times [2021-05-02 15:23:13,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:13,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843742078] [2021-05-02 15:23:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:13,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:13,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065475384] [2021-05-02 15:23:13,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:13,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:23:13,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:13,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:23:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:15,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:15,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:15,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 15:23:15,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843742078] [2021-05-02 15:23:15,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:15,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065475384] [2021-05-02 15:23:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065475384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:15,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:15,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:23:15,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527485826] [2021-05-02 15:23:15,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:23:15,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:15,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:23:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=42, Unknown=1, NotChecked=0, Total=56 [2021-05-02 15:23:15,503 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:23:32,954 WARN L205 SmtUtils]: Spent 13.27 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-02 15:23:34,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:34,980 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-02 15:23:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:23:34,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2021-05-02 15:23:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:34,981 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:23:34,982 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:23:34,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 15446.6ms TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2021-05-02 15:23:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:23:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:23:34,982 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 15:23:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:23:34,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-05-02 15:23:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:34,983 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:23:34,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:23:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:23:34,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:23:35,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:35,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:23:35,458 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2021-05-02 15:23:35,756 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 32 [2021-05-02 15:23:55,233 WARN L205 SmtUtils]: Spent 19.48 s on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2021-05-02 15:23:55,235 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:23:55,235 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:23:55,235 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:23:55,235 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:55,235 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 15:23:55,235 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:55,235 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:55,235 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:23:55,236 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:23:55,236 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:55,236 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 15:23:55,236 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:23:55,236 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:23:55,236 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:23:55,236 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 44) the Hoare annotation is: (let ((.cse3 (<= 0 main_~z~0)) (.cse4 (<= main_~z~0 20))) (or (and (let ((.cse0 (= main_~z~0 0))) (or (and (= main_~y~0 0) .cse0) (let ((.cse1 (+ main_~x~0 (- 1)))) (and (= (mod .cse1 main_~z~0) 0) (not .cse0) (let ((.cse2 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse2) 1) (+ .cse2 (* main_~z~0 (div main_~y~0 main_~z~0))))) (= (mod main_~y~0 main_~z~0) 0))))) .cse3 .cse4) (and (= main_~y~0 1) .cse3 (= main_~x~0 1) .cse4))) [2021-05-02 15:23:55,236 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 44) the Hoare annotation is: (let ((.cse1 (<= 0 main_~z~0)) (.cse0 (= main_~x~0 1)) (.cse3 (<= main_~z~0 20))) (or (and (= main_~z~0 0) .cse0) (and (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 (* main_~y~0 main_~z~0))) .cse1 (let ((.cse2 (div (+ main_~x~0 (- 1)) main_~z~0))) (= (+ (* main_~z~0 .cse2) 1) (+ .cse2 (* main_~z~0 (div main_~y~0 main_~z~0))))) (= (mod main_~y~0 main_~z~0) 0) .cse3) (and (= main_~y~0 1) .cse1 .cse0 .cse3))) [2021-05-02 15:23:55,236 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 23 47) the Hoare annotation is: true [2021-05-02 15:23:55,236 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~z~0) (<= main_~z~0 20)) [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 47) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point L45(line 45) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 47) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse3 (<= 0 main_~z~0)) (.cse4 (<= main_~z~0 20))) (or (and (let ((.cse0 (= main_~z~0 0))) (or (and (= main_~y~0 0) .cse0) (let ((.cse1 (+ main_~x~0 (- 1)))) (and (= (mod .cse1 main_~z~0) 0) (not .cse0) (let ((.cse2 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse2) 1) (+ .cse2 (* main_~z~0 (div main_~y~0 main_~z~0))))) (= (mod main_~y~0 main_~z~0) 0))))) .cse3 .cse4) (and (= main_~y~0 1) .cse3 (= main_~x~0 1) .cse4))) [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 44) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:23:55,237 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:23:55,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:23:55 BoogieIcfgContainer [2021-05-02 15:23:55,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:23:55,250 INFO L168 Benchmark]: Toolchain (without parser) took 49063.20 ms. Allocated memory was 186.6 MB in the beginning and 225.4 MB in the end (delta: 38.8 MB). Free memory was 149.8 MB in the beginning and 149.3 MB in the end (delta: 564.1 kB). Peak memory consumption was 107.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:55,250 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 166.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:23:55,250 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.14 ms. Allocated memory is still 186.6 MB. Free memory was 149.7 MB in the beginning and 168.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:55,250 INFO L168 Benchmark]: Boogie Preprocessor took 17.00 ms. Allocated memory is still 186.6 MB. Free memory was 168.7 MB in the beginning and 167.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:55,250 INFO L168 Benchmark]: RCFGBuilder took 199.92 ms. Allocated memory is still 186.6 MB. Free memory was 167.1 MB in the beginning and 151.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:55,250 INFO L168 Benchmark]: TraceAbstraction took 48528.14 ms. Allocated memory was 186.6 MB in the beginning and 225.4 MB in the end (delta: 38.8 MB). Free memory was 151.9 MB in the beginning and 149.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 109.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:55,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory is still 166.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.14 ms. Allocated memory is still 186.6 MB. Free memory was 149.7 MB in the beginning and 168.7 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.00 ms. Allocated memory is still 186.6 MB. Free memory was 168.7 MB in the beginning and 167.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 199.92 ms. Allocated memory is still 186.6 MB. Free memory was 167.1 MB in the beginning and 151.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 48528.14 ms. Allocated memory was 186.6 MB in the beginning and 225.4 MB in the end (delta: 38.8 MB). Free memory was 151.9 MB in the beginning and 149.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 109.1 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: 28423.7ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 9.7ms, AutomataDifference: 21759.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 20050.6ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 114 SDtfs, 81 SDslu, 504 SDs, 0 SdLazy, 305 SolverSat, 25 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 8132.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 17860.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 22 PreInvPairs, 35 NumberOfFragments, 243 HoareAnnotationTreeSize, 22 FomulaSimplifications, 268 FormulaSimplificationTreeSizeReduction, 108.1ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 774 FormulaSimplificationTreeSizeReductionInter, 19934.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 66.9ms SsaConstructionTime, 148.7ms SatisfiabilityAnalysisTime, 5215.8ms InterpolantComputationTime, 157 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 653 SizeOfPredicates, 11 NumberOfNonLiveVariables, 528 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 52/72 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: ((((y == 0 && z == 0) || ((((x + -1) % z == 0 && !(z == 0)) && z * ((x + -1) / z) + 1 == (x + -1) / z + z * (y / z)) && y % z == 0)) && 0 <= z) && z <= 20) || (((y == 1 && 0 <= z) && x == 1) && z <= 20) RESULT: Ultimate proved your program to be correct! Received shutdown request...