/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_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:19:59,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:19:59,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:19:59,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:19:59,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:19:59,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:19:59,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:19:59,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:19:59,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:19:59,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:19:59,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:19:59,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:19:59,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:19:59,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:19:59,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:19:59,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:19:59,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:19:59,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:19:59,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:19:59,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:19:59,851 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 15:19:59,879 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:19:59,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:19:59,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:19:59,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:19:59,881 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:19:59,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:19:59,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:19:59,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:19:59,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:19:59,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:19:59,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:19:59,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:19:59,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:19:59,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:19:59,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:19:59,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:19:59,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:19:59,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:19:59,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:19:59,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:19:59,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:19:59,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:19:59,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:19:59,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:19:59,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:19:59,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:19:59,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:19:59,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:19:59,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:20:00,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:20:00,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:20:00,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:20:00,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:20:00,235 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:20:00,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound1.c [2021-05-02 15:20:00,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ed59e1a/57ee440117114299b7dee01d2ae1cbd4/FLAGe23b1cd90 [2021-05-02 15:20:00,699 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:20:00,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound1.c [2021-05-02 15:20:00,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ed59e1a/57ee440117114299b7dee01d2ae1cbd4/FLAGe23b1cd90 [2021-05-02 15:20:01,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ed59e1a/57ee440117114299b7dee01d2ae1cbd4 [2021-05-02 15:20:01,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:20:01,127 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:20:01,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:20:01,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:20:01,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:20:01,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e96408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01, skipping insertion in model container [2021-05-02 15:20:01,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:20:01,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:20:01,241 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_unwindbound1.c[546,559] [2021-05-02 15:20:01,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:20:01,264 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:20:01,274 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_unwindbound1.c[546,559] [2021-05-02 15:20:01,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:20:01,318 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:20:01,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01 WrapperNode [2021-05-02 15:20:01,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:20:01,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:20:01,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:20:01,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:20:01,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (1/1) ... [2021-05-02 15:20:01,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:20:01,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:20:01,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:20:01,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:20:01,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (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 15:20:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:20:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:20:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:20:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:20:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:20:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:20:01,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:20:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:20:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:20:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:20:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:20:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:20:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:20:01,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:20:01,620 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:20:01,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:20:01 BoogieIcfgContainer [2021-05-02 15:20:01,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:20:01,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:20:01,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:20:01,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:20:01,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:20:01" (1/3) ... [2021-05-02 15:20:01,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622a5977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:20:01, skipping insertion in model container [2021-05-02 15:20:01,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:01" (2/3) ... [2021-05-02 15:20:01,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622a5977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:20:01, skipping insertion in model container [2021-05-02 15:20:01,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:20:01" (3/3) ... [2021-05-02 15:20:01,627 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound1.c [2021-05-02 15:20:01,631 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:20:01,634 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:20:01,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:20:01,665 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:20:01,665 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:20:01,665 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:20:01,665 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:20:01,665 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:20:01,665 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:20:01,666 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:20:01,666 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:20:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:20:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:20:01,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:01,702 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 15:20:01,702 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 730417173, now seen corresponding path program 1 times [2021-05-02 15:20:01,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:01,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966967701] [2021-05-02 15:20:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:01,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:20:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:01,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:20:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:01,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 15:20:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:01,894 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 15:20:01,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:01,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966967701] [2021-05-02 15:20:01,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966967701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:20:01,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:20:01,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:20:01,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183702237] [2021-05-02 15:20:01,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:20:01,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:20:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:20:01,911 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:01,981 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2021-05-02 15:20:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:20:01,983 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 15:20:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:01,988 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:20:01,989 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 15:20:01,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:20:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 15:20:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 15:20:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:20:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 