/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/fermat2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:13:10,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:13:10,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:13:10,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:13:10,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:13:10,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:13:10,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:13:10,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:13:10,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:13:10,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:13:10,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:13:10,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:13:10,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:13:10,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:13:10,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:13:10,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:13:10,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:13:10,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:13:10,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:13:10,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:13:10,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:13:10,431 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:13:10,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:13:10,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:13:10,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:13:10,433 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:13:10,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:13:10,433 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:13:10,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:13:10,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:13:10,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:13:10,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:13:10,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:13:10,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:13:10,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:13:10,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:13:10,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:13:10,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:13:10,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:13:10,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:13:10,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:13:10,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:13:10,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:13:10,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:13:10,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:13:10,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:13:10,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:13:10,803 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:13:10,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2021-05-02 15:13:10,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39de59e71/6866fcbbcac343a79f125cd8c20e1f7d/FLAG6403c61cc [2021-05-02 15:13:11,218 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:13:11,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2021-05-02 15:13:11,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39de59e71/6866fcbbcac343a79f125cd8c20e1f7d/FLAG6403c61cc [2021-05-02 15:13:11,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39de59e71/6866fcbbcac343a79f125cd8c20e1f7d [2021-05-02 15:13:11,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:13:11,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:13:11,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:13:11,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:13:11,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:13:11,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b43de58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11, skipping insertion in model container [2021-05-02 15:13:11,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:13:11,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:13:11,335 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/fermat2-ll_unwindbound5.c[524,537] [2021-05-02 15:13:11,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:13:11,355 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:13:11,412 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/fermat2-ll_unwindbound5.c[524,537] [2021-05-02 15:13:11,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:13:11,436 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:13:11,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11 WrapperNode [2021-05-02 15:13:11,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:13:11,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:13:11,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:13:11,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:13:11,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... [2021-05-02 15:13:11,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:13:11,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:13:11,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:13:11,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:13:11,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:13:11,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:13:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:13:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:13:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:13:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:13:11,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:13:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:13:11,556 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:13:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:13:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:13:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:13:11,557 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:13:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:13:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:13:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:13:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:13:11,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:13:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:13:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:13:11,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:13:11,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:13:11,733 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:13:11,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:13:11 BoogieIcfgContainer [2021-05-02 15:13:11,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:13:11,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:13:11,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:13:11,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:13:11,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:13:11" (1/3) ... [2021-05-02 15:13:11,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2219e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:13:11, skipping insertion in model container [2021-05-02 15:13:11,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:13:11" (2/3) ... [2021-05-02 15:13:11,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2219e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:13:11, skipping insertion in model container [2021-05-02 15:13:11,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:13:11" (3/3) ... [2021-05-02 15:13:11,739 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound5.c [2021-05-02 15:13:11,742 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:13:11,744 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:13:11,755 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:13:11,768 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:13:11,768 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:13:11,768 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:13:11,768 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:13:11,768 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:13:11,768 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:13:11,768 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:13:11,768 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:13:11,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:13:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:13:11,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:11,781 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:11,781 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 15:13:11,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:11,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265668405] [2021-05-02 15:13:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:11,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:11,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283045946] [2021-05-02 15:13:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:13:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:13:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:13:11,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:11,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265668405] [2021-05-02 15:13:11,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:11,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283045946] [2021-05-02 15:13:11,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283045946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:13:11,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:13:11,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:13:11,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376179945] [2021-05-02 15:13:12,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:13:12,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:12,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:13:12,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:13:12,010 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:13:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:12,021 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-02 15:13:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:13:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:13:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:12,026 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:13:12,026 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:13:12,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:13:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:13:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:13:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:13:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 15:13:12,049 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 15:13:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:12,049 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 15:13:12,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:13:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 15:13:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:13:12,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:12,050 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:12,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:13:12,266 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 15:13:12,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:12,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813801288] [2021-05-02 