/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/geo3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:44:43,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:44:43,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:44:43,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:44:43,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:44:43,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:44:43,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:44:43,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:44:43,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:44:43,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:44:43,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:44:43,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:44:43,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:44:43,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:44:43,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:44:43,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:44:43,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:44:43,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:44:43,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:44:43,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:44:43,403 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 13:44:43,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:44:43,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:44:43,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:44:43,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:44:43,424 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:44:43,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:44:43,424 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:44:43,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:44:43,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:44:43,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:44:43,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:44:43,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:44:43,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:44:43,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:44:43,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:44:43,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:44:43,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:44:43,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:44:43,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:44:43,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:44:43,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:44:43,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:44:43,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:44:43,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:44:43,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:44:43,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:44:43,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:44:43,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:44:43,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:44:43,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:44:43,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:44:43,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:44:43,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:44:43,757 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:44:43,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3-ll.c [2021-05-02 13:44:43,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab3af584/774441dc771e4305a9d8636a3792428a/FLAG7e2d2c68a [2021-05-02 13:44:44,301 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:44:44,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3-ll.c [2021-05-02 13:44:44,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab3af584/774441dc771e4305a9d8636a3792428a/FLAG7e2d2c68a [2021-05-02 13:44:44,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ab3af584/774441dc771e4305a9d8636a3792428a [2021-05-02 13:44:44,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:44:44,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:44:44,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:44:44,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:44:44,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:44:44,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:44,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb91e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44, skipping insertion in model container [2021-05-02 13:44:44,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:44,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:44:44,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:44:44,937 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/geo3-ll.c[525,538] [2021-05-02 13:44:44,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:44:44,955 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:44:44,965 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/geo3-ll.c[525,538] [2021-05-02 13:44:44,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:44:44,988 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:44:44,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44 WrapperNode [2021-05-02 13:44:44,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:44:44,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:44:44,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:44:44,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:44:44,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:44,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:45,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:45,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:45,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:45,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:45,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (1/1) ... [2021-05-02 13:44:45,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:44:45,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:44:45,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:44:45,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:44:45,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (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 13:44:45,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:44:45,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:44:45,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:44:45,122 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:44:45,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:44:45,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:44:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:44:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:44:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:44:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:44:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:44:45,124 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:44:45,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:44:45,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:44:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:44:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:44:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:44:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:44:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:44:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:44:45,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:44:45,394 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:44:45,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:44:45 BoogieIcfgContainer [2021-05-02 13:44:45,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:44:45,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:44:45,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:44:45,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:44:45,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:44:44" (1/3) ... [2021-05-02 13:44:45,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a413e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:44:45, skipping insertion in model container [2021-05-02 13:44:45,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:44:44" (2/3) ... [2021-05-02 13:44:45,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a413e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:44:45, skipping insertion in model container [2021-05-02 13:44:45,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:44:45" (3/3) ... [2021-05-02 13:44:45,413 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll.c [2021-05-02 13:44:45,418 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:44:45,422 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:44:45,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:44:45,464 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:44:45,464 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:44:45,464 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:44:45,464 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:44:45,464 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:44:45,465 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:44:45,465 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:44:45,465 