/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/divbin2_valuebound5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:36:09,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:36:09,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:36:09,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:36:09,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:36:09,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:36:09,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:36:09,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:36:09,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:36:09,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:36:09,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:36:09,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:36:09,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:36:09,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:36:09,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:36:09,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:36:09,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:36:09,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:36:09,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:36:09,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:36:09,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:36:09,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:36:09,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:36:09,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:36:09,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:36:09,352 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:36:09,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:36:09,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:36:09,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:36:09,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:36:09,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:36:09,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:36:09,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:36:09,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:36:09,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:36:09,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:36:09,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:36:09,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:36:09,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:36:09,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:36:09,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:36:09,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:36:09,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:36:09,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:36:09,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:36:09,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:36:09,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:36:09,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:36:09,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:36:09,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:36:09,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:36:09,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:36:09,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:36:09,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:36:09,634 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:36:09,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2021-05-02 14:36:09,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c347d732c/8cb1490516424850a8e572fed9f58ba5/FLAG2b26c9dbe [2021-05-02 14:36:10,076 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:36:10,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound5.i [2021-05-02 14:36:10,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c347d732c/8cb1490516424850a8e572fed9f58ba5/FLAG2b26c9dbe [2021-05-02 14:36:10,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c347d732c/8cb1490516424850a8e572fed9f58ba5 [2021-05-02 14:36:10,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:36:10,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:36:10,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:36:10,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:36:10,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:36:10,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2326e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10, skipping insertion in model container [2021-05-02 14:36:10,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:36:10,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:36:10,240 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/divbin2_valuebound5.i[959,972] [2021-05-02 14:36:10,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:36:10,282 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:36:10,290 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/divbin2_valuebound5.i[959,972] [2021-05-02 14:36:10,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:36:10,309 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:36:10,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10 WrapperNode [2021-05-02 14:36:10,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:36:10,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:36:10,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:36:10,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:36:10,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... [2021-05-02 14:36:10,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:36:10,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:36:10,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:36:10,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:36:10,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:36:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:36:10,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:36:10,410 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:36:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:36:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:36:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:36:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:36:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:36:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:36:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:36:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:36:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:36:10,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:36:10,575 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:36:10,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:36:10 BoogieIcfgContainer [2021-05-02 14:36:10,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:36:10,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:36:10,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:36:10,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:36:10,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:36:10" (1/3) ... [2021-05-02 14:36:10,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e30fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:36:10, skipping insertion in model container [2021-05-02 14:36:10,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:36:10" (2/3) ... [2021-05-02 14:36:10,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e30fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:36:10, skipping insertion in model container [2021-05-02 14:36:10,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:36:10" (3/3) ... [2021-05-02 14:36:10,585 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2021-05-02 14:36:10,589 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:36:10,591 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:36:10,600 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:36:10,636 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:36:10,636 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:36:10,636 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:36:10,636 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:36:10,636 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:36:10,636 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:36:10,636 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:36:10,636 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:36:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:36:10,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:10,653 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:10,653 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2021-05-02 14:36:10,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:10,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121214450] [2021-05-02 14:36:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:10,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:36:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:10,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:36:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:10,837 