/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:21:08,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:21:08,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:21:08,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:21:08,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:21:08,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:21:08,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:21:08,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:21:08,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:21:08,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:21:08,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:21:08,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:21:08,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:21:08,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:21:08,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:21:08,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:21:08,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:21:08,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:21:08,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:21:08,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:21:08,943 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 15:21:08,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:21:08,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:21:08,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:21:08,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:21:08,975 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:21:08,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:21:08,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:21:08,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:21:08,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:21:08,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:21:08,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:21:08,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:21:08,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:21:08,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:21:08,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:21:08,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:21:08,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:21:08,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:21:08,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:21:08,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:21:08,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:21:08,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:21:08,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:21:08,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:21:08,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:21:08,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:21:08,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:21:08,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:21:08,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:21:09,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:21:09,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:21:09,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:21:09,282 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:21:09,283 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:21:09,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound100.c [2021-05-02 15:21:09,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23fc6186b/42c7bcba91174ee1bc878dbcc5fb8f93/FLAGce4d5089f [2021-05-02 15:21:09,761 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:21:09,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound100.c [2021-05-02 15:21:09,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23fc6186b/42c7bcba91174ee1bc878dbcc5fb8f93/FLAGce4d5089f [2021-05-02 15:21:10,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23fc6186b/42c7bcba91174ee1bc878dbcc5fb8f93 [2021-05-02 15:21:10,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:21:10,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:21:10,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:10,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:21:10,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:21:10,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15454b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10, skipping insertion in model container [2021-05-02 15:21:10,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:21:10,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:21:10,353 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound100.c[546,559] [2021-05-02 15:21:10,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:10,373 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:21:10,396 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_valuebound100.c[546,559] [2021-05-02 15:21:10,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:10,433 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:21:10,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10 WrapperNode [2021-05-02 15:21:10,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:10,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:21:10,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:21:10,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:21:10,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (1/1) ... [2021-05-02 15:21:10,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:21:10,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:21:10,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:21:10,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:21:10,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (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 15:21:10,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:21:10,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:21:10,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:21:10,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:21:10,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:21:10,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:21:10,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:21:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:21:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:21:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:21:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:21:10,546 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:21:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:21:10,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:21:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:21:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:21:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:21:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:21:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:21:10,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:21:10,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:21:10,723 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:21:10,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:10 BoogieIcfgContainer [2021-05-02 15:21:10,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:21:10,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:21:10,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:21:10,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:21:10,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:21:10" (1/3) ... [2021-05-02 15:21:10,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a59107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:10, skipping insertion in model container [2021-05-02 15:21:10,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:10" (2/3) ... [2021-05-02 15:21:10,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a59107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:10, skipping insertion in model container [2021-05-02 15:21:10,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:10" (3/3) ... [2021-05-02 15:21:10,729 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_valuebound100.c [2021-05-02 15:21:10,734 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:21:10,736 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:21:10,764 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:21:10,780 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:21:10,780 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:21:10,780 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:21:10,780 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:21:10,780 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:21:10,780 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:21:10,793 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:21:10,793 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:21:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:21:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:21:10,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:10,814 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:10,814 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash 774216096, now seen corresponding path program 1 times [2021-05-02 15:21:10,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:10,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879737096] [2021-05-02 15:21:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:21:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:11,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:21:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:11,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:21:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:11,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:21:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:11,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:21:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:21:11,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:11,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879737096] [2021-05-02 15:21:11,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879737096] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:11,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:11,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:21:11,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250078326] [2021-05-02 15:21:11,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:21:11,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:21:11,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:11,108 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:21:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:11,215 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-05-02 15:21:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:21:11,217 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:21:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:11,222 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:21:11,223 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:21:11,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:21:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:21:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:21:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 15:21:11,264 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2021-05-02 15:21:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:11,265 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 15:21:11,265 