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:44:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:44:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:44:45,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:45,489 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:45,489 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 1 times [2021-05-02 13:44:45,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:45,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949844199] [2021-05-02 13:44:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:45,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:45,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036950519] [2021-05-02 13:44:45,603 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 13:44:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:45,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 13:44:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:44:45,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:45,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949844199] [2021-05-02 13:44:45,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:45,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036950519] [2021-05-02 13:44:45,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036950519] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:44:45,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:44:45,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 13:44:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716292826] [2021-05-02 13:44:45,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 13:44:45,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:45,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 13:44:45,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 13:44:45,816 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:45,843 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-02 13:44:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 13:44:45,844 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:44:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:45,851 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:44:45,851 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:44:45,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 13:44:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:44:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 13:44:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:44:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 13:44:45,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-05-02 13:44:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:45,886 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 13:44:45,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 13:44:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:44:45,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:45,888 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:46,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 13:44:46,105 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 1 times [2021-05-02 13:44:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:46,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752295435] [2021-05-02 13:44:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:46,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:46,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706921133] [2021-05-02 13:44:46,122 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 13:44:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:44:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:46,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:44:46,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:46,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752295435] [2021-05-02 13:44:46,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:46,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706921133] [2021-05-02 13:44:46,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706921133] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:44:46,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:44:46,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:44:46,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207791053] [2021-05-02 13:44:46,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:44:46,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:44:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:44:46,277 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:46,311 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 13:44:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:44:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:44:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:46,312 INFO L225 Difference]: With dead ends: 26 [2021-05-02 13:44:46,313 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:44:46,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:44:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:44:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:44:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:44:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 13:44:46,324 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-02 13:44:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:46,324 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 13:44:46,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:44:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 13:44:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:44:46,325 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:46,326 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:46,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:46,541 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1366100723, now seen corresponding path program 1 times [2021-05-02 13:44:46,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:46,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826600935] [2021-05-02 13:44:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:46,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:46,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513631518] [2021-05-02 13:44:46,553 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 13:44:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:44:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:44:46,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:46,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:46,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:44:46,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:46,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826600935] [2021-05-02 13:44:46,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:46,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513631518] [2021-05-02 13:44:46,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513631518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:46,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:46,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:44:46,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962360439] [2021-05-02 13:44:46,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:44:46,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:46,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:44:46,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:44:46,746 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:44:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:44:50,899 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-05-02 13:44:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:44:50,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 13:44:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:44:50,901 INFO L225 Difference]: With dead ends: 35 [2021-05-02 13:44:50,901 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:44:50,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:44:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:44:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:44:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:44:50,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-02 13:44:50,908 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-05-02 13:44:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:44:50,908 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-02 13:44:50,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:44:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-02 13:44:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:44:50,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:44:50,910 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:51,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:51,114 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:51,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash 673668341, now seen corresponding path program 2 times [2021-05-02 13:44:51,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:51,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326898481] [2021-05-02 13:44:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:51,127 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:51,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845694399] [2021-05-02 13:44:51,127 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 