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 14:36:10,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:10,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121214450] [2021-05-02 14:36:10,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121214450] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:10,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:10,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:36:10,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458547632] [2021-05-02 14:36:10,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:36:10,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:10,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:36:10,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:10,852 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 14:36:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:10,913 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-05-02 14:36:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:36:10,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2021-05-02 14:36:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:10,920 INFO L225 Difference]: With dead ends: 51 [2021-05-02 14:36:10,920 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 14:36:10,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 14:36:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 14:36:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 14:36:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 14:36:10,953 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-02 14:36:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:10,953 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 14:36:10,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 14:36:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 14:36:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 14:36:10,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:10,955 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:10,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:36:10,955 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2021-05-02 14:36:10,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:10,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546179364] [2021-05-02 14:36:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:10,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:10,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923472324] [2021-05-02 14:36:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:11,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:36:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:11,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:11,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:11,297 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 14:36:11,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546179364] [2021-05-02 14:36:11,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923472324] [2021-05-02 14:36:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923472324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:11,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:11,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:36:11,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580668381] [2021-05-02 14:36:11,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:36:11,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:11,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:36:11,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:36:11,303 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 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 14:36:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:11,404 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-02 14:36:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:36:11,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 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 19 [2021-05-02 14:36:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:11,405 INFO L225 Difference]: With dead ends: 37 [2021-05-02 14:36:11,406 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:36:11,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:36:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:36:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:36:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:36:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 14:36:11,411 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2021-05-02 14:36:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:11,412 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 14:36:11,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (4), 2 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 14:36:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 14:36:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 14:36:11,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:11,413 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] [2021-05-02 14:36:11,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:36:11,628 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1211706883, now seen corresponding path program 1 times [2021-05-02 14:36:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:11,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934601669] [2021-05-02 14:36:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:11,637 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:11,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282435370] [2021-05-02 14:36:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:36:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:11,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:11,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:11,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:11,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934601669] [2021-05-02 14:36:11,871 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:11,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282435370] [2021-05-02 14:36:11,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282435370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:11,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:11,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:36:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937434251] [2021-05-02 14:36:11,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:36:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:36:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:36:11,874 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 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 14:36:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:11,978 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-02 14:36:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:36:11,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 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 21 [2021-05-02 14:36:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:11,980 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:36:11,980 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 14:36:11,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:36:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 14:36:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 14:36:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-02 14:36:11,997 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 21 [2021-05-02 14:36:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:11,997 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-02 14:36:11,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (4), 2 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 14:36:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-02 14:36:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 14:36:11,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:11,998 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:12,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:12,199 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:12,199 INFO L82 PathProgramCache]: Analyzing trace with hash 947727214, now seen corresponding path program 1 times [2021-05-02 14:36:12,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:12,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385832902] [2021-05-02 14:36:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:12,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:12,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896560189] [2021-05-02 14:36:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:12,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:36:12,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:12,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385832902] [2021-05-02 14:36:12,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896560189] [2021-05-02 