/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:01:39,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:01:39,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:01:39,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:01:39,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:01:39,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:01:39,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:01:39,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:01:39,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:01:39,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:01:39,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:01:39,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:01:39,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:01:39,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:01:39,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:01:39,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:01:39,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:01:39,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:01:39,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:01:39,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:01:39,393 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:01:39,418 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:01:39,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:01:39,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:01:39,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:01:39,421 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:01:39,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:01:39,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:01:39,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:01:39,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:01:39,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:01:39,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:01:39,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:01:39,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:01:39,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:01:39,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:01:39,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:01:39,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:01:39,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:01:39,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:01:39,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:01:39,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:01:39,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:01:39,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:01:39,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:01:39,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:01:39,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:01:39,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:01:39,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:01:39,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:01:39,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:01:39,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:01:39,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:01:39,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:01:39,695 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:01:39,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-05-02 15:01:39,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ecf915ac/18efad7ebacc4caa8300473ccdb9b469/FLAGe75b36acc [2021-05-02 15:01:40,109 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:01:40,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound2.c [2021-05-02 15:01:40,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ecf915ac/18efad7ebacc4caa8300473ccdb9b469/FLAGe75b36acc [2021-05-02 15:01:40,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ecf915ac/18efad7ebacc4caa8300473ccdb9b469 [2021-05-02 15:01:40,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:01:40,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:01:40,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:40,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:01:40,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:01:40,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fff28d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40, skipping insertion in model container [2021-05-02 15:01:40,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:01:40,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:01:40,628 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound2.c[535,548] [2021-05-02 15:01:40,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:40,652 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:01:40,666 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound2.c[535,548] [2021-05-02 15:01:40,672 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:40,684 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:01:40,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40 WrapperNode [2021-05-02 15:01:40,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:40,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:01:40,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:01:40,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:01:40,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... [2021-05-02 15:01:40,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:01:40,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:01:40,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:01:40,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:01:40,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:01:40,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:01:40,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:01:40,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:01:40,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:01:40,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:01:40,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:01:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:01:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:01:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:01:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:01:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:01:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:01:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:01:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:01:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:01:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:01:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:01:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:01:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:01:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:01:41,099 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:01:41,100 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:01:41,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:41 BoogieIcfgContainer [2021-05-02 15:01:41,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:01:41,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:01:41,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:01:41,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:01:41,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:01:40" (1/3) ... [2021-05-02 15:01:41,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba60d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:41, skipping insertion in model container [2021-05-02 15:01:41,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:40" (2/3) ... [2021-05-02 15:01:41,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba60d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:41, skipping insertion in model container [2021-05-02 15:01:41,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:41" (3/3) ... [2021-05-02 15:01:41,109 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound2.c [2021-05-02 15:01:41,113 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:01:41,115 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:01:41,126 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:01:41,150 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:01:41,151 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:01:41,151 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:01:41,151 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:01:41,151 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:01:41,151 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:01:41,151 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:01:41,151 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:01:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:01:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:01:41,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:41,168 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:41,168 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2021-05-02 15:01:41,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:41,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095710295] [2021-05-02 15:01:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:41,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:41,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178477794] [2021-05-02 15:01:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:01:41,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:01:41,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:41,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095710295] [2021-05-02 15:01:41,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:41,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178477794] [2021-05-02 15:01:41,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178477794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:41,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:41,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:01:41,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672205610] [2021-05-02 15:01:41,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:01:41,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:01:41,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:01:41,519 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:41,533 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2021-05-02 15:01:41,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:01:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:01:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:41,538 INFO L225 Difference]: With