/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/sqrt1-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:25:29,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:25:29,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:25:29,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:25:29,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:25:29,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:25:29,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:25:29,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:25:29,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:25:29,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:25:29,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:25:29,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:25:29,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:25:29,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:25:29,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:25:29,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:25:29,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:25:29,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:25:29,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:25:29,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:25:29,238 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 17:25:29,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:25:29,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:25:29,269 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:25:29,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:25:29,270 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:25:29,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:25:29,270 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:25:29,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:25:29,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:25:29,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:25:29,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:25:29,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:25:29,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:25:29,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:25:29,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:25:29,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:25:29,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:25:29,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:25:29,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:25:29,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:25:29,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:25:29,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:25:29,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:25:29,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:25:29,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:25:29,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:25:29,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:25:29,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:25:29,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:25:29,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:25:29,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:25:29,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:25:29,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:25:29,549 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:25:29,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2021-05-02 17:25:29,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5159735/f5b120b2d3ca400a825c917e64637b00/FLAGd2a1226bb [2021-05-02 17:25:29,987 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:25:29,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2021-05-02 17:25:29,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5159735/f5b120b2d3ca400a825c917e64637b00/FLAGd2a1226bb [2021-05-02 17:25:30,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5159735/f5b120b2d3ca400a825c917e64637b00 [2021-05-02 17:25:30,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:25:30,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:25:30,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:25:30,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:25:30,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:25:30,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712e4de1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30, skipping insertion in model container [2021-05-02 17:25:30,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:25:30,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:25:30,130 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/sqrt1-ll_valuebound5.c[520,533] [2021-05-02 17:25:30,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:25:30,144 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:25:30,159 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/sqrt1-ll_valuebound5.c[520,533] [2021-05-02 17:25:30,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:25:30,196 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:25:30,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30 WrapperNode [2021-05-02 17:25:30,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:25:30,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:25:30,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:25:30,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:25:30,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (1/1) ... [2021-05-02 17:25:30,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:25:30,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:25:30,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:25:30,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:25:30,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (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 17:25:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:25:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:25:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:25:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:25:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:25:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:25:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:25:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:25:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:25:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:25:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:25:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:25:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:25:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:25:30,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:25:30,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:25:30,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:25:30,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:25:30,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:25:30,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:25:30,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:25:30,539 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:25:30,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:25:30 BoogieIcfgContainer [2021-05-02 17:25:30,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:25:30,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:25:30,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:25:30,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:25:30,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:25:30" (1/3) ... [2021-05-02 17:25:30,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fe6494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:25:30, skipping insertion in model container [2021-05-02 17:25:30,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:25:30" (2/3) ... [2021-05-02 17:25:30,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51fe6494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:25:30, skipping insertion in model container [2021-05-02 17:25:30,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:25:30" (3/3) ... [2021-05-02 17:25:30,557 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound5.c [2021-05-02 17:25:30,561 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:25:30,571 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:25:30,583 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:25:30,607 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:25:30,607 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:25:30,607 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:25:30,607 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:25:30,607 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:25:30,607 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:25:30,607 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:25:30,607 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:25:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:25:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:25:30,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:30,626 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:30,627 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-02 17:25:30,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:30,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014512191] [2021-05-02 17:25:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:25:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:30,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:25:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:25:30,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:30,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014512191] [2021-05-02 17:25:30,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014512191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:25:30,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:25:30,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:25:30,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357131324] [2021-05-02 17:25:30,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:25:30,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:25:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:25:30,889 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:25:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:31,022 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-02 17:25:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:25:31,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:25:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:31,029 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:25:31,029 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:25:31,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:25:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:25:31,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:25:31,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:25:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 