/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:47:05,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:47:05,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:47:05,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:47:05,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:47:05,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:47:05,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:47:05,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:47:05,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:47:05,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:47:05,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:47:05,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:47:05,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:47:05,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:47:05,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:47:05,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:47:05,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:47:05,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:47:05,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:47:05,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:47:05,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:47:05,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:47:05,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:47:05,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:47:05,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:47:05,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:47:05,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:47:05,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:47:05,455 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 [2020-10-23 18:47:05,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:47:05,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:47:05,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:47:05,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:47:05,485 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:47:05,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:47:05,486 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:47:05,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:47:05,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:47:05,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:47:05,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:47:05,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:47:05,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:47:05,487 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:47:05,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:47:05,488 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:47:05,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:47:05,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:47:05,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:47:05,489 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:47:05,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:47:05,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:47:05,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:47:05,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:47:05,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:47:05,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:47:05,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:47:05,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:47:05,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:47:05,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:47:05,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:47:05,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:47:05,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:47:05,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:47:05,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:47:05,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-10-23 18:47:06,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6327b0bf/2da9c36e905b4cf9b6ec3ce0cf0c30d9/FLAGe1c238830 [2020-10-23 18:47:06,813 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:47:06,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-10-23 18:47:06,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6327b0bf/2da9c36e905b4cf9b6ec3ce0cf0c30d9/FLAGe1c238830 [2020-10-23 18:47:07,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6327b0bf/2da9c36e905b4cf9b6ec3ce0cf0c30d9 [2020-10-23 18:47:07,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:47:07,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:47:07,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:47:07,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:47:07,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:47:07,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efdc3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07, skipping insertion in model container [2020-10-23 18:47:07,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:47:07,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:47:07,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:47:07,397 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:47:07,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:47:07,435 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:47:07,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07 WrapperNode [2020-10-23 18:47:07,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:47:07,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:47:07,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:47:07,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:47:07,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (1/1) ... [2020-10-23 18:47:07,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:47:07,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:47:07,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:47:07,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:47:07,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (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 [2020-10-23 18:47:07,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:47:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:47:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:47:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:47:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:47:07,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:47:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:47:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:47:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:47:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:47:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-10-23 18:47:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:47:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:47:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:47:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:47:07,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:47:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:47:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:47:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:47:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:47:08,088 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:47:08,089 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:47:08,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:47:08 BoogieIcfgContainer [2020-10-23 18:47:08,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:47:08,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:47:08,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:47:08,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:47:08,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:47:07" (1/3) ... [2020-10-23 18:47:08,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78bcc272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:47:08, skipping insertion in model container [2020-10-23 18:47:08,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:47:07" (2/3) ... [2020-10-23 18:47:08,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78bcc272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:47:08, skipping insertion in model container [2020-10-23 18:47:08,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:47:08" (3/3) ... [2020-10-23 18:47:08,110 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-10-23 18:47:08,124 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:47:08,130 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:47:08,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:47:08,200 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:47:08,201 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:47:08,201 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:47:08,201 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:47:08,201 