15:20:02,018 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-02 15:20:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:02,018 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 15:20:02,018 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 15:20:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 15:20:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:20:02,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:02,020 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 15:20:02,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:20:02,020 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:02,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash -942473515, now seen corresponding path program 1 times [2021-05-02 15:20:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:02,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627256957] [2021-05-02 15:20:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:02,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:02,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129884617] [2021-05-02 15:20:02,066 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 15:20:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:20:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:02,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,337 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 15:20:02,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:02,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627256957] [2021-05-02 15:20:02,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:02,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129884617] [2021-05-02 15:20:02,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129884617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:02,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:02,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:20:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972535623] [2021-05-02 15:20:02,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:20:02,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:20:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:20:02,343 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 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 15:20:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:02,434 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 15:20:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:20:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 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 15:20:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:02,437 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:20:02,437 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:20:02,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:20:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:20:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 15:20:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 15:20:02,453 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 15:20:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:02,455 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 15:20:02,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 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 15:20:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 15:20:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 15:20:02,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:02,462 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:02,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:20:02,684 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash 769172850, now seen corresponding path program 1 times [2021-05-02 15:20:02,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:02,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098547427] [2021-05-02 15:20:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:02,701 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:02,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585157745] [2021-05-02 15:20:02,701 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 15:20:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:20:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:02,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:02,868 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 15:20:02,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:02,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098547427] [2021-05-02 15:20:02,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:02,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585157745] [2021-05-02 15:20:02,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585157745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:20:02,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:20:02,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:20:02,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371633942] [2021-05-02 15:20:02,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:20:02,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:20:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:20:02,871 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:02,883 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-05-02 15:20:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:20:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 15:20:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:02,885 INFO L225 Difference]: With dead ends: 40 [2021-05-02 15:20:02,886 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:20:02,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:20:02,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:20:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:20:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 15:20:02,892 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2021-05-02 15:20:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:02,892 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 15:20:02,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 15:20:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:20:02,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:02,893 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:03,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:03,113 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:03,114 INFO L82 PathProgramCache]: Analyzing trace with hash 431121724, now seen corresponding path program 1 times [2021-05-02 15:20:03,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:03,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028681425] [2021-05-02 15:20:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:03,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:03,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160178515] [2021-05-02 15:20:03,124 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 15:20:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:20:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:03,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:20:03,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:03,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028681425] [2021-05-02 15:20:03,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:03,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160178515] [2021-05-02 15:20:03,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160178515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:03,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:03,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:20:03,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720005158] [2021-05-02 15:20:03,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:20:03,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:03,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:20:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:20:03,410 INFO L87 Difference]: Start difference. First operand 32 states and 35 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, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:05,542 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 15:20:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:20:05,543 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, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 15:20:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:05,543 INFO L225 Difference]: With dead ends: 40 [2021-05-02 15:20:05,543 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:20:05,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:20:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:20:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:20:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 15:20:05,548 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2021-05-02 15:20:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:05,548 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 15:20:05,548 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, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 15:20:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 15:20:05,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:05,549 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:05,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:05,769 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1792638864, now seen corresponding path program 1 times [2021-05-02 15:20:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:05,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122113989] [2021-05-02 15:20:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:05,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:05,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738192611] [2021-05-02 15:20:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:20:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:05,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:20:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:20:05,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:05,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122113989] [2021-05-02 15:20:05,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:05,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738192611] [2021-05-02 15:20:05,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738192611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:05,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:05,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:20:05,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962443180] [2021-05-02 