14:36:12,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896560189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:36:12,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:36:12,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:36:12,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946437303] [2021-05-02 14:36:12,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:36:12,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:12,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:36:12,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:12,317 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:12,333 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-02 14:36:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:36:12,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 14:36:12,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:12,334 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:36:12,334 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:36:12,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:36:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:36:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:36:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 14:36:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 14:36:12,343 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2021-05-02 14:36:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:12,343 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 14:36:12,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 14:36:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:36:12,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:12,344 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:12,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:12,549 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:12,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1574040585, now seen corresponding path program 1 times [2021-05-02 14:36:12,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:12,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502048785] [2021-05-02 14:36:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:12,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:12,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601883851] [2021-05-02 14:36:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:12,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:36:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:12,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:12,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:12,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:12,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:12,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502048785] [2021-05-02 14:36:12,768 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:12,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601883851] [2021-05-02 14:36:12,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601883851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:12,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:12,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:36:12,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64727215] [2021-05-02 14:36:12,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:36:12,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:36:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:36:12,770 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:12,886 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-05-02 14:36:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:36:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 14:36:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:12,890 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:36:12,890 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:36:12,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:36:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:36:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 14:36:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:36:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 14:36:12,897 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2021-05-02 14:36:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:12,897 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 14:36:12,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 14:36:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:36:12,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:12,899 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 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 14:36:13,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:13,106 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2129198620, now seen corresponding path program 2 times [2021-05-02 14:36:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:13,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982077819] [2021-05-02 14:36:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:13,115 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:13,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98608658] [2021-05-02 14:36:13,115 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:13,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:36:13,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:36:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:13,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 14:36:13,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:13,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982077819] [2021-05-02 14:36:13,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:13,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98608658] [2021-05-02 14:36:13,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98608658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:13,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:13,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:36:13,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658145756] [2021-05-02 14:36:13,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:36:13,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:13,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:36:13,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:36:13,356 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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 14:36:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:13,565 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-05-02 14:36:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:36:13,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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 31 [2021-05-02 14:36:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:13,569 INFO L225 Difference]: With dead ends: 85 [2021-05-02 14:36:13,569 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:36:13,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:36:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:36:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2021-05-02 14:36:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-02 14:36:13,582 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2021-05-02 14:36:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:13,583 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-02 14:36:13,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 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 14:36:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-02 14:36:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:36:13,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:13,586 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 2, 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 14:36:13,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:36:13,797 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:13,797 INFO L82 PathProgramCache]: Analyzing trace with hash -414186241, now seen corresponding path program 3 times [2021-05-02 14:36:13,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:13,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955613123] [2021-05-02 14:36:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:13,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:13,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572388227] [2021-05-02 14:36:13,805 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:13,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 14:36:13,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:13,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 14:36:13,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:13,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:36:14,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:14,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955613123] [2021-05-02 14:36:14,056 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:14,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572388227] [2021-05-02 