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 13:44:51,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:44:51,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:44:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:44:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:44:51,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:51,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:44:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:44:51,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:44:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326898481] [2021-05-02 13:44:51,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:44:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845694399] [2021-05-02 13:44:51,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845694399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:44:51,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:44:51,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:44:51,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195814387] [2021-05-02 13:44:51,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:44:51,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:44:51,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:44:51,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:44:51,473 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:45:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:08,435 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 13:45:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:45:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 13:45:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:08,437 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:45:08,437 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:45:08,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:45:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:45:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 13:45:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 25 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:45:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 13:45:08,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 25 [2021-05-02 13:45:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:08,453 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 13:45:08,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:45:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 13:45:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:45:08,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:08,455 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:08,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:08,657 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash -244910256, now seen corresponding path program 1 times [2021-05-02 13:45:08,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:08,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594673170] [2021-05-02 13:45:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:08,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:08,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205383219] [2021-05-02 13:45:08,668 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 13:45:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:45:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:08,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:08,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 13:45:08,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:08,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594673170] [2021-05-02 13:45:08,865 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:45:08,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205383219] [2021-05-02 13:45:08,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205383219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:45:08,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:45:08,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:45:08,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763469377] [2021-05-02 13:45:08,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:45:08,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:45:08,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:45:08,867 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 13:45:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:10,946 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 13:45:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:45:10,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-05-02 13:45:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:10,950 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:45:10,950 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:45:10,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:45:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:45:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 13:45:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:45:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 13:45:10,957 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-05-02 13:45:10,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:10,957 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 13:45:10,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 13:45:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 13:45:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:45:10,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:10,959 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:11,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:11,181 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:11,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:11,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1026670605, now seen corresponding path program 3 times [2021-05-02 13:45:11,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:11,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066166605] [2021-05-02 13:45:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:11,198 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:11,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693959420] [2021-05-02 13:45:11,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:11,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:45:11,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:45:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:45:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:13,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:13,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:15,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:17,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:17,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:17,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:17,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:19,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:19,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:19,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:19,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:19,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:19,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:38,630 WARN L205 SmtUtils]: Spent 14.15 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 13:45:38,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:38,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:40,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:40,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:40,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:40,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:42,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:42,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:42,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:42,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:00,225 WARN L205 SmtUtils]: Spent 12.32 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 13:46:00,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:00,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:02,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:02,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:02,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:02,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:02,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:04,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:04,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:04,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:04,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:04,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:04,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:46:06,349 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_11))) (= (+ (* v_main_~z~0_BEFORE_CALL_11 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) v_main_~z~0_BEFORE_CALL_11 v_main_~a~0_BEFORE_CALL_11) .cse0))) (not (= v_main_~z~0_BEFORE_CALL_11 0)) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_11) 0) (not (= (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11) (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8)))))) is different from false [2021-05-02 13:46:08,353 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_11))) (= (+ (* v_main_~z~0_BEFORE_CALL_11 