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:47:08,201 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:47:08,202 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:47:08,202 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:47:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-23 18:47:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:47:08,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:47:08,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:47:08,238 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:47:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:47:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 451539001, now seen corresponding path program 1 times [2020-10-23 18:47:08,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:47:08,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589794161] [2020-10-23 18:47:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:47:08,449 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:47:08,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624723909] [2020-10-23 18:47:08,450 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 [2020-10-23 18:47:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:47:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-23 18:47:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:47:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:47:08,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589794161] [2020-10-23 18:47:08,627 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:47:08,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624723909] [2020-10-23 18:47:08,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:47:08,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-23 18:47:08,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521706006] [2020-10-23 18:47:08,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-23 18:47:08,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:47:08,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-23 18:47:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-23 18:47:08,664 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-10-23 18:47:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:47:08,694 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-10-23 18:47:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-23 18:47:08,696 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-10-23 18:47:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:47:08,706 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:47:08,706 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:47:08,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-23 18:47:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:47:08,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-23 18:47:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:47:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-23 18:47:08,757 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2020-10-23 18:47:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:47:08,758 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-23 18:47:08,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-23 18:47:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-23 18:47:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:47:08,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:47:08,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:47:08,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-23 18:47:08,975 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:47:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:47:08,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1624006843, now seen corresponding path program 1 times [2020-10-23 18:47:08,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:47:08,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366915034] [2020-10-23 18:47:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:47:08,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:47:08,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978606529] [2020-10-23 18:47:09,000 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 [2020-10-23 18:47:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:47:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:47:09,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:47:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:47:13,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366915034] [2020-10-23 18:47:13,296 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:47:13,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978606529] [2020-10-23 18:47:13,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:47:13,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:47:13,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128236234] [2020-10-23 18:47:13,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:47:13,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:47:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:47:13,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:47:13,309 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-23 18:47:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:47:15,472 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-23 18:47:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:47:15,474 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-23 18:47:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:47:15,476 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:47:15,476 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:47:15,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:47:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:47:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-23 18:47:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:47:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-23 18:47:15,488 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-23 18:47:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:47:15,490 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-23 18:47:15,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:47:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-23 18:47:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:47:15,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:47:15,492 INFO L422 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] [2020-10-23 18:47:15,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:47:15,706 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:47:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:47:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2043930870, now seen corresponding path program 1 times [2020-10-23 18:47:15,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:47:15,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576381720] [2020-10-23 18:47:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:47:15,747 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:47:15,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758164581] [2020-10-23 18:47:15,748 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 [2020-10-23 18:47:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:47:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:47:15,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:47:15,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:47:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:47:15,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576381720] [2020-10-23 18:47:15,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:47:15,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758164581] [2020-10-23 18:47:15,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:47:15,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-23 18:47:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195794914] [2020-10-23 18:47:15,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:47:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:47:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:47:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:47:15,987 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states. [2020-10-23 18:47:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:47:24,466 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-23 18:47:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:47:24,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-23 18:47:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:47:24,470 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:47:24,471 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 18:47:24,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:47:24,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 18:47:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 18:47:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 