/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/egcd3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:00:20,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:00:20,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:00:20,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:00:20,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:00:20,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:00:20,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:00:20,947 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 15:00:20,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:00:20,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:00:20,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:00:20,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:00:20,970 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:00:20,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:00:20,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:00:20,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:00:20,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:00:20,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:00:20,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:00:20,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:00:20,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:00:20,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:00:20,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:00:20,971 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:00:20,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:00:20,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:00:20,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:00:20,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:00:20,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:00:21,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:00:21,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:00:21,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:00:21,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:00:21,246 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:00:21,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-02 15:00:21,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40443e95e/6f0dedfc867f4553bfadbd631a13463c/FLAG85487f85d [2021-05-02 15:00:21,637 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:00:21,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-02 15:00:21,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40443e95e/6f0dedfc867f4553bfadbd631a13463c/FLAG85487f85d [2021-05-02 15:00:21,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40443e95e/6f0dedfc867f4553bfadbd631a13463c [2021-05-02 15:00:21,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:00:21,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:00:21,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:21,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:00:21,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:00:21,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71029708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21, skipping insertion in model container [2021-05-02 15:00:21,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:00:21,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:00:21,793 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/egcd3-ll_valuebound1.c[490,503] [2021-05-02 15:00:21,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:21,829 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:00:21,837 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/egcd3-ll_valuebound1.c[490,503] [2021-05-02 15:00:21,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:00:21,866 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:00:21,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21 WrapperNode [2021-05-02 15:00:21,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:00:21,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:00:21,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:00:21,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:00:21,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (1/1) ... [2021-05-02 15:00:21,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:00:21,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:00:21,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:00:21,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:00:21,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (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 15:00:21,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:00:21,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:00:21,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:00:21,983 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:00:21,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:00:21,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:00:21,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:00:21,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:00:21,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:00:22,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:00:22,201 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:00:22,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:22 BoogieIcfgContainer [2021-05-02 15:00:22,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:00:22,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:00:22,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:00:22,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:00:22,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:00:21" (1/3) ... [2021-05-02 15:00:22,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8b626f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:22, skipping insertion in model container [2021-05-02 15:00:22,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:00:21" (2/3) ... [2021-05-02 15:00:22,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8b626f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:00:22, skipping insertion in model container [2021-05-02 15:00:22,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:00:22" (3/3) ... [2021-05-02 15:00:22,207 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2021-05-02 15:00:22,210 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:00:22,212 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:00:22,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:00:22,246 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:00:22,247 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:00:22,247 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:00:22,247 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:00:22,247 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:00:22,247 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:00:22,247 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:00:22,247 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:00:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:00:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:00:22,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:22,280 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 15:00:22,281 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:22,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-02 15:00:22,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:22,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182477969] [2021-05-02 15:00:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:00:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:00:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:00:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:00:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:00:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,552 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 15:00:22,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:22,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182477969] [2021-05-02 15:00:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182477969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:22,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:22,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:00:22,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881949478] [2021-05-02 15:00:22,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:00:22,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:00:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:22,568 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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 15:00:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:22,703 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-02 15:00:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:00:22,705 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 15:00:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:22,710 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:00:22,710 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:00:22,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:00:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:00:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:00:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:00:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 15:00:22,753 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 15:00:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:22,753 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 15:00:22,754 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 15:00:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 15:00:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:00:22,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:22,756 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, 1] [2021-05-02 15:00:22,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:00:22,756 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:22,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-02 15:00:22,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:22,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858905883] [2021-05-02 15:00:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:22,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:22,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372289498] [2021-05-02 15:00:22,779 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 15:00:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:00:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:22,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:00:22,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858905883] [2021-05-02 