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:21:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 15:21:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:21:11,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:11,267 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:11,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:21:11,268 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1105237916, now seen corresponding path program 1 times [2021-05-02 15:21:11,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:11,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315320551] [2021-05-02 15:21:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:11,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:11,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740495802] [2021-05-02 15:21:11,309 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 15:21:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:21:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:21:11,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:11,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315320551] [2021-05-02 15:21:11,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:11,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740495802] [2021-05-02 15:21:11,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740495802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:11,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:11,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:21:11,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130213141] [2021-05-02 15:21:11,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:21:11,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:21:11,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:21:11,643 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:21:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:11,738 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 15:21:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:21:11,739 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:21:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:11,740 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:21:11,740 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:21:11,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:21:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:21:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 15:21:11,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:21:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-02 15:21:11,748 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2021-05-02 15:21:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:11,749 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-02 15:21:11,749 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:21:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-02 15:21:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:21:11,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:11,751 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:11,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:21:11,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1493430927, now seen corresponding path program 1 times [2021-05-02 15:21:11,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:11,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299298550] [2021-05-02 15:21:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:11,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:11,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554529226] [2021-05-02 15:21:11,983 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 15:21:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:21:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:12,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:21:12,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:12,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299298550] [2021-05-02 15:21:12,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:12,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554529226] [2021-05-02 15:21:12,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554529226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:12,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:12,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:21:12,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358394643] [2021-05-02 15:21:12,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:21:12,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:12,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:21:12,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:21:12,312 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:21:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:14,484 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 15:21:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:21:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-05-02 15:21:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:14,501 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:21:14,501 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 15:21:14,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:21:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 15:21:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 15:21:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:21:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 15:21:14,508 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 40 [2021-05-02 15:21:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:14,509 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 15:21:14,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:21:14,509 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 15:21:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:21:14,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:14,510 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:14,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:14,711 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:14,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1541394437, now seen corresponding path program 1 times [2021-05-02 15:21:14,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:14,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545344989] [2021-05-02 15:21:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:14,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:14,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904488668] [2021-05-02 15:21:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:14,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:21:14,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:14,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:21:14,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545344989] [2021-05-02 15:21:14,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904488668] [2021-05-02 15:21:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904488668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:14,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:14,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:21:14,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742139335] [2021-05-02 15:21:14,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:21:14,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:14,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:21:14,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:21:14,932 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:21:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:15,067 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 15:21:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:21:15,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-05-02 15:21:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:15,071 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:21:15,071 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 15:21:15,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:21:15,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 15:21:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 15:21:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:21:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 15:21:15,087 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 40 [2021-05-02 15:21:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:15,087 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 15:21:15,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:21:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 15:21:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:21:15,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:15,099 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 15:21:15,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:15,313 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1278557884, now seen corresponding path program 2 times [2021-05-02 15:21:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:15,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409376148] [2021-05-02 15:21:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:15,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:15,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856314580] [2021-05-02 15:21:15,325 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 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 15:21:15,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:21:15,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:15,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:21:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:15,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:15,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,662 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 15:21:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:21:21,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409376148] [2021-05-02 15:21:21,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:21,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856314580] [2021-05-02 15:21:21,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856314580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:21,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:21,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:21:21,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973882979] [2021-05-02 15:21:21,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:21:21,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:21:21,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2021-05-02 15:21:21,728 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:21:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:32,324 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-02 15:21:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:21:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 15:21:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:32,325 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:21:32,325 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 15:21:32,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 6222.7ms TimeCoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2021-05-02 15:21:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 15:21:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 