/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/egcd-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:47:01,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:47:01,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:47:01,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:47:01,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:47:01,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:47:01,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:47:01,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:47:01,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:47:01,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:47:01,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:47:01,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:47:01,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:47:01,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:47:01,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:47:01,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:47:01,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:47:01,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:47:01,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:47:01,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:47:01,239 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 14:47:01,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:47:01,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:47:01,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:47:01,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:47:01,254 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:47:01,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:47:01,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:47:01,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:47:01,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:47:01,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:47:01,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:47:01,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:47:01,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:47:01,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:47:01,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:47:01,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:47:01,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:47:01,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:47:01,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:47:01,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:47:01,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:47:01,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:47:01,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:47:01,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:47:01,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:47:01,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:47:01,514 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:47:01,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-02 14:47:01,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722babccc/ecffeed03f8543ca8618cfc62dc0047b/FLAG22d27f615 [2021-05-02 14:47:01,890 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:47:01,891 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-02 14:47:01,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722babccc/ecffeed03f8543ca8618cfc62dc0047b/FLAG22d27f615 [2021-05-02 14:47:02,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722babccc/ecffeed03f8543ca8618cfc62dc0047b [2021-05-02 14:47:02,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:47:02,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:47:02,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:47:02,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:47:02,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:47:02,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c8718c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02, skipping insertion in model container [2021-05-02 14:47:02,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:47:02,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:47:02,414 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/egcd-ll_valuebound1.c[489,502] [2021-05-02 14:47:02,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:47:02,429 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:47:02,449 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/egcd-ll_valuebound1.c[489,502] [2021-05-02 14:47:02,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:47:02,490 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:47:02,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02 WrapperNode [2021-05-02 14:47:02,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:47:02,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:47:02,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:47:02,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:47:02,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (1/1) ... [2021-05-02 14:47:02,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:47:02,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:47:02,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:47:02,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:47:02,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (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 14:47:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:47:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:47:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:47:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:47:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:47:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:47:02,596 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:47:02,596 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:47:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:47:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:47:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:47:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:47:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:47:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:47:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:47:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:47:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:47:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:47:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:47:02,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:47:02,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:47:02,831 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:47:02,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:47:02 BoogieIcfgContainer [2021-05-02 14:47:02,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:47:02,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:47:02,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:47:02,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:47:02,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:47:02" (1/3) ... [2021-05-02 14:47:02,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b1adc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:47:02, skipping insertion in model container [2021-05-02 14:47:02,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:02" (2/3) ... [2021-05-02 14:47:02,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b1adc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:47:02, skipping insertion in model container [2021-05-02 14:47:02,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:47:02" (3/3) ... [2021-05-02 14:47:02,836 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound1.c [2021-05-02 14:47:02,839 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:47:02,842 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:47:02,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:47:02,864 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:47:02,864 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:47:02,864 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:47:02,865 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:47:02,865 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:47:02,865 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:47:02,865 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:47:02,865 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:47:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:47:02,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:47:02,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:02,878 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 14:47:02,878 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-02 14:47:02,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:02,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114888427] [2021-05-02 14:47:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:47:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:47:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:47:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:47:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:47:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,048 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 14:47:03,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:03,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114888427] [2021-05-02 14:47:03,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114888427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:47:03,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:47:03,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:47:03,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810570319] [2021-05-02 14:47:03,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:47:03,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:47:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:47:03,061 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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 14:47:03,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:03,247 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-02 14:47:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:47:03,249 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 14:47:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:03,255 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:47:03,255 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:47:03,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:47:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:47:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:47:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:47:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 14:47:03,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 14:47:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:03,302 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 14:47:03,302 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 14:47:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 14:47:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:47:03,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:03,303 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 14:47:03,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:47:03,304 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-02 14:47:03,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:03,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128884654] [2021-05-02 14:47:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:03,339 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:03,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597431577] [2021-05-02 14:47:03,340 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 