18:47:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-23 18:47:24,484 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 29 [2020-10-23 18:47:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:47:24,485 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-23 18:47:24,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:47:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-23 18:47:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:47:24,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:47:24,490 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:47:24,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:47:24,705 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:47:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:47:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1812191269, now seen corresponding path program 1 times [2020-10-23 18:47:24,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:47:24,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198644023] [2020-10-23 18:47:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:47:24,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:47:24,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347295707] [2020-10-23 18:47:24,733 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 [2020-10-23 18:47:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:47:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:47:24,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:47:27,001 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 23 [2020-10-23 18:47:29,331 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 24 [2020-10-23 18:47:29,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:47:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:47:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198644023] [2020-10-23 18:47:29,478 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:47:29,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347295707] [2020-10-23 18:47:29,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:47:29,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:47:29,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280390626] [2020-10-23 18:47:29,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:47:29,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:47:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:47:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:47:29,483 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-10-23 18:47:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:47:35,964 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-23 18:47:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:47:35,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-23 18:47:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:47:35,970 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:47:35,970 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 18:47:35,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:47:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 18:47:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-23 18:47:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:47:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-23 18:47:35,981 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2020-10-23 18:47:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:47:35,981 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-23 18:47:35,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:47:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-23 18:47:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:47:35,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:47:35,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:47:36,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:47:36,184 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:47:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:47:36,185 INFO L82 PathProgramCache]: Analyzing trace with hash -37183907, now seen corresponding path program 1 times [2020-10-23 18:47:36,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:47:36,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515748756] [2020-10-23 18:47:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:47:36,201 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:47:36,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636241693] [2020-10-23 18:47:36,202 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 [2020-10-23 18:47:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:47:36,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:47:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:47:46,691 WARN L193 SmtUtils]: Spent 8.19 s on a formula simplification that was a NOOP. DAG size: 28 [2020-10-23 18:48:03,260 WARN L193 SmtUtils]: Spent 8.41 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-23 18:48:03,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:48:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:48:03,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515748756] [2020-10-23 18:48:03,462 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:48:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636241693] [2020-10-23 18:48:03,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:48:03,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:48:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893310412] [2020-10-23 18:48:03,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:48:03,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:48:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:48:03,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=50, Unknown=5, NotChecked=0, Total=72 [2020-10-23 18:48:03,464 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 9 states. [2020-10-23 18:48:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:48:32,966 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-23 18:48:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:48:32,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-23 18:48:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:48:32,970 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:48:32,970 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:48:32,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=28, Invalid=77, Unknown=5, NotChecked=0, Total=110 [2020-10-23 18:48:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:48:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-10-23 18:48:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:48:32,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-23 18:48:32,982 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2020-10-23 18:48:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:48:32,983 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-23 18:48:32,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:48:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-23 18:48:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:48:32,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:48:32,984 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:48:33,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:48:33,186 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:48:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:48:33,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2077604465, now seen corresponding path program 2 times [2020-10-23 18:48:33,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:48:33,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142274308] [2020-10-23 18:48:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:48:33,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:48:33,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966064733] [2020-10-23 18:48:33,200 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 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 [2020-10-23 18:48:33,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:48:33,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:48:33,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 18:48:33,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:48:36,755 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-10-23 18:48:36,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:48:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-23 18:48:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142274308] [2020-10-23 18:48:39,182 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:48:39,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966064733] [2020-10-23 18:48:39,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:48:39,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-23 18:48:39,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302043680] [2020-10-23 