14:36:14,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572388227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:14,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:14,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:36:14,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418337411] [2021-05-02 14:36:14,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:36:14,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:14,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:36:14,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:36:14,057 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:14,175 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-05-02 14:36:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:36:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2021-05-02 14:36:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:14,176 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:36:14,176 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 14:36:14,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:36:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 14:36:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-05-02 14:36:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-02 14:36:14,180 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2021-05-02 14:36:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:14,180 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-02 14:36:14,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:36:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-02 14:36:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:36:14,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:14,181 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 14:36:14,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:14,385 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -758101483, now seen corresponding path program 4 times [2021-05-02 14:36:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:14,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652005982] [2021-05-02 14:36:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:14,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:14,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995130279] [2021-05-02 14:36:14,392 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 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 14:36:14,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:36:14,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:14,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:36:14,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:36:14,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652005982] [2021-05-02 14:36:14,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995130279] [2021-05-02 14:36:14,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995130279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:14,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:14,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:36:14,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466823164] [2021-05-02 14:36:14,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:36:14,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:14,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:36:14,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:36:14,749 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:14,869 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-05-02 14:36:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:36:14,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2021-05-02 14:36:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:14,870 INFO L225 Difference]: With dead ends: 77 [2021-05-02 14:36:14,870 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:36:14,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:36:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:36:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 14:36:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 14:36:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 14:36:14,874 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 37 [2021-05-02 14:36:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:14,874 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 14:36:14,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 14:36:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:36:14,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:14,875 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:15,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:15,085 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:15,085 INFO L82 PathProgramCache]: Analyzing trace with hash 826494192, now seen corresponding path program 5 times [2021-05-02 14:36:15,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:15,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441372098] [2021-05-02 14:36:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:15,092 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:15,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379424172] [2021-05-02 14:36:15,092 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 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 14:36:15,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-02 14:36:15,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 14:36:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:15,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:15,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:15,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:15,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:15,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:15,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:36:15,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:15,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441372098] [2021-05-02 14:36:15,586 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:15,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379424172] [2021-05-02 14:36:15,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379424172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:15,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:15,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:36:15,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206540728] [2021-05-02 14:36:15,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:36:15,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:36:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:36:15,587 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:15,831 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2021-05-02 14:36:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:36:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 39 [2021-05-02 14:36:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:15,833 INFO L225 Difference]: With dead ends: 107 [2021-05-02 14:36:15,833 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 14:36:15,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:36:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 14:36:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-05-02 14:36:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:36:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-05-02 14:36:15,841 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 39 [2021-05-02 14:36:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:15,841 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-05-02 14:36:15,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-05-02 14:36:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:36:15,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:15,842 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:16,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:36:16,044 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1090452213, now seen corresponding path program 6 times [2021-05-02 14:36:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:16,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847072171] [2021-05-02 14:36:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:16,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:16,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226214660] [2021-05-02 14:36:16,056 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:23,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-02 14:36:23,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:23,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:36:23,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:24,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:24,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:24,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:24,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:24,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:24,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847072171] [2021-05-02 