15:00:22,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372289498] [2021-05-02 15:00:22,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372289498] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:22,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:22,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:00:22,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629128848] [2021-05-02 15:00:23,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:00:23,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:00:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:00:23,000 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:23,081 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 15:00:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:00:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 15:00:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:23,082 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:00:23,082 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 15:00:23,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 15:00:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 15:00:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:00:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:00:23,090 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 15:00:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:23,090 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:00:23,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:00:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:00:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:00:23,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:23,091 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, 1, 1, 1, 1] [2021-05-02 15:00:23,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:00:23,301 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-02 15:00:23,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:23,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121259356] [2021-05-02 15:00:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:23,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:23,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248310727] [2021-05-02 15:00:23,315 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 15:00:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:00:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:23,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,541 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 15:00:23,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121259356] [2021-05-02 15:00:23,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:23,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248310727] [2021-05-02 15:00:23,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248310727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:23,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:23,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 15:00:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139052921] [2021-05-02 15:00:23,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:23,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:23,544 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:00:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:23,637 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-02 15:00:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:00:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 15:00:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:23,640 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:00:23,640 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:00:23,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:00:23,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:00:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:00:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 15:00:23,664 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 15:00:23,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:23,664 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 15:00:23,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:00:23,664 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 15:00:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:00:23,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:23,667 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] [2021-05-02 15:00:23,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:23,873 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-02 15:00:23,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:23,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229222951] [2021-05-02 15:00:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:23,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:23,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793465643] [2021-05-02 15:00:23,886 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 15:00:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 15:00:23,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:23,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:23,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:00:24,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:24,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229222951] [2021-05-02 15:00:24,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:24,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793465643] [2021-05-02 15:00:24,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793465643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:24,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:24,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:00:24,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578367769] [2021-05-02 15:00:24,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:00:24,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:24,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:00:24,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:00:24,072 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:24,197 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-05-02 15:00:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:00:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-02 15:00:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:24,200 INFO L225 Difference]: With dead ends: 79 [2021-05-02 15:00:24,201 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:00:24,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:00:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2021-05-02 15:00:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:00:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-05-02 15:00:24,217 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 39 [2021-05-02 15:00:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:24,219 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-05-02 15:00:24,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:00:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-05-02 15:00:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:00:24,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:24,220 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, 1, 1] [2021-05-02 15:00:24,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:24,429 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:24,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-02 15:00:24,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:24,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218733409] [2021-05-02 15:00:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:24,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:24,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378186644] [2021-05-02 15:00:24,439 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 15:00:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:24,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:00:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:24,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:00:24,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218733409] [2021-05-02 15:00:24,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:24,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378186644] [2021-05-02 15:00:24,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378186644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:00:24,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:00:24,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 15:00:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694705593] [2021-05-02 15:00:24,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:00:24,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:24,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:00:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:00:24,678 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:00:24,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:24,791 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2021-05-02 15:00:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:00:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2021-05-02 15:00:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:24,794 INFO L225 Difference]: With dead ends: 59 [2021-05-02 15:00:24,794 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 15:00:24,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 15:00:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-05-02 15:00:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:00:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-05-02 15:00:24,805 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2021-05-02 15:00:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:24,805 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-05-02 15:00:24,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:00:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-05-02 15:00:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:00:24,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:24,806 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 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, 1, 1] [2021-05-02 15:00:25,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:25,021 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-02 15:00:25,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:25,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534617340] [2021-05-02 