18:48:39,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:48:39,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:48:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:48:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=85, Unknown=2, NotChecked=0, Total=110 [2020-10-23 18:48:39,185 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 11 states. [2020-10-23 18:49:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:49:02,040 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-10-23 18:49:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:49:02,056 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-23 18:49:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:49:02,058 INFO L225 Difference]: With dead ends: 63 [2020-10-23 18:49:02,058 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 18:49:02,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=34, Invalid=120, Unknown=2, NotChecked=0, Total=156 [2020-10-23 18:49:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 18:49:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-23 18:49:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 18:49:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-23 18:49:02,075 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 39 [2020-10-23 18:49:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:49:02,076 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-23 18:49:02,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:49:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-23 18:49:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:49:02,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:49:02,078 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-23 18:49:02,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:49:02,279 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:49:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:49:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -442355469, now seen corresponding path program 1 times [2020-10-23 18:49:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:49:02,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127401614] [2020-10-23 18:49:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:49:02,293 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:49:02,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93939130] [2020-10-23 18:49:02,294 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 [2020-10-23 18:49:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:49:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:49:02,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:49:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-23 18:49:02,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127401614] [2020-10-23 18:49:02,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:49:02,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93939130] [2020-10-23 18:49:02,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:49:02,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-23 18:49:02,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931504520] [2020-10-23 18:49:02,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:49:02,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:49:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:49:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:49:02,405 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 5 states. [2020-10-23 18:49:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:49:02,476 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-10-23 18:49:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:49:02,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-23 18:49:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:49:02,481 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:49:02,481 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 18:49:02,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:49:02,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 18:49:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-23 18:49:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 18:49:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-23 18:49:02,495 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 39 [2020-10-23 18:49:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:49:02,496 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-23 18:49:02,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:49:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-23 18:49:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:49:02,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:49:02,497 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:49:02,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:49:02,712 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:49:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:49:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1722219147, now seen corresponding path program 2 times [2020-10-23 18:49:02,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:49:02,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527916106] [2020-10-23 18:49:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:49:02,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:49:02,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349852101] [2020-10-23 18:49:02,742 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 [2020-10-23 18:49:02,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:49:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:49:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:49:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:49:05,207 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 23 [2020-10-23 18:49:07,317 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((main_~R~0 Int)) (let ((.cse0 (* main_~R~0 main_~R~0))) (and (<= (+ c_main_~r~0 c_main_~A~0 2) (+ .cse0 c_main_~u~0)) (= (+ (* c_main_~v~0 c_main_~v~0) (* 2 (* c_main_~r~0 main_~R~0 main_~R~0)) (* 2 c_main_~r~0) (* 2 .cse0) (* 2 (* c_main_~A~0 main_~R~0 main_~R~0)) (* 2 c_main_~A~0)) (+ (* c_main_~r~0 c_main_~r~0) (* c_main_~A~0 c_main_~A~0) (* 2 c_main_~v~0) (* main_~R~0 main_~R~0 main_~R~0 main_~R~0) (* 2 (* c_main_~A~0 c_main_~r~0))))))) (= c_main_~v~0 1)) is different from false [2020-10-23 18:49:18,092 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-23 18:49:39,577 WARN L193 SmtUtils]: Spent 8.53 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-23 18:49:39,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:49:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 2 refuted. 4 times theorem prover too weak. 8 trivial. 4 not checked. [2020-10-23 18:49:43,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527916106] [2020-10-23 18:49:43,719 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:49:43,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349852101] [2020-10-23 18:49:43,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:49:43,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-23 18:49:43,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112932312] [2020-10-23 18:49:43,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:49:43,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:49:43,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:49:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=63, Unknown=10, NotChecked=16, Total=110 [2020-10-23 18:49:43,725 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 11 states. [2020-10-23 18:50:51,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:50:51,277 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-23 18:50:51,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:50:51,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-23 18:50:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:50:51,282 INFO L225 Difference]: With dead ends: 71 [2020-10-23 18:50:51,282 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:50:51,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=32, Invalid=94, Unknown=10, NotChecked=20, Total=156 [2020-10-23 18:50:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:50:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-23 18:50:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 18:50:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-23 18:50:51,298 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 39 [2020-10-23 18:50:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:50:51,298 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-23 18:50:51,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:50:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-23 18:50:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 18:50:51,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:50:51,303 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:50:51,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-10-23 