17:25:31,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 17:25:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:31,066 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 17:25:31,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:25:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 17:25:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:25:31,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:31,069 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:31,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:25:31,069 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:31,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-02 17:25:31,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:31,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967550667] [2021-05-02 17:25:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:31,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:25:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:31,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:25:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:25:31,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:31,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967550667] [2021-05-02 17:25:31,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967550667] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:25:31,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:25:31,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:25:31,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521576818] [2021-05-02 17:25:31,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:25:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:25:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:25:31,189 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:25:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:31,422 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 17:25:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:25:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:25:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:31,424 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:25:31,424 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:25:31,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:25:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 17:25:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:25:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 17:25:31,434 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 17:25:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:31,434 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 17:25:31,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:25:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 17:25:31,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:25:31,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:31,435 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:31,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:25:31,435 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:31,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:31,435 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2021-05-02 17:25:31,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:31,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019178967] [2021-05-02 17:25:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:31,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:31,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568804955] [2021-05-02 17:25:31,457 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 17:25:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:25:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:25:31,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:31,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019178967] [2021-05-02 17:25:31,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:31,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568804955] [2021-05-02 17:25:31,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568804955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:31,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:31,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:31,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065030148] [2021-05-02 17:25:31,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:31,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:31,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:31,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:31,666 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:25:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:31,797 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 17:25:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:25:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 17:25:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:31,799 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:25:31,799 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 17:25:31,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 17:25:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 17:25:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:25:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 17:25:31,818 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 17:25:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:31,819 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 17:25:31,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:25:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 17:25:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:25:31,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:31,821 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 17:25:32,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:25:32,039 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2021-05-02 17:25:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:32,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914713859] [2021-05-02 17:25:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:32,052 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:32,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461207082] [2021-05-02 17:25:32,052 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 17:25:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:25:32,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:25:32,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:32,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914713859] [2021-05-02 17:25:32,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:32,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461207082] [2021-05-02 17:25:32,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461207082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:32,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:32,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 17:25:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93225381] [2021-05-02 17:25:32,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:25:32,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:25:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:25:32,210 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 17:25:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:32,278 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-05-02 17:25:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:25:32,279 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), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 17:25:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:32,280 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:25:32,280 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 17:25:32,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:25:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 17:25:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 17:25:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 17:25:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 17:25:32,287 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 17:25:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:32,288 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 17:25:32,288 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), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 17:25:32,288 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 17:25:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:25:32,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:32,289 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:32,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:32,498 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:32,499 INFO L82 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2021-05-02 17:25:32,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:32,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254995034] [2021-05-02 17:25:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:32,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:32,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637901197] [2021-05-02 17:25:32,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:32,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:25:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:25:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:25:32,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254995034] [2021-05-02 17:25:32,667 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637901197] [2021-05-02 17:25:32,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637901197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:32,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:32,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:32,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438962791] [2021-05-02 17:25:32,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:32,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:32,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:32,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:32,671 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:25:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:32,776 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 17:25:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:25:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 17:25:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:32,777 INFO L225 Difference]: With dead ends: 57 [2021-05-02 17:25:32,777 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 17:25:32,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 17:25:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 17:25:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 17:25:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 17:25:32,784 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 17:25:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:32,784 