15:00:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:25,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:25,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330259087] [2021-05-02 15:00:25,030 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 15:00:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:25,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:00:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:25,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:00:25,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:25,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534617340] [2021-05-02 15:00:25,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:25,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330259087] [2021-05-02 15:00:25,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330259087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:25,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:25,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:25,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805903102] [2021-05-02 15:00:25,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:25,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:25,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:25,186 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:25,312 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-05-02 15:00:25,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:25,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 15:00:25,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:25,313 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:00:25,313 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 15:00:25,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 15:00:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 15:00:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:00:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-05-02 15:00:25,321 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 47 [2021-05-02 15:00:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:25,321 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-05-02 15:00:25,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:00:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-05-02 15:00:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:00:25,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:25,322 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1] [2021-05-02 15:00:25,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:00:25,537 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-02 15:00:25,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:25,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739678069] [2021-05-02 15:00:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:25,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:25,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845226261] [2021-05-02 15:00:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:00:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:25,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 15:00:25,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:25,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739678069] [2021-05-02 15:00:25,743 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:25,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845226261] [2021-05-02 15:00:25,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845226261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:25,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:25,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:00:25,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667569581] [2021-05-02 15:00:25,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:00:25,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:00:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:00:25,745 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:00:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:25,873 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2021-05-02 15:00:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:00:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-02 15:00:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:25,874 INFO L225 Difference]: With dead ends: 89 [2021-05-02 15:00:25,874 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 15:00:25,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:00:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 15:00:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2021-05-02 15:00:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:00:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2021-05-02 15:00:25,883 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 52 [2021-05-02 15:00:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:25,883 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2021-05-02 15:00:25,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:00:25,883 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2021-05-02 15:00:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:00:25,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:25,884 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:00:26,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:26,092 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-02 15:00:26,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:26,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479864465] [2021-05-02 15:00:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:26,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:26,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85606165] [2021-05-02 15:00:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:26,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 15:00:26,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:26,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:00:26,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:26,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479864465] [2021-05-02 15:00:26,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:26,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85606165] [2021-05-02 15:00:26,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85606165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:26,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:26,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 15:00:26,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399226810] [2021-05-02 15:00:26,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 15:00:26,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:26,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 15:00:26,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:00:26,597 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:00:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:26,990 INFO L93 Difference]: Finished difference Result 143 states and 182 transitions. [2021-05-02 15:00:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:00:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2021-05-02 15:00:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:26,992 INFO L225 Difference]: With dead ends: 143 [2021-05-02 15:00:26,992 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 15:00:26,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-05-02 15:00:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 15:00:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-05-02 15:00:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:00:27,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-05-02 15:00:27,003 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 64 [2021-05-02 15:00:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:27,003 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-05-02 15:00:27,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:00:27,004 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-05-02 15:00:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 15:00:27,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:00:27,004 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 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, 1, 1] [2021-05-02 15:00:27,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:27,221 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:00:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:00:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-02 15:00:27,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:00:27,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468978682] [2021-05-02 15:00:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:00:27,230 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:00:27,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585162720] [2021-05-02 15:00:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:00:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:00:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:00:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:00:27,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:00:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-05-02 15:00:27,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:00:27,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468978682] [2021-05-02 15:00:27,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:00:27,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585162720] [2021-05-02 15:00:27,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585162720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:00:27,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:00:27,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:00:27,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594950782] [2021-05-02 15:00:27,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:00:27,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:00:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:00:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:00:27,444 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:00:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:00:27,518 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-05-02 15:00:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:00:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 15:00:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:00:27,519 INFO L225 Difference]: With dead ends: 97 [2021-05-02 15:00:27,519 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:00:27,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:00:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:00:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:00:27,520 