18:50:51,517 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:50:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:50:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1645631239, now seen corresponding path program 3 times [2020-10-23 18:50:51,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:50:51,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776741629] [2020-10-23 18:50:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:50:51,538 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:50:51,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447433980] [2020-10-23 18:50:51,539 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 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 [2020-10-23 18:50:51,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 18:50:51,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:50:51,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:50:51,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:50:51,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:50:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 18:50:51,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776741629] [2020-10-23 18:50:51,928 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:50:51,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447433980] [2020-10-23 18:50:51,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:50:51,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:50:51,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864109809] [2020-10-23 18:50:51,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:50:51,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:50:51,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:50:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:50:51,931 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 7 states. [2020-10-23 18:50:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:50:56,477 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-10-23 18:50:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:50:56,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-23 18:50:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:50:56,479 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:50:56,479 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 18:50:56,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:50:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 18:50:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-23 18:50:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-23 18:50:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-23 18:50:56,501 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 47 [2020-10-23 18:50:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:50:56,501 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-23 18:50:56,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:50:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-23 18:50:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 18:50:56,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:50:56,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:50:56,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:50:56,708 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:50:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:50:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash -874328695, now seen corresponding path program 2 times [2020-10-23 18:50:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:50:56,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733517554] [2020-10-23 18:50:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:50:56,723 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:50:56,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128544733] [2020-10-23 18:50:56,723 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 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 [2020-10-23 18:50:56,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:50:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:50:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:50:56,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:51:07,784 WARN L193 SmtUtils]: Spent 8.57 s on a formula simplification that was a NOOP. DAG size: 28 [2020-10-23 18:51:17,990 WARN L193 SmtUtils]: Spent 8.93 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-23 18:51:32,236 WARN L193 SmtUtils]: Spent 5.06 s on a formula simplification that was a NOOP. DAG size: 19 [2020-10-23 18:51:43,974 WARN L193 SmtUtils]: Spent 6.66 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-23 18:52:03,303 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-23 18:52:03,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:52:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 17 refuted. 6 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 18:52:07,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733517554] [2020-10-23 18:52:07,733 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:52:07,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128544733] [2020-10-23 18:52:07,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:52:07,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-23 18:52:07,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202974355] [2020-10-23 18:52:07,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:52:07,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:52:07,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:52:07,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=94, Unknown=12, NotChecked=0, Total=132 [2020-10-23 18:52:07,737 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 12 states. [2020-10-23 18:52:47,344 WARN L193 SmtUtils]: Spent 10.24 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-23 18:54:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:54:02,621 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-10-23 18:54:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:54:02,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-23 18:54:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:54:02,657 INFO L225 Difference]: With dead ends: 95 [2020-10-23 18:54:02,657 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 18:54:02,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=42, Invalid=154, Unknown=14, NotChecked=0, Total=210 [2020-10-23 18:54:02,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 18:54:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-23 18:54:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 18:54:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2020-10-23 18:54:02,675 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 47 [2020-10-23 18:54:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:54:02,676 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2020-10-23 18:54:02,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:54:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2020-10-23 18:54:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 18:54:02,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:54:02,677 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:54:02,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:54:02,879 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:54:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:54:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash 335336589, now seen corresponding path program 3 times [2020-10-23 18:54:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:54:02,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8774471] [2020-10-23 18:54:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:54:02,895 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:54:02,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577839924] [2020-10-23 18:54:02,896 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 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 [2020-10-23 18:54:02,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 18:54:02,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:54:02,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:54:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:54:03,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:54:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 18:54:03,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8774471] [2020-10-23 18:54:03,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:54:03,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577839924] [2020-10-23 18:54:03,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:54:03,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:54:03,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571973594] [2020-10-23 18:54:03,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:54:03,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:54:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:54:03,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:54:03,301 