14:36:24,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:24,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226214660] [2021-05-02 14:36:24,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226214660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:24,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:24,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:36:24,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240930859] [2021-05-02 14:36:24,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:36:24,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:24,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:36:24,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:36:24,320 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:24,624 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2021-05-02 14:36:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:36:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 14:36:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:24,625 INFO L225 Difference]: With dead ends: 101 [2021-05-02 14:36:24,625 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 14:36:24,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:36:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 14:36:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 14:36:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-05-02 14:36:24,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2021-05-02 14:36:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:24,632 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-05-02 14:36:24,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-05-02 14:36:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:36:24,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:24,634 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:24,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:24,835 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:24,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1033193911, now seen corresponding path program 1 times [2021-05-02 14:36:24,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:24,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699923756] [2021-05-02 14:36:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:24,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:24,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118573091] [2021-05-02 14:36:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:36:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:36:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:25,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:25,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:25,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:25,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:25,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:25,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:36:25,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:25,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699923756] [2021-05-02 14:36:25,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:25,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118573091] [2021-05-02 14:36:25,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118573091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:25,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:25,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:36:25,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476387235] [2021-05-02 14:36:25,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:36:25,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:25,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:36:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:36:25,295 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:25,475 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-05-02 14:36:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:36:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2021-05-02 14:36:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:25,477 INFO L225 Difference]: With dead ends: 56 [2021-05-02 14:36:25,477 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:36:25,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:36:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:36:25,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 14:36:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:36:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-05-02 14:36:25,481 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 41 [2021-05-02 14:36:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:25,482 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-05-02 14:36:25,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:36:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-05-02 14:36:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:36:25,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:36:25,482 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:36:25,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:25,686 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:36:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:36:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash 211995733, now seen corresponding path program 2 times [2021-05-02 14:36:25,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:36:25,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586390785] [2021-05-02 14:36:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:36:25,693 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:36:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705578611] [2021-05-02 14:36:25,693 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:36:25,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:36:25,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:36:25,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 14:36:25,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:36:26,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:36:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 14:36:26,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:36:26,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586390785] [2021-05-02 14:36:26,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:36:26,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705578611] [2021-05-02 14:36:26,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705578611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:36:26,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:36:26,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:36:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458658321] [2021-05-02 14:36:26,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:36:26,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:36:26,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:36:26,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:36:26,410 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:36:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:36:26,616 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-02 14:36:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:36:26,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-05-02 14:36:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:36:26,617 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:36:26,617 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:36:26,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:36:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:36:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:36:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:36:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:36:26,619 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-05-02 14:36:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:36:26,619 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:36:26,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:36:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:36:26,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:36:26,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:36:26,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:36:27,870 WARN L205 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 89 [2021-05-02 14:36:28,111 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-05-02 14:36:28,248 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-05-02 14:36:28,249 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:36:28,250 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2021-05-02 14:36:28,250 INFO L201 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-05-02 14:36:28,250 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 14:36:28,251 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 25 50) no Hoare annotation was computed. [2021-05-02 14:36:28,251 INFO L198 CegarLoopUtils]: For program point L48(line 48) no Hoare annotation