dead ends: 67 [2021-05-02 15:01:41,538 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:01:41,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:01:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:01:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:01:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:01:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 15:01:41,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-02 15:01:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:41,562 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 15:01:41,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 15:01:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:01:41,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:41,563 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:41,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:01:41,777 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:41,778 INFO L82 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2021-05-02 15:01:41,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:41,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689700014] [2021-05-02 15:01:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:41,787 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:41,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689806402] [2021-05-02 15:01:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:01:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:41,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:41,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:41,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:41,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:41,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:01:41,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:41,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689700014] [2021-05-02 15:01:41,946 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:41,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689806402] [2021-05-02 15:01:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689806402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:41,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:41,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:01:41,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470287585] [2021-05-02 15:01:41,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:01:41,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:41,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:01:41,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:01:41,949 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:41,960 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-02 15:01:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:01:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:01:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:41,961 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:01:41,961 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:01:41,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:01:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:01:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 15:01:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:01:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 15:01:41,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-02 15:01:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:41,967 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 15:01:41,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:41,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 15:01:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:01:41,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:41,967 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:42,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:42,177 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2021-05-02 15:01:42,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:42,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816930068] [2021-05-02 15:01:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:42,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:42,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389691986] [2021-05-02 15:01:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:42,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:01:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:42,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:42,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:42,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:42,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:01:42,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816930068] [2021-05-02 15:01:42,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389691986] [2021-05-02 15:01:42,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389691986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:42,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:42,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:01:42,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635377954] [2021-05-02 15:01:42,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:01:42,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:01:42,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:42,440 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:49,716 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-02 15:01:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:01:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:01:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:49,718 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:01:49,718 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:01:49,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:01:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:01:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:01:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-02 15:01:49,727 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-02 15:01:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:49,727 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-02 15:01:49,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:01:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-02 15:01:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:01:49,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:49,728 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:49,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:49,933 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2021-05-02 15:01:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:49,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889216174] [2021-05-02 15:01:49,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:49,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:49,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074223548] [2021-05-02 15:01:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:49,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:01:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:50,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:01:50,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889216174] [2021-05-02 15:01:50,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074223548] [2021-05-02 15:01:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074223548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:50,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:50,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:01:50,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697167790] [2021-05-02 15:01:50,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:01:50,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:50,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:01:50,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:50,289 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:02:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:02:08,679 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-05-02 15:02:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:02:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:02:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:02:08,681 INFO L225 Difference]: With dead ends: 63 [2021-05-02 15:02:08,681 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:02:08,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:02:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:02:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 15:02:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 38 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:02:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 15:02:08,697 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 29 [2021-05-02 15:02:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:02:08,697 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 15:02:08,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:02:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 15:02:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 15:02:08,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:02:08,698 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:02:08,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:02:08,899 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:02:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:02:08,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2021-05-02 15:02:08,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:02:08,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919664251] [2021-05-02 15:02:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:02:08,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:02:08,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261327332] [2021-05-02 15:02:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:02:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:02:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:02:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:02:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:08,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:02:09,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:02:09,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919664251] [2021-05-02 15:02:09,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:02:09,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261327332] [2021-05-02 