15:13:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:12,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:12,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88698182] [2021-05-02 15:13:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:13:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:13:12,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:12,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:13:12,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:12,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813801288] [2021-05-02 15:13:12,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:12,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88698182] [2021-05-02 15:13:12,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88698182] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:13:12,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:13:12,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:13:12,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639353365] [2021-05-02 15:13:12,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:13:12,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:13:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:13:12,410 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:13:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:12,419 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 15:13:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:13:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:13:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:12,420 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:13:12,420 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:13:12,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:13:12,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:13:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:13:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:13:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 15:13:12,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 15:13:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:12,425 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 15:13:12,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:13:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 15:13:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:13:12,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:12,426 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:12,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:12,644 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:12,644 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 15:13:12,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:12,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813659927] [2021-05-02 15:13:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:12,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:12,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125781178] [2021-05-02 15:13:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:13:12,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:13:12,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:12,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:13:12,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:12,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813659927] [2021-05-02 15:13:12,867 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:12,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125781178] [2021-05-02 15:13:12,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125781178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:13:12,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:13:12,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:13:12,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406194602] [2021-05-02 15:13:12,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:13:12,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:12,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:13:12,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:13:12,872 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:13:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:20,507 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 15:13:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:13:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:13:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:20,509 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:13:20,509 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:13:20,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:13:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:13:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 15:13:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:13:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 15:13:20,514 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 15:13:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:20,514 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 15:13:20,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:13:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 15:13:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:13:20,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:20,515 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 15:13:20,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:20,731 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:20,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:20,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 15:13:20,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:20,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590345581] [2021-05-02 15:13:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:20,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:20,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714400841] [2021-05-02 15:13:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:13:20,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:13:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:20,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:13:20,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:20,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590345581] [2021-05-02 15:13:20,988 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:20,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714400841] [2021-05-02 15:13:20,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714400841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:13:20,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:13:20,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:13:20,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865917081] [2021-05-02 15:13:20,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:13:20,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:13:20,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:13:20,989 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:13:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:38,248 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 15:13:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:13:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:13:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:38,250 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:13:38,250 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:13:38,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:13:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:13:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:13:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:13:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 15:13:38,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-05-02 15:13:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:38,256 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 15:13:38,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:13:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 15:13:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:13:38,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:38,257 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:38,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:38,458 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:38,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 15:13:38,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:38,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422653366] [2021-05-02 15:13:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:38,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:38,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139708209] [2021-05-02 15:13:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:13:38,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:13:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:38,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:13:38,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:38,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422653366] [2021-05-02 15:13:38,595 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:38,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139708209] [2021-05-02 15:13:38,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139708209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:13:38,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:13:38,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:13:38,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351911469] [2021-05-02 15:13:38,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:13:38,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:13:38,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:13:38,597 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:13:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:13:38,632 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-02 15:13:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:13:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:13:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:13:38,634 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:13:38,634 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:13:38,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:13:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:13:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 15:13:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:13:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-05-02 15:13:38,641 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-05-02 15:13:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:13:38,641 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-05-02 15:13:38,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:13:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-05-02 15:13:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:13:38,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:13:38,642 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:13:38,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:38,848 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:13:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:13:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1082012512, now seen corresponding path program 1 times [2021-05-02 15:13:38,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:13:38,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672745292] [2021-05-02 