14:47:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:47:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:03,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:47:03,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:03,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128884654] [2021-05-02 14:47:03,547 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:03,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597431577] [2021-05-02 14:47:03,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597431577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:03,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:03,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:47:03,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402283140] [2021-05-02 14:47:03,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:47:03,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:03,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:47:03,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:47:03,550 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:47:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:03,652 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-02 14:47:03,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:47:03,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 14:47:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:03,654 INFO L225 Difference]: With dead ends: 48 [2021-05-02 14:47:03,654 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:47:03,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:47:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:47:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 14:47:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:47:03,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 14:47:03,668 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 14:47:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:03,669 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 14:47:03,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:47:03,669 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 14:47:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:47:03,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:03,670 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] [2021-05-02 14:47:03,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:47:03,880 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:03,881 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-02 14:47:03,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:03,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438330536] [2021-05-02 14:47:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:03,892 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:03,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558493970] [2021-05-02 14:47:03,892 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 14:47:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:03,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:47:03,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:03,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:03,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,201 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 14:47:04,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:04,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438330536] [2021-05-02 14:47:04,202 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:04,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558493970] [2021-05-02 14:47:04,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558493970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:47:04,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:47:04,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 14:47:04,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842145577] [2021-05-02 14:47:04,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:47:04,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:47:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:04,205 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 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 14:47:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:04,328 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-02 14:47:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:47:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 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 38 [2021-05-02 14:47:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:04,333 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:47:04,333 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:47:04,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:47:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:47:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 14:47:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:47:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 14:47:04,358 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 14:47:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:04,358 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 14:47:04,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 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 14:47:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 14:47:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:47:04,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:04,360 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] [2021-05-02 14:47:04,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:04,565 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-02 14:47:04,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:04,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392152883] [2021-05-02 14:47:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:04,583 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:04,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128313391] [2021-05-02 14:47:04,583 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 14:47:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:47:04,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:04,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:47:04,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:04,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392152883] [2021-05-02 14:47:04,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:04,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128313391] [2021-05-02 14:47:04,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128313391] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:47:04,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:47:04,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 14:47:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758754160] [2021-05-02 14:47:04,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:47:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:47:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:04,835 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 14:47:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:04,977 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-02 14:47:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:47:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-02 14:47:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:04,978 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:47:04,978 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:47:04,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:47:04,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:47:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 14:47:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:47:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 14:47:05,000 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 14:47:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:05,001 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 14:47:05,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 14:47:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 14:47:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:47:05,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:05,003 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] [2021-05-02 14:47:05,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:05,223 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:05,223 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-02 14:47:05,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:05,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952728308] [2021-05-02 14:47:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:05,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:05,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743144155] [2021-05-02 14:47:05,236 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 14:47:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:47:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:47:05,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952728308] [2021-05-02 14:47:05,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743144155] [2021-05-02 14:47:05,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743144155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:47:05,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:47:05,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:47:05,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688719574] [2021-05-02 14:47:05,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:47:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:05,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:47:05,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:47:05,352 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:47:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:05,383 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 14:47:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:47:05,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 14:47:05,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:05,384 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:47:05,384 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:47:05,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:47:05,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:47:05,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 14:47:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:47:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 14:47:05,393 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 14:47:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:05,393 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 14:47:05,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:47:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 14:47:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:47:05,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:05,394 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-05-02 14:47:05,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:05,602 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-02 14:47:05,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:05,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788531093] [2021-05-02 14:47:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:05,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:05,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407733060] [2021-05-02 14:47:05,626 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 14:47:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 14:47:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:05,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:47:05,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:05,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788531093] [2021-05-02 14:47:05,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:05,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407733060] [2021-05-02 