15:02:09,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261327332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:02:09,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:02:09,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:02:09,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345943001] [2021-05-02 15:02:09,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:02:09,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:02:09,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:02:09,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:02:09,061 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:02:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:02:09,104 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2021-05-02 15:02:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:02:09,105 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 15:02:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:02:09,108 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:02:09,108 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 15:02:09,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:02:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 15:02:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-02 15:02:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 44 states have internal predecessors, (55), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:02:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2021-05-02 15:02:09,120 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 35 [2021-05-02 15:02:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:02:09,120 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2021-05-02 15:02:09,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:02:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2021-05-02 15:02:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:02:09,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:02:09,121 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:02:09,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:02:09,340 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:02:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:02:09,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1810200309, now seen corresponding path program 1 times [2021-05-02 15:02:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:02:09,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933313362] [2021-05-02 15:02:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:02:09,350 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:02:09,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682906536] [2021-05-02 15:02:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:02:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:02:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:02:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:02:09,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:02:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:02:09,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:02:09,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933313362] [2021-05-02 15:02:09,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:02:09,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682906536] [2021-05-02 15:02:09,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682906536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:02:09,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:02:09,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:02:09,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908365161] [2021-05-02 15:02:09,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:02:09,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:02:09,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:02:09,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:02:09,485 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:02:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:02:09,532 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2021-05-02 15:02:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:02:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 15:02:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:02:09,533 INFO L225 Difference]: With dead ends: 99 [2021-05-02 15:02:09,533 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:02:09,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:02:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:02:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:02:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 states have internal predecessors, (51), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:02:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-05-02 15:02:09,541 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 39 [2021-05-02 15:02:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:02:09,541 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-05-02 15:02:09,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:02:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-05-02 15:02:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:02:09,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:02:09,542 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:02:09,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:02:09,750 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:02:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:02:09,750 INFO L82 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2021-05-02 15:02:09,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:02:09,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202496713] [2021-05-02 15:02:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:02:09,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:02:09,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58989331] [2021-05-02 15:02:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:02:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:02:09,808 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:02:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:02:09,822 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:02:09,854 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:02:09,854 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:02:10,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:02:10,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:02:10 BoogieIcfgContainer [2021-05-02 15:02:10,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:02:10,093 INFO L168 Benchmark]: Toolchain (without parser) took 29568.82 ms. Allocated memory was 198.2 MB in the beginning and 274.7 MB in the end (delta: 76.5 MB). Free memory was 163.3 MB in the beginning and 168.3 MB in the end (delta: -5.1 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:02:10,093 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 198.2 MB. Free memory is still 179.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:02:10,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.46 ms. Allocated memory is still 198.2 MB. Free memory was 163.1 MB in the beginning and 152.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:02:10,093 INFO L168 Benchmark]: Boogie Preprocessor took 65.17 ms. Allocated memory is still 198.2 MB. Free memory was 152.6 MB in the beginning and 181.9 MB in the end (delta: -29.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:02:10,093 INFO L168 Benchmark]: RCFGBuilder took 349.31 ms. Allocated memory is still 198.2 MB. Free memory was 181.3 MB in the beginning and 164.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:02:10,094 INFO L168 Benchmark]: TraceAbstraction took 28990.43 ms. Allocated memory was 198.2 MB in the beginning and 274.7 MB in the end (delta: 76.5 MB). Free memory was 163.5 MB in the beginning and 168.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:02:10,094 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 198.2 MB. Free memory is still 179.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 158.46 ms. Allocated memory is still 198.2 MB. Free memory was 163.1 MB in the beginning and 152.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.17 ms. Allocated memory is still 198.2 MB. Free memory was 152.6 MB in the beginning and 181.9 MB in the end (delta: -29.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 349.31 ms. Allocated memory is still 198.2 MB. Free memory was 181.3 MB in the beginning and 164.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28990.43 ms. Allocated memory was 198.2 MB in the beginning and 274.7 MB in the end (delta: 76.5 MB). Free memory was 163.5 MB in the beginning and 168.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=11, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=5, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=5, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=5, counter=0, R=2, r=-1, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=1, counter++=0, r=-1, R=2, u=5, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=1, r=-1, R=2, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=5, counter=1, R=2, r=-1, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=5, counter=2, counter++=1, R=2, r=-1, u=5, v=1] [L39] COND TRUE counter++<2 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=2, r=-1, R=2, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=5, counter=2, r=-1, R=2, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=3, counter++=2, r=-1, R=2, u=5, v=1] [L47] COND FALSE !(counter++<2) [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=4, counter++=3, R=2, r=-1, u=5, v=1] [L34] COND FALSE !(counter++<2) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=4] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28920.2ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 10.8ms, AutomataDifference: 25815.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 229 SDtfs, 102 SDslu, 598 SDs, 0 SdLazy, 343 SolverSat, 32 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 25426.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 298.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=5, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.2ms SsaConstructionTime, 207.4ms SatisfiabilityAnalysisTime, 881.8ms InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 165 ConstructedInterpolants, 7 QuantifiedInterpolants, 629 SizeOfPredicates, 14 NumberOfNonLiveVariables, 828 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 33/41 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 incorrect! Received shutdown request...