was computed. [2021-05-02 14:36:28,251 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 25 50) no Hoare annotation was computed. [2021-05-02 14:36:28,251 INFO L194 CegarLoopUtils]: At program point L38-1(lines 38 47) the Hoare annotation is: (let ((.cse4 (mod main_~r~0 4294967296))) (let ((.cse0 (= main_~B~0 main_~b~0)) (.cse1 (<= .cse4 5)) (.cse3 (= main_~B~0 1)) (.cse2 (<= (mod main_~A~0 4294967296) 5)) (.cse5 (= main_~q~0 0)) (.cse6 (= main_~A~0 main_~r~0)) (.cse8 (= main_~b~0 1))) (or (and (= (+ main_~r~0 4) main_~A~0) (= main_~q~0 4) .cse0 .cse1 .cse2 .cse3) (and .cse0 (= 5 main_~q~0) .cse1 .cse2 .cse3 (= main_~A~0 (+ main_~b~0 main_~r~0 4))) (and .cse2 (= main_~q~0 1) (= main_~A~0 (+ main_~r~0 main_~b~0))) (and (<= 1 .cse4) .cse5 .cse6 .cse2) (let ((.cse9 (+ main_~r~0 main_~b~0 2))) (let ((.cse7 (mod .cse9 4294967296))) (and (<= 2 .cse7) (< .cse7 4) .cse8 (= main_~q~0 3) (= .cse9 main_~A~0)))) (and .cse5 .cse8 .cse6 (< .cse4 (mod main_~b~0 4294967296))) (let ((.cse10 (+ main_~r~0 2))) (let ((.cse11 (mod .cse10 4294967296))) (and (= main_~A~0 .cse10) .cse8 (<= 2 .cse11) (< .cse11 4) (= main_~q~0 2))))))) [2021-05-02 14:36:28,251 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 37) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse2 (= main_~A~0 main_~r~0)) (.cse0 (mod main_~r~0 4294967296)) (.cse3 (<= (mod main_~A~0 4294967296) 5)) (.cse4 (= main_~B~0 1))) (or (and (<= 1 .cse0) .cse1 .cse2 (= main_~b~0 2) .cse3 .cse4) (and .cse1 .cse2 (= main_~b~0 8) .cse3 .cse4 (<= (mod (* main_~B~0 4) 4294967296) .cse0)) (and .cse1 .cse2 (= main_~B~0 main_~b~0) .cse3 .cse4) (and .cse1 (= main_~b~0 4) .cse2 (<= (mod (* main_~B~0 2) 4294967296) .cse0) .cse3 .cse4))) [2021-05-02 14:36:28,251 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 25 50) the Hoare annotation is: true [2021-05-02 14:36:28,251 INFO L198 CegarLoopUtils]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-05-02 14:36:28,251 INFO L198 CegarLoopUtils]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2021-05-02 14:36:28,251 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse24 (+ main_~r~0 main_~b~0)) (.cse17 (mod main_~A~0 4294967296))) (let ((.cse8 (* main_~B~0 2)) (.cse10 (* main_~B~0 4)) (.cse3 (<= .cse17 5)) (.cse14 (= main_~q~0 1)) (.cse15 (= main_~A~0 .cse24)) (.cse18 (= main_~q~0 2)) (.cse5 (mod main_~r~0 4294967296))) (let ((.cse9 (< .cse5 (mod main_~b~0 4294967296))) (.cse6 (= main_~q~0 0)) (.cse7 (= main_~A~0 main_~r~0)) (.cse13 (mod .cse24 4294967296)) (.cse16 (let ((.cse20 (= main_~b~0 1))) (or (and .cse3 .cse14 .cse15) (let ((.cse21 (+ main_~r~0 main_~b~0 2))) (let ((.cse19 (mod .cse21 4294967296))) (and (<= 2 .cse19) (< .cse19 4) .cse20 (= main_~q~0 3) (= .cse21 main_~A~0)))) (let ((.cse22 (+ main_~r~0 2))) (let ((.cse23 (mod .cse22 4294967296))) (and (= main_~A~0 .cse22) .cse20 (<= 2 .cse23) (< .cse23 4) .cse18)))))) (.cse1 (= main_~B~0 main_~b~0)) (.cse2 (<= .cse5 5)) (.cse0 (= (+ main_~r~0 4) main_~A~0)) (.cse12 (mod .cse10 4294967296)) (.cse11 (mod .cse8 4294967296)) (.cse4 (= main_~B~0 1))) (or (and .cse0 (= main_~q~0 4) .cse1 .cse2 .cse3 .cse4) (and .cse1 (= 5 main_~q~0) .cse2 .cse3 .cse4 (= main_~A~0 (+ main_~b~0 main_~r~0 4))) (and (<= 1 .cse5) .cse6 .cse7 (= main_~b~0 .cse8) .cse9 .cse4) (and .cse6 (= main_~b~0 .cse10) .cse7 .cse9 (<= .cse11 .cse5) .cse4) (and .cse6 .cse7 (= main_~b~0 8) .cse3 .cse4 (<= .cse12 .cse5)) (and .cse6 .cse7 .cse1 .cse3 .cse4) (and (= main_~b~0 (div .cse12 2)) (< .cse13 .cse12) .cse14 .cse2 .cse15 .cse4) (and .cse16 (= main_~b~0 (div (mod (* main_~B~0 8) 4294967296) 2)) .cse4 (<= .cse12 .cse13)) (and .cse16 .cse1 .cse2 .cse4) (and .cse0 .cse3 (= main_~b~0 (div (mod (+ main_~A~0 (* main_~r~0 4294967295)) 4294967296) 2)) .cse4 (<= .cse12 .cse17) .cse18) (and (= (div .cse11 2) main_~b~0) .cse14 .cse3 .cse15 .cse4))))) [2021-05-02 14:36:28,251 INFO L198 CegarLoopUtils]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2021-05-02 14:36:28,251 INFO L198 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2021-05-02 14:36:28,252 INFO L198 CegarLoopUtils]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:36:28,252 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-05-02 14:36:28,252 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-05-02 14:36:28,252 INFO L198 CegarLoopUtils]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-05-02 14:36:28,252 INFO L198 CegarLoopUtils]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-05-02 14:36:28,252 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-05-02 14:36:28,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:36:28 BoogieIcfgContainer [2021-05-02 14:36:28,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:36:28,264 INFO L168 Benchmark]: Toolchain (without parser) took 18164.45 ms. Allocated memory was 186.6 MB in the beginning and 269.5 MB in the end (delta: 82.8 MB). Free memory was 150.8 MB in the beginning and 132.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 139.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:28,264 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory was 167.5 MB in the beginning and 167.4 MB in the end (delta: 140.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:36:28,264 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.23 ms. Allocated memory is still 186.6 MB. Free memory was 150.6 MB in the beginning and 168.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:28,264 INFO L168 Benchmark]: Boogie Preprocessor took 30.29 ms. Allocated memory is still 186.6 MB. Free memory was 168.5 MB in the beginning and 167.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:28,264 INFO L168 Benchmark]: RCFGBuilder took 234.59 ms. Allocated memory is still 186.6 MB. Free memory was 167.0 MB in the beginning and 151.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:28,265 INFO L168 Benchmark]: TraceAbstraction took 17686.44 ms. Allocated memory was 186.6 MB in the beginning and 269.5 MB in the end (delta: 82.8 MB). Free memory was 150.7 MB in the beginning and 132.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 139.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:36:28,265 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 186.6 MB. Free memory was 167.5 MB in the beginning and 167.4 MB in the end (delta: 140.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 207.23 ms. Allocated memory is still 186.6 MB. Free memory was 150.6 MB in the beginning and 168.5 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.29 ms. Allocated memory is still 186.6 MB. Free memory was 168.5 MB in the beginning and 167.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 234.59 ms. Allocated memory is still 186.6 MB. Free memory was 167.0 MB in the beginning and 151.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17686.44 ms. Allocated memory was 186.6 MB in the beginning and 269.5 MB in the end (delta: 82.8 MB). Free memory was 150.7 MB in the beginning and 132.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 139.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16195.9ms, OverallIterations: 12, TraceHistogramMax: 4, EmptinessCheckTime: 16.7ms, AutomataDifference: 1837.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1425.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 306 SDtfs, 251 SDslu, 1722 SDs, 0 SdLazy, 1830 SolverSat, 131 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1001.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 392 GetRequests, 257 SyntacticMatches, 7 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1635.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=9, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 92.2ms AutomataMinimizationTime, 12 MinimizatonAttempts, 58 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 47 PreInvPairs, 73 NumberOfFragments, 713 HoareAnnotationTreeSize, 47 FomulaSimplifications, 1929 FormulaSimplificationTreeSizeReduction, 116.3ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 1187 FormulaSimplificationTreeSizeReductionInter, 1301.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 86.8ms SsaConstructionTime, 8647.7ms SatisfiabilityAnalysisTime, 2715.4ms InterpolantComputationTime, 385 NumberOfCodeBlocks, 381 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 373 ConstructedInterpolants, 0 QuantifiedInterpolants, 3072 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1339 ConjunctsInSsa, 320 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 65/182 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: 34]: Loop Invariant Derived loop invariant: (((((((1 <= r % 4294967296 && q == 0) && A == r) && b == 2) && A % 4294967296 <= 5) && B == 1) || (((((q == 0 && A == r) && b == 8) && A % 4294967296 <= 5) && B == 1) && B * 4 % 4294967296 <= r % 4294967296)) || ((((q == 0 && A == r) && B == b) && A % 4294967296 <= 5) && B == 1)) || (((((q == 0 && b == 4) && A == r) && B * 2 % 4294967296 <= r % 4294967296) && A % 4294967296 <= 5) && B == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...