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) v_main_~z~0_BEFORE_CALL_11 v_main_~a~0_BEFORE_CALL_11) .cse0))) (not (= v_main_~z~0_BEFORE_CALL_11 0)) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_11) 0) (not (= (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11) (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8)))))) is different from true [2021-05-02 13:46:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 13:46:08,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:46:08,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066166605] [2021-05-02 13:46:08,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:46:08,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693959420] [2021-05-02 13:46:08,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693959420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:46:08,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:46:08,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:46:08,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806924297] [2021-05-02 13:46:08,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:46:08,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:46:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:46:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=50, Unknown=7, NotChecked=14, Total=90 [2021-05-02 13:46:08,356 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:46:15,274 WARN L205 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 13:47:41,333 WARN L205 SmtUtils]: Spent 1.17 m on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 13:48:02,157 WARN L205 SmtUtils]: Spent 18.16 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 13:48:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:06,238 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-02 13:48:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:48:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-05-02 13:48:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:06,368 INFO L225 Difference]: With dead ends: 35 [2021-05-02 13:48:06,368 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:48:06,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 146582.9ms TimeCoverageRelationStatistics Valid=41, Invalid=107, Unknown=12, NotChecked=22, Total=182 [2021-05-02 13:48:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:48:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:48:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:48:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:48:06,369 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 13:48:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:06,370 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:48:06,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:48:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:48:06,370 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:48:06,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:06,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:48:08,929 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-05-02 13:48:15,077 WARN L205 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 44 DAG size of output: 1 [2021-05-02 13:48:33,445 WARN L205 SmtUtils]: Spent 18.37 s on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-05-02 13:48:36,765 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-05-02 13:48:36,767 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 13:48:36,767 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 13:48:36,767 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 13:48:36,767 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:48:36,768 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:48:36,768 INFO L198 CegarLoopUtils]: For program point L34-1(lines 33 42) no Hoare annotation was computed. [2021-05-02 13:48:36,769 INFO L194 CegarLoopUtils]: At program point L33-2(lines 33 42) the Hoare annotation is: (let ((.cse3 (= main_~a~0 main_~x~0)) (.cse4 (= (* main_~z~0 main_~a~0) main_~az~0))) (or (and (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (not .cse2) (= (mod main_~y~0 main_~z~0) 0))) (and .cse3 .cse2))) .cse4) (and .cse3 (= main_~y~0 1) .cse4))) [2021-05-02 13:48:36,769 INFO L194 CegarLoopUtils]: At program point L33-3(lines 33 42) the Hoare annotation is: (or (let ((.cse0 (* main_~z~0 main_~a~0))) (and (= .cse0 main_~az~0) (= main_~x~0 (+ .cse0 main_~a~0)) (= main_~z~0 main_~y~0))) (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0)))) [2021-05-02 13:48:36,769 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 45) the Hoare annotation is: true [2021-05-02 13:48:36,769 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 45) no Hoare annotation was computed. [2021-05-02 13:48:36,769 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 45) no Hoare annotation was computed. [2021-05-02 13:48:36,769 INFO L198 CegarLoopUtils]: For program point L43(line 43) no Hoare annotation was computed. [2021-05-02 13:48:36,769 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse3 (= main_~a~0 main_~x~0)) (.cse4 (= (* main_~z~0 main_~a~0) main_~az~0))) (or (and (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (not .cse2) (= (mod main_~y~0 main_~z~0) 0))) (and .cse3 .cse2))) .cse4) (and .cse3 (= main_~y~0 1) .cse4))) [2021-05-02 13:48:36,770 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 13:48:36,770 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 13:48:36,770 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 13:48:36,770 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:48:36,770 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:48:36,770 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 13:48:36,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:48:36 BoogieIcfgContainer [2021-05-02 13:48:36,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:48:36,783 INFO L168 Benchmark]: Toolchain (without parser) took 231983.91 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 165.9 MB in the beginning and 113.1 MB in the end (delta: 52.8 MB). Peak memory consumption was 95.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:48:36,783 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:48:36,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.43 ms. Allocated memory is still 201.3 MB. Free memory was 165.7 MB in the beginning and 185.0 MB in the end (delta: -19.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:48:36,783 INFO L168 Benchmark]: Boogie Preprocessor took 45.58 ms. Allocated memory is still 201.3 MB. Free memory was 185.0 MB in the beginning and 183.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:48:36,784 INFO L168 Benchmark]: RCFGBuilder took 358.97 ms. Allocated memory is still 201.3 MB. Free memory was 183.4 MB in the beginning and 168.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:48:36,784 INFO L168 Benchmark]: TraceAbstraction took 231386.20 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 168.2 MB in the beginning and 113.1 MB in the end (delta: 55.2 MB). Peak memory consumption was 97.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:48:36,784 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 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 188.43 ms. Allocated memory is still 201.3 MB. Free memory was 165.7 MB in the beginning and 185.0 MB in the end (delta: -19.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.58 ms. Allocated memory is still 201.3 MB. Free memory was 185.0 MB in the beginning and 183.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.97 ms. Allocated memory is still 201.3 MB. Free memory was 183.4 MB in the beginning and 168.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 231386.20 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 168.2 MB in the beginning and 113.1 MB in the end (delta: 55.2 MB). Peak memory consumption was 97.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 201110.4ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 14.7ms, AutomataDifference: 141313.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 30195.3ms, InitialAbstractionConstructionTime: 13.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 89 SDtfs, 58 SDslu, 288 SDs, 0 SdLazy, 203 SolverSat, 13 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 36443.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 146819.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 16 PreInvPairs, 27 NumberOfFragments, 175 HoareAnnotationTreeSize, 16 FomulaSimplifications, 136 FormulaSimplificationTreeSizeReduction, 50.4ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 476 FormulaSimplificationTreeSizeReductionInter, 30137.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 57.0ms SsaConstructionTime, 215.2ms SatisfiabilityAnalysisTime, 57777.3ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 122 ConstructedInterpolants, 3 QuantifiedInterpolants, 747 SizeOfPredicates, 10 NumberOfNonLiveVariables, 730 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 63/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((z * ((x + a * -1) / z) + a == az * (y / z) + (x + a * -1) / z && (x + a * -1) % z == 0) && !(z == 0)) && y % z == 0) || (a == x && z == 0)) && z * a == az) || ((a == x && y == 1) && z * a == az) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...