15:13:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:13:38,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:13:38,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000666924] [2021-05-02 15:13:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:13:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:13:38,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:13:38,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:13:38,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:38,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:39,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:42,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:42,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:42,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:42,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:42,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:13:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:13:42,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:13:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672745292] [2021-05-02 15:13:42,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:13:42,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000666924] [2021-05-02 15:13:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000666924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:13:42,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:13:42,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:13:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915556405] [2021-05-02 15:13:42,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:13:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:13:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:13:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:13:42,071 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:14:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:04,568 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-05-02 15:14:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:14:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:14:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:04,569 INFO L225 Difference]: With dead ends: 56 [2021-05-02 15:14:04,569 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 15:14:04,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:14:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 15:14:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 15:14:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:14:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-05-02 15:14:04,575 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 32 [2021-05-02 15:14:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:04,575 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-05-02 15:14:04,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:14:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-05-02 15:14:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:14:04,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:04,575 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:14:04,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:04,776 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1437947422, now seen corresponding path program 1 times [2021-05-02 15:14:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:04,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927820902] [2021-05-02 15:14:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:04,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:04,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113729191] [2021-05-02 15:14:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:04,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:14:04,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:04,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:04,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:05,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:05,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:23,712 WARN L205 SmtUtils]: Spent 16.62 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:14:41,810 WARN L205 SmtUtils]: Spent 8.17 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 15:14:41,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:41,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:14:41,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:41,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927820902] [2021-05-02 15:14:41,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113729191] [2021-05-02 15:14:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113729191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:41,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:41,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:14:41,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541489521] [2021-05-02 15:14:41,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:14:41,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:14:41,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 15:14:41,916 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:15:48,993 WARN L205 SmtUtils]: Spent 10.11 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:16:34,315 WARN L205 SmtUtils]: Spent 13.96 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 15:16:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:16:50,426 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-05-02 15:16:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:16:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:16:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:16:50,428 INFO L225 Difference]: With dead ends: 58 [2021-05-02 15:16:50,428 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:16:50,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 89427.3ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 15:16:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:16:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 15:16:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:16:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-05-02 15:16:50,435 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 32 [2021-05-02 15:16:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:16:50,435 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-05-02 15:16:50,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:16:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-05-02 15:16:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:16:50,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:16:50,436 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:16:50,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:16:50,637 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:16:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:16:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-02 15:16:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:16:50,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755116570] [2021-05-02 15:16:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:16:50,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:16:50,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478525323] [2021-05-02 15:16:50,644 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:16:50,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:16:50,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:16:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:16:50,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:16:50,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:16:50,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:16:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755116570] [2021-05-02 15:16:50,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:16:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478525323] [2021-05-02 15:16:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478525323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:16:50,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:16:50,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:16:50,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366331734] [2021-05-02 15:16:50,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:16:50,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:16:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:16:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:16:50,824 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:16:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:16:50,863 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2021-05-02 15:16:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:16:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:16:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:16:50,864 INFO L225 Difference]: With dead ends: 77 [2021-05-02 15:16:50,864 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 15:16:50,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:16:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 15:16:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 15:16:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:16:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-05-02 15:16:50,871 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 41 [2021-05-02 15:16:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:16:50,871 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-05-02 15:16:50,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:16:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-05-02 15:16:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:16:50,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:16:50,872 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:16:51,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:16:51,091 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:16:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:16:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1450530842, now seen corresponding path program 2 times [2021-05-02 15:16:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:16:51,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967185904] [2021-05-02 15:16:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:16:51,102 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:16:51,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661202858] [2021-05-02 15:16:51,102 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 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 15:16:51,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:16:51,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:16:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:16:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:16:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:51,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,255 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:16:54,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:16:54,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:16:54,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967185904] [2021-05-02 15:16:54,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:16:54,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661202858] [2021-05-02 15:16:54,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661202858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:16:54,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:16:54,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:16:54,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678761735] [2021-05-02 15:16:54,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:16:54,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:16:54,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:16:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:16:54,380 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:17:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:34,642 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-05-02 15:17:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:17:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:17:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:34,643 INFO L225 Difference]: With dead ends: 94 [2021-05-02 15:17:34,643 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 15:17:34,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3107.