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 17:25:32,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:25:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 17:25:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:25:32,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:32,785 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:33,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:33,002 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2021-05-02 17:25:33,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:33,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119894554] [2021-05-02 17:25:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:33,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:33,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494690175] [2021-05-02 17:25:33,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:33,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 17:25:33,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:25:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:33,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:25:33,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:33,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119894554] [2021-05-02 17:25:33,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:33,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494690175] [2021-05-02 17:25:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494690175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:33,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:33,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:33,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093517701] [2021-05-02 17:25:33,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:33,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:33,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:33,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:33,202 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:25:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:33,307 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-02 17:25:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:25:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 17:25:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:33,308 INFO L225 Difference]: With dead ends: 61 [2021-05-02 17:25:33,308 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:25:33,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:25:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 17:25:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 17:25:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 17:25:33,315 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 17:25:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:33,315 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 17:25:33,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:25:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 17:25:33,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:25:33,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:33,316 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:33,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:33,529 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash -463567166, now seen corresponding path program 4 times [2021-05-02 17:25:33,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:33,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390627956] [2021-05-02 17:25:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:33,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:33,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473992888] [2021-05-02 17:25:33,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 17:25:33,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:25:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:25:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 17:25:33,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:33,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390627956] [2021-05-02 17:25:33,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:33,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473992888] [2021-05-02 17:25:33,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473992888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:33,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:33,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:25:33,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608137819] [2021-05-02 17:25:33,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:25:33,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:25:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:25:33,728 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:25:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:33,795 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-05-02 17:25:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:25:33,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 17:25:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:33,797 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:25:33,797 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 17:25:33,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 17:25:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 17:25:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 17:25:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 17:25:33,804 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2021-05-02 17:25:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:33,804 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 17:25:33,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:25:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 17:25:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 17:25:33,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:33,805 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:34,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:25:34,022 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:34,023 INFO L82 PathProgramCache]: Analyzing trace with hash 790038090, now seen corresponding path program 5 times [2021-05-02 17:25:34,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:34,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651823895] [2021-05-02 17:25:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:34,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:34,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541399014] [2021-05-02 17:25:34,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 17:25:34,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 17:25:34,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:25:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 17:25:34,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:34,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651823895] [2021-05-02 17:25:34,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:34,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541399014] [2021-05-02 17:25:34,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541399014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:34,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:34,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:25:34,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161045945] [2021-05-02 17:25:34,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:25:34,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:25:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:25:34,257 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 17:25:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:34,394 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-02 17:25:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:25:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 17:25:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:34,396 INFO L225 Difference]: With dead ends: 74 [2021-05-02 17:25:34,396 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:25:34,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:25:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:25:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 17:25:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:25:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 17:25:34,403 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2021-05-02 17:25:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:34,403 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 17:25:34,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 17:25:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 17:25:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:25:34,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:34,404 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:34,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:34,622 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1996886914, now seen corresponding path program 6 times [2021-05-02 17:25:34,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:34,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357439334] [2021-05-02 17:25:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:34,645 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:34,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927663563] [2021-05-02 17:25:34,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 17:25:34,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 17:25:34,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:34,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:25:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:34,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 17:25:34,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357439334] [2021-05-02 17:25:34,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927663563] [2021-05-02 17:25:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927663563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:34,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:34,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:25:34,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094357957] [2021-05-02 17:25:34,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:25:34,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:25:34,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:25:34,921 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:25:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:35,066 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-02 17:25:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:25:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 17:25:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:35,069 INFO L225 Difference]: With dead ends: 78 [2021-05-02 17:25:35,069 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 17:25:35,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:25:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 