15:20:05,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:20:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:05,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:20:05,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:20:05,967 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:20:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:05,998 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-05-02 15:20:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:20:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 15:20:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:06,000 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:20:06,000 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 15:20:06,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:20:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 15:20:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 15:20:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0) internal successors, (19), 19 states have internal predecessors, (19), 6 states have call successors, (6), 5 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 15:20:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 15:20:06,007 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 31 [2021-05-02 15:20:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:06,007 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 15:20:06,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:20:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 15:20:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:20:06,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:06,008 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:06,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:06,213 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:06,213 INFO L82 PathProgramCache]: Analyzing trace with hash -341689321, now seen corresponding path program 1 times [2021-05-02 15:20:06,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:06,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145968101] [2021-05-02 15:20:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:06,220 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:06,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118478202] [2021-05-02 15:20:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:20:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:06,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:20:06,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:06,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:20:06,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:06,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145968101] [2021-05-02 15:20:06,438 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:06,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118478202] [2021-05-02 15:20:06,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118478202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:06,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:06,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:20:06,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570186506] [2021-05-02 15:20:06,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:20:06,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:06,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:20:06,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:20:06,440 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:06,539 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-02 15:20:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:20:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-02 15:20:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:06,539 INFO L225 Difference]: With dead ends: 29 [2021-05-02 15:20:06,539 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:20:06,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:20:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:20:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:20:06,540 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 15:20:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:20:06,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 15:20:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:06,540 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:20:06,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:20:06,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:20:06,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:20:06,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:20:07,026 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-02 15:20:07,026 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-02 15:20:07,026 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-02 15:20:07,026 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:20:07,026 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:20:07,026 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:20:07,026 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 15:20:07,027 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 45) the Hoare annotation is: (let ((.cse0 (<= 1 main_~k~0)) (.cse1 (<= 1 main_~z~0))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (<= 1 main_~c~0) (<= ~counter~0 0) .cse1 (<= 0 ~counter~0) (= main_~x~0 1) (= main_~z~0 main_~y~0)) (not (<= 0 |old(~counter~0)|)) (and .cse0 (<= 1 ~counter~0) (= main_~x~0 (+ main_~z~0 1)) .cse1 (= main_~y~0 (* main_~z~0 main_~z~0))))) [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 51) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 51) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~k~0) (<= 1 main_~c~0) (<= 1 ~counter~0) (<= 1 main_~z~0) (= main_~x~0 1) (= main_~z~0 main_~y~0)) (not (<= 0 |old(~counter~0)|))) [2021-05-02 15:20:07,027 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:20:07,027 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 51) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:20:07,027 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:20:07,027 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~z~0) (= ~counter~0 |old(~counter~0)|)) (not (<= 0 |old(~counter~0)|))) [2021-05-02 15:20:07,028 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (and (exists ((v_main_~x~0_11 Int) (main_~z~0 Int)) (let ((.cse0 (* v_main_~x~0_11 main_~z~0))) (and (<= 1 main_~z~0) (= .cse0 (+ v_main_~x~0_11 main_~x~0)) (= (+ .cse0 1) (+ v_main_~x~0_11 main_~y~0))))) (<= 1 main_~z~0))) [2021-05-02 15:20:07,028 INFO L198 CegarLoopUtils]: For program point L49-1(line 49) no Hoare annotation was computed. [2021-05-02 15:20:07,028 INFO L198 CegarLoopUtils]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:20:07,028 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-02 15:20:07,028 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-02 15:20:07,028 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-02 15:20:07,028 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:20:07,028 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:20:07,028 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-02 15:20:07,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:20:07 BoogieIcfgContainer [2021-05-02 15:20:07,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:20:07,038 INFO L168 Benchmark]: Toolchain (without parser) took 5911.25 ms. Allocated memory was 206.6 MB in the beginning and 270.5 MB in the end (delta: 64.0 MB). Free memory was 170.6 MB in the beginning and 174.5 MB in the end (delta: -3.9 MB). Peak memory consumption was 60.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:07,038 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:20:07,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.89 ms. Allocated memory is still 206.6 MB. Free memory was 170.4 MB in the beginning and 190.6 MB in the end (delta: -20.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:07,039 INFO L168 Benchmark]: Boogie Preprocessor took 38.38 ms. Allocated memory is still 206.6 MB. Free memory was 190.6 MB in the beginning and 189.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:07,039 INFO L168 Benchmark]: RCFGBuilder took 262.80 ms. Allocated memory is still 206.6 MB. Free memory was 189.0 MB in the beginning and 173.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:07,039 INFO L168 Benchmark]: TraceAbstraction took 5415.91 ms. Allocated memory was 206.6 MB in the beginning and 270.5 MB in the end (delta: 64.0 MB). Free memory was 172.8 MB in the beginning and 174.5 MB in the end (delta: -1.8 MB). Peak memory consumption was 62.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:07,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 188.89 ms. Allocated memory is still 206.6 MB. Free memory was 170.4 MB in the beginning and 190.6 MB in the end (delta: -20.2 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.38 ms. Allocated memory is still 206.6 MB. Free memory was 190.6 MB in the beginning and 189.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 262.80 ms. Allocated memory is still 206.6 MB. Free memory was 189.0 MB in the beginning and 173.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5415.91 ms. Allocated memory was 206.6 MB in the beginning and 270.5 MB in the end (delta: 64.0 MB). Free memory was 172.8 MB in the beginning and 174.5 MB in the end (delta: -1.8 MB). Peak memory consumption was 62.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5094.1ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 35.7ms, AutomataDifference: 2470.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 268.4ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 136 SDtfs, 73 SDslu, 387 SDs, 0 SdLazy, 254 SolverSat, 25 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2207.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 303.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 26 NumberOfFragments, 197 HoareAnnotationTreeSize, 20 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 55.3ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 291 FormulaSimplificationTreeSizeReductionInter, 204.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 53.1ms SsaConstructionTime, 146.1ms SatisfiabilityAnalysisTime, 873.0ms InterpolantComputationTime, 163 NumberOfCodeBlocks, 163 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 157 ConstructedInterpolants, 2 QuantifiedInterpolants, 496 SizeOfPredicates, 13 NumberOfNonLiveVariables, 693 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 25/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((!(\old(counter) <= 0) || ((((((1 <= k && 1 <= c) && counter <= 0) && 1 <= z) && 0 <= counter) && x == 1) && z == y)) || !(0 <= \old(counter))) || ((((1 <= k && 1 <= counter) && x == z + 1) && 1 <= z) && y == z * z) RESULT: Ultimate proved your program to be correct! Received shutdown request...