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 15:00:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:00:27,520 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-05-02 15:00:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:00:27,520 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:00:27,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:00:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:00:27,521 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:00:27,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:00:27,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:00:27,992 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-05-02 15:00:28,453 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 31 [2021-05-02 15:00:28,660 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 15:00:28,660 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 15:00:28,660 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 15:00:28,660 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:00:28,661 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 15:00:28,661 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:00:28,661 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:00:28,661 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:00:28,661 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:00:28,661 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:00:28,661 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 15:00:28,661 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 15:00:28,661 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:00:28,661 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:00:28,661 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0)) (.cse2 (<= main_~x~0 1)) (.cse3 (<= main_~y~0 1))) (or (and (= main_~p~0 0) .cse0 (= main_~r~0 1) (= (+ main_~p~0 main_~q~0) 1) .cse1 (= (+ main_~a~0 main_~b~0) main_~x~0) .cse2 (= main_~a~0 main_~y~0) (= (+ main_~s~0 1) 0) .cse3) (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~a~0 main_~x~0) (<= main_~b~0 1) (<= 1 main_~b~0) .cse1 .cse2 (= main_~p~0 1) (= main_~s~0 1) .cse3))) [2021-05-02 15:00:28,661 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 73) the Hoare annotation is: (and (= main_~p~0 0) (<= 1 main_~x~0) (= main_~r~0 1) (= (+ main_~p~0 main_~q~0) 1) (<= 1 main_~y~0) (= (+ main_~a~0 main_~b~0) main_~x~0) (<= main_~x~0 1) (= main_~a~0 main_~y~0) (= (+ main_~s~0 1) 0) (<= main_~y~0 1)) [2021-05-02 15:00:28,661 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2021-05-02 15:00:28,661 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~k~0 0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (= main_~r~0 0) (<= 1 main_~v~0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 15:00:28,661 INFO L198 CegarLoopUtils]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-05-02 15:00:28,662 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2021-05-02 15:00:28,662 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-02 15:00:28,662 INFO L198 CegarLoopUtils]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-05-02 15:00:28,662 INFO L194 CegarLoopUtils]: At program point L49-2(lines 49 59) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~k~0 0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (= main_~r~0 0) (<= 1 main_~v~0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 15:00:28,662 INFO L198 CegarLoopUtils]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-05-02 15:00:28,662 INFO L198 CegarLoopUtils]: For program point L74(line 74) no Hoare annotation was computed. [2021-05-02 15:00:28,662 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-02 15:00:28,662 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~k~0 0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (= main_~r~0 0) (<= 1 main_~v~0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 15:00:28,662 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~k~0 0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (= main_~r~0 0) (<= 1 main_~v~0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 15:00:28,662 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2021-05-02 15:00:28,662 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 1 main_~x~0)) (.cse2 (= main_~a~0 main_~x~0)) (.cse3 (<= main_~b~0 1)) (.cse4 (<= 1 main_~b~0)) (.cse5 (= main_~r~0 0)) (.cse6 (<= 1 main_~y~0)) (.cse7 (<= main_~x~0 1)) (.cse8 (= main_~p~0 1)) (.cse9 (= main_~s~0 1)) (.cse10 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~k~0 1) (= main_~x~0 (+ main_~b~0 main_~c~0)) .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse0 .cse1 .cse2 (= main_~k~0 0) .cse3 .cse4 .cse5 (= main_~c~0 main_~a~0) .cse6 .cse7 .cse8 .cse9 .cse10))) [2021-05-02 15:00:28,662 INFO L198 CegarLoopUtils]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-05-02 15:00:28,662 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2021-05-02 15:00:28,662 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 15:00:28,662 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 15:00:28,662 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 15:00:28,663 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~k~0 0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (= main_~r~0 0) (<= 1 main_~v~0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 15:00:28,663 INFO L198 CegarLoopUtils]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-05-02 15:00:28,663 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 15:00:28,663 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 15:00:28,663 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 15:00:28,663 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:00:28,663 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:00:28,663 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 15:00:28,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:00:28 BoogieIcfgContainer [2021-05-02 15:00:28,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:00:28,675 INFO L168 Benchmark]: Toolchain (without parser) took 7016.24 ms. Allocated memory was 203.4 MB in the beginning and 293.6 MB in the end (delta: 90.2 MB). Free memory was 169.1 MB in the beginning and 250.7 MB in the end (delta: -81.6 MB). Peak memory consumption was 156.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:28,675 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 203.4 MB. Free memory is still 185.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:00:28,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.08 ms. Allocated memory is still 203.4 MB. Free memory was 168.8 MB in the beginning and 158.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:28,675 INFO L168 Benchmark]: Boogie Preprocessor took 73.61 ms. Allocated memory is still 203.4 MB. Free memory was 158.7 MB in the beginning and 186.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:28,675 INFO L168 Benchmark]: RCFGBuilder took 260.85 ms. Allocated memory is still 203.4 MB. Free memory was 186.3 MB in the beginning and 169.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:28,675 INFO L168 Benchmark]: TraceAbstraction took 6470.84 ms. Allocated memory was 203.4 MB in the beginning and 293.6 MB in the end (delta: 90.2 MB). Free memory was 169.1 MB in the beginning and 250.7 MB in the end (delta: -81.6 MB). Peak memory consumption was 157.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:00:28,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 203.4 MB. Free memory is still 185.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 206.08 ms. Allocated memory is still 203.4 MB. Free memory was 168.8 MB in the beginning and 158.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.61 ms. Allocated memory is still 203.4 MB. Free memory was 158.7 MB in the beginning and 186.8 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 260.85 ms. Allocated memory is still 203.4 MB. Free memory was 186.3 MB in the beginning and 169.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6470.84 ms. Allocated memory was 203.4 MB in the beginning and 293.6 MB in the end (delta: 90.2 MB). Free memory was 169.1 MB in the beginning and 250.7 MB in the end (delta: -81.6 MB). Peak memory consumption was 157.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5493.3ms, OverallIterations: 9, TraceHistogramMax: 8, EmptinessCheckTime: 16.6ms, AutomataDifference: 1313.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 923.0ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 322 SDtfs, 505 SDslu, 1321 SDs, 0 SdLazy, 1002 SolverSat, 248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 617.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 425 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 902.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=8, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 108.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 31 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 69 PreInvPairs, 82 NumberOfFragments, 492 HoareAnnotationTreeSize, 69 FomulaSimplifications, 1116 FormulaSimplificationTreeSizeReduction, 115.1ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 710 FormulaSimplificationTreeSizeReductionInter, 798.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 110.5ms SsaConstructionTime, 216.7ms SatisfiabilityAnalysisTime, 1624.6ms InterpolantComputationTime, 422 NumberOfCodeBlocks, 422 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 413 ConstructedInterpolants, 0 QuantifiedInterpolants, 1963 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1393 ConjunctsInSsa, 218 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 341/385 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: (((((((((p == 0 && 1 <= x) && r == 1) && p + q == 1) && 1 <= y) && a + b == x) && x <= 1) && a == y) && s + 1 == 0) && y <= 1) || ((((((((((r == 0 && q == 0) && 1 <= x) && a == x) && b <= 1) && 1 <= b) && 1 <= y) && x <= 1) && p == 1) && s == 1) && y <= 1) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((q == 0 && 1 <= x) && a == x) && b <= 1) && 1 <= b) && r == 0) && k == 1) && x == b + c) && 1 <= y) && x <= 1) && p == 1) && s == 1) && y <= 1) || ((((((((((((q == 0 && 1 <= x) && a == x) && k == 0) && b <= 1) && 1 <= b) && r == 0) && c == a) && 1 <= y) && x <= 1) && p == 1) && s == 1) && y <= 1) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((q == 0 && 1 <= x) && k == 0) && a == x) && b <= 1) && r == 0) && 1 <= v) && b == v) && 1 <= y) && c == a) && d == 1) && x <= 1) && p == 1) && s == 1) && y <= 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...