17:25:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 17:25:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 17:25:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 17:25:35,084 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2021-05-02 17:25:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:35,085 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 17:25:35,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:25:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 17:25:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:25:35,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:35,091 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:35,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:35,299 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:35,299 INFO L82 PathProgramCache]: Analyzing trace with hash -415362136, now seen corresponding path program 7 times [2021-05-02 17:25:35,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:35,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230375127] [2021-05-02 17:25:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:35,305 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:35,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916617202] [2021-05-02 17:25:35,306 INFO L93 rtionOrderModulation]: Changing assertion order to 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 17:25:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:25:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:25:35,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:35,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 17:25:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230375127] [2021-05-02 17:25:35,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916617202] [2021-05-02 17:25:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916617202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:35,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:35,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:25:35,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483195016] [2021-05-02 17:25:35,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:25:35,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:25:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:25:35,620 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 17:25:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:35,671 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-05-02 17:25:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:25:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-02 17:25:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:35,674 INFO L225 Difference]: With dead ends: 73 [2021-05-02 17:25:35,674 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:25:35,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:25:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:25:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:25:35,677 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 17:25:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:25:35,678 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-05-02 17:25:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:35,678 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:25:35,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 17:25:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:25:35,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:25:35,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:25:35,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:25:36,292 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 28 [2021-05-02 17:25:36,604 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 28 [2021-05-02 17:25:36,608 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 17:25:36,608 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 17:25:36,608 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 17:25:36,608 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:25:36,608 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 17:25:36,608 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:25:36,608 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:25:36,608 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 17:25:36,609 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:25:36,609 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:25:36,609 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 17:25:36,609 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 17:25:36,609 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:25:36,609 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:25:36,609 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:25:36,610 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 5))) (or (and .cse0 (= 5 main_~t~0) .cse1 (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) .cse1 (= main_~s~0 4)))) [2021-05-02 17:25:36,610 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 5))) (or (and .cse0 (= 5 main_~t~0) .cse1 (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) .cse1 (= main_~s~0 4)))) [2021-05-02 17:25:36,610 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:25:36,611 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 17:25:36,611 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:25:36,611 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4))) [2021-05-02 17:25:36,611 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 5))) (or (and .cse0 (= 5 main_~t~0) .cse1 (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) .cse1 (= main_~s~0 4)))) [2021-05-02 17:25:36,611 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2021-05-02 17:25:36,611 INFO L194 CegarLoopUtils]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 5))) (or (and .cse0 (= 5 main_~t~0) .cse1 (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) .cse1 (= main_~s~0 4)))) [2021-05-02 17:25:36,611 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4))) [2021-05-02 17:25:36,611 INFO L201 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-05-02 17:25:36,611 INFO L198 CegarLoopUtils]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-05-02 17:25:36,611 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= 5 main_~t~0) (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= main_~a~0 2)) (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-02 17:25:36,611 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 17:25:36,611 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 17:25:36,611 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 17:25:36,611 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:25:36,611 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:25:36,612 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 17:25:36,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:25:36 BoogieIcfgContainer [2021-05-02 17:25:36,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:25:36,626 INFO L168 Benchmark]: Toolchain (without parser) took 6612.48 ms. Allocated memory was 195.0 MB in the beginning and 282.1 MB in the end (delta: 87.0 MB). Free memory was 160.1 MB in the beginning and 131.2 MB in the end (delta: 28.9 MB). Peak memory consumption was 117.8 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:36,626 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 195.0 MB. Free memory is still 176.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:25:36,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.32 ms. Allocated memory is still 195.0 MB. Free memory was 159.9 MB in the beginning and 178.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:36,626 INFO L168 Benchmark]: Boogie Preprocessor took 37.73 ms. Allocated memory is still 195.0 MB. Free memory was 178.3 MB in the beginning and 177.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:36,626 INFO L168 Benchmark]: RCFGBuilder took 304.24 ms. Allocated memory is still 195.0 MB. Free memory was 176.6 MB in the beginning and 162.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:36,626 INFO L168 Benchmark]: TraceAbstraction took 6084.95 ms. Allocated memory was 195.0 MB in the beginning and 282.1 MB in the end (delta: 87.0 MB). Free memory was 161.9 MB in the beginning and 131.2 MB in the end (delta: 30.7 MB). Peak memory consumption was 120.8 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:36,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 195.0 MB. Free memory is still 176.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 181.32 ms. Allocated memory is still 195.0 MB. Free memory was 159.9 MB in the beginning and 178.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.73 ms. Allocated memory is still 195.0 MB. Free memory was 178.3 MB in the beginning and 177.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 304.24 ms. Allocated memory is still 195.0 MB. Free memory was 176.6 MB in the beginning and 162.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6084.95 ms. Allocated memory was 195.0 MB in the beginning and 282.1 MB in the end (delta: 87.0 MB). Free memory was 161.9 MB in the beginning and 131.2 MB in the end (delta: 30.7 MB). Peak memory consumption was 120.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5284.2ms, OverallIterations: 10, TraceHistogramMax: 10, EmptinessCheckTime: 20.2ms, AutomataDifference: 1225.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 718.0ms, InitialAbstractionConstructionTime: 11.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 300 SDtfs, 116 SDslu, 1122 SDs, 0 SdLazy, 953 SolverSat, 103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 627.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 401 GetRequests, 326 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 607.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=9, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 97.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 43 PreInvPairs, 64 NumberOfFragments, 366 HoareAnnotationTreeSize, 43 FomulaSimplifications, 2074 FormulaSimplificationTreeSizeReduction, 79.7ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 1047 FormulaSimplificationTreeSizeReductionInter, 628.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 77.8ms SsaConstructionTime, 239.9ms SatisfiabilityAnalysisTime, 1449.5ms InterpolantComputationTime, 409 NumberOfCodeBlocks, 392 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 399 ConstructedInterpolants, 0 QuantifiedInterpolants, 1325 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1239 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 522/625 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: 30]: Loop Invariant Derived loop invariant: (((((0 <= n && 5 == t) && n <= 5) && a == 2) && s == 9) || ((((0 <= n && n <= 5) && a == 0) && a * 2 + 1 == t) && s == 1)) || ((((0 <= n && s == t + 1) && a == 1) && n <= 5) && s == 4) RESULT: Ultimate proved your program to be correct! Received shutdown request...