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 7 states. [2020-10-23 18:54:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:54:07,716 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-10-23 18:54:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:54:07,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-23 18:54:07,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:54:07,719 INFO L225 Difference]: With dead ends: 90 [2020-10-23 18:54:07,719 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:54:07,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:54:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:54:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:54:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:54:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:54:07,724 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2020-10-23 18:54:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:54:07,724 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:54:07,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:54:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:54:07,725 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:54:07,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 18:54:07,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:54:32,301 WARN L193 SmtUtils]: Spent 24.17 s on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-23 18:54:55,955 WARN L193 SmtUtils]: Spent 23.65 s on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-23 18:54:56,105 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-10-23 18:54:56,111 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2020-10-23 18:54:56,111 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 5) the Hoare annotation is: true [2020-10-23 18:54:56,112 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2020-10-23 18:54:56,112 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-23 18:54:56,112 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:54:56,112 INFO L277 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:54:56,112 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:54:56,112 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:54:56,112 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:54:56,112 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:54:56,112 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:54:56,112 INFO L277 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2020-10-23 18:54:56,113 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-23 18:54:56,113 INFO L274 CegarLoopResult]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2020-10-23 18:54:56,113 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2020-10-23 18:54:56,113 INFO L270 CegarLoopResult]: At program point L33-2(lines 33 44) the Hoare annotation is: (let ((.cse3 (+ (* main_~u~0 main_~u~0) (* 2 main_~v~0))) (.cse0 (* main_~v~0 main_~v~0)) (.cse1 (* 2 main_~u~0)) (.cse2 (* 4 main_~A~0))) (and (= (+ .cse0 (* 4 main_~r~0) .cse1 .cse2) .cse3) (= .cse3 (+ .cse0 .cse1 .cse2)))) [2020-10-23 18:54:56,113 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-10-23 18:54:56,113 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-23 18:54:56,113 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 19 49) no Hoare annotation was computed. [2020-10-23 18:54:56,114 INFO L277 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: true [2020-10-23 18:54:56,114 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 19 49) no Hoare annotation was computed. [2020-10-23 18:54:56,114 INFO L270 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (or (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (and (= (+ main_~A~0 main_~r~0) (let ((.cse0 (div (+ main_~u~0 (- 1)) 2))) (* .cse0 .cse0))) (= main_~v~0 1) (= (mod (+ main_~u~0 1) 2) 0))) [2020-10-23 18:54:56,114 INFO L274 CegarLoopResult]: For program point L34-1(lines 33 44) no Hoare annotation was computed. [2020-10-23 18:54:56,114 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 19 49) the Hoare annotation is: true [2020-10-23 18:54:56,114 INFO L274 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-10-23 18:54:56,114 INFO L274 CegarLoopResult]: For program point L37(lines 37 43) no Hoare annotation was computed. [2020-10-23 18:54:56,114 INFO L270 CegarLoopResult]: At program point L37-2(lines 33 44) the Hoare annotation is: (or (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (and (= (+ main_~A~0 main_~r~0) (let ((.cse0 (div (+ main_~u~0 (- 1)) 2))) (* .cse0 .cse0))) (= main_~v~0 1) (= (mod (+ main_~u~0 1) 2) 0))) [2020-10-23 18:54:56,115 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2020-10-23 18:54:56,115 INFO L270 CegarLoopResult]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-23 18:54:56,115 INFO L274 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2020-10-23 18:54:56,115 INFO L274 CegarLoopResult]: For program point L12-1(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:54:56,115 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:54:56,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:54:56 BoogieIcfgContainer [2020-10-23 18:54:56,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:54:56,141 INFO L168 Benchmark]: Toolchain (without parser) took 468987.83 ms. Allocated memory is still 160.4 MB. Free memory was 137.1 MB in the beginning and 94.2 MB in the end (delta: 42.9 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:54:56,141 INFO L168 Benchmark]: CDTParser took 1.52 ms. Allocated memory is still 125.8 MB. Free memory is still 93.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:54:56,142 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.10 ms. Allocated memory is still 160.4 MB. Free memory was 136.5 MB in the beginning and 126.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:54:56,143 INFO L168 Benchmark]: Boogie Preprocessor took 40.08 ms. Allocated memory is still 160.4 MB. Free memory was 126.8 MB in the beginning and 125.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:54:56,144 INFO L168 Benchmark]: RCFGBuilder took 613.80 ms. Allocated memory is still 160.4 MB. Free memory was 125.2 MB in the beginning and 143.6 MB in the end (delta: -18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:54:56,145 INFO L168 Benchmark]: TraceAbstraction took 468037.40 ms. Allocated memory is still 160.4 MB. Free memory was 143.1 MB in the beginning and 94.2 MB in the end (delta: 48.9 MB). Peak memory consumption was 48.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:54:56,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.52 ms. Allocated memory is still 125.8 MB. Free memory is still 93.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.10 ms. Allocated memory is still 160.4 MB. Free memory was 136.5 MB in the beginning and 126.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.08 ms. Allocated memory is still 160.4 MB. Free memory was 126.8 MB in the beginning and 125.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 613.80 ms. Allocated memory is still 160.4 MB. Free memory was 125.2 MB in the beginning and 143.6 MB in the end (delta: -18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 468037.40 ms. Allocated memory is still 160.4 MB. Free memory was 143.1 MB in the beginning and 94.2 MB in the end (delta: 48.9 MB). Peak memory consumption was 48.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: u * u + v * 2 == v * v + A * 4 + r * 4 + u * 2 || ((A + r == (u + -1) / 2 * ((u + -1) / 2) && v == 1) && (u + 1) % 2 == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 419.7s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 261.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 48.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 269 SDtfs, 96 SDslu, 1064 SDs, 0 SdLazy, 648 SolverSat, 21 SolverUnsat, 106 SolverUnknown, 0 SolverNotchecked, 235.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 404 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 164.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 19 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 55 PreInvPairs, 79 NumberOfFragments, 149 HoareAnnotationTreeSize, 55 FomulaSimplifications, 1858 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 13 FomulaSimplificationsInter, 22 FormulaSimplificationTreeSizeReductionInter, 47.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 154.5s InterpolantComputationTime, 395 NumberOfCodeBlocks, 363 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 384 ConstructedInterpolants, 16 QuantifiedInterpolants, 111962 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1440 ConjunctsInSsa, 157 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 154/210 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...