14:47:05,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407733060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:05,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:05,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:47:05,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658319251] [2021-05-02 14:47:05,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:47:05,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:05,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:47:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:47:05,820 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:47:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:05,887 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-05-02 14:47:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:47:05,893 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), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2021-05-02 14:47:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:05,894 INFO L225 Difference]: With dead ends: 82 [2021-05-02 14:47:05,894 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 14:47:05,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 14:47:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-05-02 14:47:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 30 states have internal predecessors, (30), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:47:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 14:47:05,903 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 51 [2021-05-02 14:47:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:05,903 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 14:47:05,903 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), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:47:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 14:47:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 14:47:05,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:05,904 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1] [2021-05-02 14:47:06,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:47:06,121 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-02 14:47:06,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:06,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690259890] [2021-05-02 14:47:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:06,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:06,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089484663] [2021-05-02 14:47:06,129 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 14:47:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 14:47:06,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:06,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:47:06,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:06,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690259890] [2021-05-02 14:47:06,470 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:06,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089484663] [2021-05-02 14:47:06,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089484663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:06,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:06,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:47:06,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497612899] [2021-05-02 14:47:06,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:47:06,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:47:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:47:06,471 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-05-02 14:47:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:06,570 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-05-02 14:47:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:47:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 54 [2021-05-02 14:47:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:06,571 INFO L225 Difference]: With dead ends: 69 [2021-05-02 14:47:06,571 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:47:06,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:47:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:47:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:47:06,572 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 14:47:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:47:06,572 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-02 14:47:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:06,572 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:47:06,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2021-05-02 14:47:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:47:06,572 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:47:06,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:06,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:47:07,307 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 14:47:07,307 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 14:47:07,307 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 14:47:07,307 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:47:07,307 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 14:47:07,307 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:47:07,307 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:47:07,307 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:47:07,307 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:47:07,308 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:47:07,308 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 14:47:07,308 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 14:47:07,308 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:47:07,308 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:47:07,308 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 52) the Hoare annotation is: (and (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,308 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 14:47:07,308 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2021-05-02 14:47:07,308 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,308 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (and (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,308 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 59) no Hoare annotation was computed. [2021-05-02 14:47:07,308 INFO L198 CegarLoopUtils]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-05-02 14:47:07,308 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,308 INFO L194 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,309 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 59) the Hoare annotation is: true [2021-05-02 14:47:07,309 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 14:47:07,309 INFO L198 CegarLoopUtils]: For program point L57(line 57) no Hoare annotation was computed. [2021-05-02 14:47:07,309 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 14:47:07,309 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 14:47:07,309 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,309 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 14:47:07,309 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 14:47:07,309 INFO L198 CegarLoopUtils]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-05-02 14:47:07,309 INFO L194 CegarLoopUtils]: At program point L43-2(lines 35 52) the Hoare annotation is: (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,310 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= 1 main_~a~0) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-02 14:47:07,310 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 14:47:07,310 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 14:47:07,310 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 14:47:07,310 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:47:07,310 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:47:07,310 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 14:47:07,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:47:07 BoogieIcfgContainer [2021-05-02 14:47:07,322 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:47:07,323 INFO L168 Benchmark]: Toolchain (without parser) took 5003.70 ms. Allocated memory was 223.3 MB in the beginning and 306.2 MB in the end (delta: 82.8 MB). Free memory was 187.0 MB in the beginning and 253.6 MB in the end (delta: -66.6 MB). Peak memory consumption was 160.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:07,323 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 203.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:47:07,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.03 ms. Allocated memory is still 223.3 MB. Free memory was 186.9 MB in the beginning and 205.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:07,323 INFO L168 Benchmark]: Boogie Preprocessor took 34.71 ms. Allocated memory is still 223.3 MB. Free memory was 205.4 MB in the beginning and 203.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:07,323 INFO L168 Benchmark]: RCFGBuilder took 305.59 ms. Allocated memory is still 223.3 MB. Free memory was 203.8 MB in the beginning and 187.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:07,323 INFO L168 Benchmark]: TraceAbstraction took 4489.55 ms. Allocated memory was 223.3 MB in the beginning and 306.2 MB in the end (delta: 82.8 MB). Free memory was 187.0 MB in the beginning and 253.6 MB in the end (delta: -66.5 MB). Peak memory consumption was 161.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:47:07,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 203.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 169.03 ms. Allocated memory is still 223.3 MB. Free memory was 186.9 MB in the beginning and 205.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.71 ms. Allocated memory is still 223.3 MB. Free memory was 205.4 MB in the beginning and 203.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 305.59 ms. Allocated memory is still 223.3 MB. Free memory was 203.8 MB in the beginning and 187.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4489.55 ms. Allocated memory was 223.3 MB in the beginning and 306.2 MB in the end (delta: 82.8 MB). Free memory was 187.0 MB in the beginning and 253.6 MB in the end (delta: -66.5 MB). Peak memory consumption was 161.5 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3922.7ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 11.8ms, AutomataDifference: 794.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 520.8ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 240 SDtfs, 156 SDslu, 812 SDs, 0 SdLazy, 501 SolverSat, 138 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 421.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 291 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 467.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 104.1ms AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 52 PreInvPairs, 63 NumberOfFragments, 339 HoareAnnotationTreeSize, 52 FomulaSimplifications, 471 FormulaSimplificationTreeSizeReduction, 107.8ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 527 FormulaSimplificationTreeSizeReductionInter, 402.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 54.5ms SsaConstructionTime, 133.1ms SatisfiabilityAnalysisTime, 1215.3ms InterpolantComputationTime, 301 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 294 ConstructedInterpolants, 0 QuantifiedInterpolants, 1011 SizeOfPredicates, 27 NumberOfNonLiveVariables, 964 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 228/248 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: ((((((((r == 0 && q == 0) && b == y) && a == y * r + x * p) && 1 <= y) && x <= 1) && 1 <= a) && p == 1) && s == 1) && y <= 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...