15:21:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:21:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-02 15:21:32,333 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 47 [2021-05-02 15:21:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:32,334 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-02 15:21:32,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:21:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-02 15:21:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:21:32,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:32,335 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:32,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:32,543 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:32,543 INFO L82 PathProgramCache]: Analyzing trace with hash 206093093, now seen corresponding path program 3 times [2021-05-02 15:21:32,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:32,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125654127] [2021-05-02 15:21:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:32,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:32,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232200168] [2021-05-02 15:21:32,554 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:32,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:21:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:32,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:21:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:32,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:36,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:36,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:36,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:21:36,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125654127] [2021-05-02 15:21:36,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232200168] [2021-05-02 15:21:36,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232200168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:36,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:36,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:21:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267879933] [2021-05-02 15:21:36,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:21:36,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:21:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=71, Unknown=2, NotChecked=0, Total=90 [2021-05-02 15:21:36,877 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:21:49,998 WARN L205 SmtUtils]: Spent 12.54 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-02 15:21:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:52,218 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-05-02 15:21:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:21:52,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-05-02 15:21:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:52,219 INFO L225 Difference]: With dead ends: 45 [2021-05-02 15:21:52,219 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:21:52,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 17236.2ms TimeCoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2021-05-02 15:21:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:21:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:21:52,222 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 15:21:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:21:52,222 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-02 15:21:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:52,222 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:21:52,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:21:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:21:52,222 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:21:52,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:21:52,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:21:52,829 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-05-02 15:21:53,017 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 27 [2021-05-02 15:21:53,104 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-02 15:21:53,105 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-02 15:21:53,105 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-02 15:21:53,105 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:21:53,105 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 15:21:53,105 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:21:53,105 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:21:53,105 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:21:53,105 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:21:53,105 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:21:53,105 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-02 15:21:53,106 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-02 15:21:53,106 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:21:53,106 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:21:53,106 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= main_~z~0 100) (<= 0 main_~z~0)) [2021-05-02 15:21:53,106 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 52) no Hoare annotation was computed. [2021-05-02 15:21:53,106 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (and (<= main_~z~0 100) (<= 0 main_~z~0) (exists ((v_main_~x~0_11 Int) (main_~z~0 Int)) (let ((.cse0 (* v_main_~x~0_11 main_~z~0))) (and (<= main_~z~0 100) (<= 0 main_~z~0) (= .cse0 (+ v_main_~x~0_11 main_~x~0)) (= (+ .cse0 1) (+ v_main_~x~0_11 main_~y~0)))))) [2021-05-02 15:21:53,106 INFO L198 CegarLoopUtils]: For program point L50-1(line 50) no Hoare annotation was computed. [2021-05-02 15:21:53,106 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 52) no Hoare annotation was computed. [2021-05-02 15:21:53,106 INFO L194 CegarLoopUtils]: At program point L36-2(lines 36 46) the Hoare annotation is: (and (<= 1 main_~k~0) (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse0 (+ main_~x~0 (- 1)))) (and (= (mod .cse0 main_~z~0) 0) (let ((.cse1 (div .cse0 main_~z~0))) (= (+ main_~y~0 (* main_~z~0 .cse1)) (+ main_~z~0 (* main_~z~0 main_~z~0 .cse1)))) (not .cse2))) (and .cse2 (= main_~x~0 1)))) (<= main_~z~0 100) (<= 0 main_~z~0)) [2021-05-02 15:21:53,107 INFO L198 CegarLoopUtils]: For program point L36-3(lines 36 46) no Hoare annotation was computed. [2021-05-02 15:21:53,107 INFO L198 CegarLoopUtils]: For program point L30(line 30) no Hoare annotation was computed. [2021-05-02 15:21:53,107 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 52) the Hoare annotation is: true [2021-05-02 15:21:53,107 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (and (<= main_~z~0 100) (<= 0 main_~z~0)) [2021-05-02 15:21:53,107 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (and (<= main_~z~0 100) (<= 0 main_~z~0)) [2021-05-02 15:21:53,107 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-02 15:21:53,107 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-02 15:21:53,107 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~k~0) (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse0 (+ main_~x~0 (- 1)))) (and (= (mod .cse0 main_~z~0) 0) (let ((.cse1 (div .cse0 main_~z~0))) (= (+ main_~y~0 (* main_~z~0 .cse1)) (+ main_~z~0 (* main_~z~0 main_~z~0 .cse1)))) (not .cse2))) (and .cse2 (= main_~x~0 1)))) (<= main_~z~0 100) (<= 0 main_~z~0)) [2021-05-02 15:21:53,107 INFO L198 CegarLoopUtils]: For program point L37-1(lines 36 46) no Hoare annotation was computed. [2021-05-02 15:21:53,107 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-02 15:21:53,107 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-02 15:21:53,107 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-02 15:21:53,108 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:21:53,108 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:21:53,108 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-02 15:21:53,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:21:53 BoogieIcfgContainer [2021-05-02 15:21:53,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:21:53,121 INFO L168 Benchmark]: Toolchain (without parser) took 42934.81 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 166.3 MB in the beginning and 138.2 MB in the end (delta: 28.2 MB). Peak memory consumption was 75.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:53,121 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:21:53,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.84 ms. Allocated memory is still 202.4 MB. Free memory was 166.1 MB in the beginning and 184.7 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:53,121 INFO L168 Benchmark]: Boogie Preprocessor took 37.78 ms. Allocated memory is still 202.4 MB. Free memory was 184.7 MB in the beginning and 183.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:53,121 INFO L168 Benchmark]: RCFGBuilder took 249.39 ms. Allocated memory is still 202.4 MB. Free memory was 183.1 MB in the beginning and 168.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:53,121 INFO L168 Benchmark]: TraceAbstraction took 42395.11 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 167.9 MB in the beginning and 138.2 MB in the end (delta: 29.8 MB). Peak memory consumption was 77.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:21:53,122 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 247.84 ms. Allocated memory is still 202.4 MB. Free memory was 166.1 MB in the beginning and 184.7 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.78 ms. Allocated memory is still 202.4 MB. Free memory was 184.7 MB in the beginning and 183.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 249.39 ms. Allocated memory is still 202.4 MB. Free memory was 183.1 MB in the beginning and 168.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 42395.11 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 167.9 MB in the beginning and 138.2 MB in the end (delta: 29.8 MB). Peak memory consumption was 77.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 41645.5ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 26.4ms, AutomataDifference: 28501.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 680.5ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 97 SDslu, 586 SDs, 0 SdLazy, 527 SolverSat, 34 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 14849.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 23774.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 13 LocationsWithAnnotation, 25 PreInvPairs, 37 NumberOfFragments, 189 HoareAnnotationTreeSize, 25 FomulaSimplifications, 78 FormulaSimplificationTreeSizeReduction, 121.1ms HoareSimplificationTime, 13 FomulaSimplificationsInter, 897 FormulaSimplificationTreeSizeReductionInter, 551.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 59.6ms SsaConstructionTime, 180.6ms SatisfiabilityAnalysisTime, 11422.6ms InterpolantComputationTime, 247 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 241 ConstructedInterpolants, 1 QuantifiedInterpolants, 779 SizeOfPredicates, 18 NumberOfNonLiveVariables, 723 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 168/198 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: 36]: Loop Invariant Derived loop invariant: ((1 <= k && ((((x + -1) % z == 0 && y + z * ((x + -1) / z) == z + z * z * ((x + -1) / z)) && !(z == 0)) || (z == 0 && x == 1))) && z <= 100) && 0 <= z RESULT: Ultimate proved your program to be correct! Received shutdown request...