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:17:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 15:17:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-05-02 15:17:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:17:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-05-02 15:17:34,650 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 41 [2021-05-02 15:17:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:34,651 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-05-02 15:17:34,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:17:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-05-02 15:17:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:17:34,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:34,652 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:34,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:34,852 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:34,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1069429092, now seen corresponding path program 1 times [2021-05-02 15:17:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:34,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380885796] [2021-05-02 15:17:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:34,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:34,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964637378] [2021-05-02 15:17:34,858 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 15:17:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:17:34,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:34,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 15:17:34,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380885796] [2021-05-02 15:17:34,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:34,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964637378] [2021-05-02 15:17:34,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964637378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:34,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:34,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:17:34,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129268925] [2021-05-02 15:17:34,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:17:34,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:34,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:17:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:17:34,980 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:17:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:34,996 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-05-02 15:17:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:17:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-02 15:17:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:34,998 INFO L225 Difference]: With dead ends: 95 [2021-05-02 15:17:34,998 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:17:34,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:17:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:17:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-05-02 15:17:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:17:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-05-02 15:17:35,011 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 41 [2021-05-02 15:17:35,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:35,012 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-05-02 15:17:35,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:17:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-05-02 15:17:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:17:35,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:35,015 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:35,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:35,229 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:35,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2090497446, now seen corresponding path program 2 times [2021-05-02 15:17:35,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:35,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565377132] [2021-05-02 15:17:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:35,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:35,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995271866] [2021-05-02 15:17:35,236 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 15:17:35,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:17:35,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:17:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:17:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:35,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,653 WARN L205 SmtUtils]: Spent 8.23 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:17:45,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:45,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,811 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 15:17:49,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:49,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:50,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:50,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:50,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:50,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:50,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,371 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 15:17:59,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,535 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* c_main_~u~0 c_main_~u~0) (* 2 c_main_~v~0)) (+ (* c_main_~v~0 c_main_~v~0) (* 4 c_main_~A~0) (* 4 c_main_~r~0) (* 2 c_main_~u~0))) (= c_main_~v~0 1) (exists ((aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 Int) (aux_div_v_main_~u~0_10_32 Int) (aux_div_aux_mod_v_main_~u~0_10_32_69 Int)) (let ((.cse3 (+ c_main_~A~0 c_main_~r~0)) (.cse0 (* 2 aux_div_v_main_~u~0_10_32)) (.cse5 (* 2 aux_div_aux_mod_v_main_~u~0_10_32_69)) (.cse4 (* 2 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91)) (.cse1 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91)) (.cse2 (+ c_main_~A~0 c_main_~r~0 1))) (and (<= (+ .cse0 .cse1 c_main_~u~0) .cse2) (< .cse3 (+ .cse4 .cse1 c_main_~u~0 1)) (= (mod (+ c_main_~A~0 (* (- 1) aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91) c_main_~r~0 c_main_~u~0 1) 2) 0) (< .cse3 (+ .cse5 .cse1 c_main_~u~0 1)) (< (+ (* aux_div_v_main_~u~0_10_32 aux_div_v_main_~u~0_10_32) 1) (+ .cse0 c_main_~A~0)) (= (+ (* 2 (* c_main_~A~0 c_main_~u~0)) (* c_main_~v~0 c_main_~v~0) (* 2 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 c_main_~A~0)) (* 2 .cse1) (* 2 c_main_~u~0) (* 4 (* aux_div_aux_mod_v_main_~u~0_10_32_69 aux_div_aux_mod_v_main_~u~0_10_32_69)) (* 2 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 c_main_~r~0)) (* 2 (* c_main_~r~0 c_main_~u~0))) (+ (* 2 (* c_main_~A~0 c_main_~r~0)) (* c_main_~r~0 c_main_~r~0) (* 2 c_main_~r~0) (* 2 c_main_~v~0) (* c_main_~u~0 c_main_~u~0) (* 2 (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 c_main_~u~0)) (* 2 c_main_~A~0) (* c_main_~A~0 c_main_~A~0) (* aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91 aux_div_aux_mod_aux_mod_v_main_~u~0_10_32_69_91))) (< .cse3 (+ .cse0 .cse1 c_main_~u~0 1)) (<= (+ .cse5 .cse1 c_main_~u~0) .cse2) (<= (+ .cse4 .cse1 c_main_~u~0) .cse2))))) is different from false [2021-05-02 15:18:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:01,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2021-05-02 15:18:04,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565377132] [2021-05-02 15:18:04,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995271866] [2021-05-02 15:18:04,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995271866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:04,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:04,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:18:04,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729262153] [2021-05-02 15:18:04,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:18:04,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:04,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:18:04,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=5, NotChecked=22, Total=182 [2021-05-02 15:18:04,146 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:19:40,179 WARN L205 SmtUtils]: Spent 11.09 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:20:06,317 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 66 [2021-05-02 15:20:22,553 WARN L205 SmtUtils]: Spent 8.14 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 15:20:56,704 WARN L205 SmtUtils]: Spent 7.78 s on a formula simplification that was a NOOP. DAG size: 80 [2021-05-02 15:21:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:11,476 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-05-02 15:21:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:21:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:21:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:11,477 INFO L225 Difference]: With dead ends: 86 [2021-05-02 15:21:11,477 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 15:21:11,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 77644.4ms TimeCoverageRelationStatistics Valid=66, Invalid=344, Unknown=14, NotChecked=38, Total=462 [2021-05-02 15:21:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 15:21:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 15:21:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 64 states have internal predecessors, (70), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:21:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 15:21:11,488 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 41 [2021-05-02 15:21:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:11,508 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 15:21:11,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:21:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 15:21:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 15:21:11,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:11,509 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:11,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:21:11,727 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:11,727 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-02 15:21:11,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:11,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480062743] [2021-05-02 15:21:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:11,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:11,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067470698] [2021-05-02 15:21:11,733 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true