/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/geo3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:23:28,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:23:28,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:23:28,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:23:28,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:23:28,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:23:28,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:23:28,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:23:28,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:23:28,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:23:28,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:23:28,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:23:28,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:23:28,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:23:28,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:23:28,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:23:28,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:23:28,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:23:28,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:23:28,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:23:28,309 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 15:23:28,337 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:23:28,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:23:28,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:23:28,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:23:28,340 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:23:28,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:23:28,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:23:28,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:23:28,341 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:23:28,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:23:28,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:23:28,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:23:28,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:23:28,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:23:28,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:23:28,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:23:28,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:23:28,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:23:28,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:23:28,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:23:28,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:23:28,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:23:28,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:23:28,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:23:28,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:23:28,638 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:23:28,639 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:23:28,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-02 15:23:28,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d3d7fe2/ff84292c367f4b378683662e058d9bb1/FLAG8b327ed99 [2021-05-02 15:23:29,065 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:23:29,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-02 15:23:29,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d3d7fe2/ff84292c367f4b378683662e058d9bb1/FLAG8b327ed99 [2021-05-02 15:23:29,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d3d7fe2/ff84292c367f4b378683662e058d9bb1 [2021-05-02 15:23:29,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:23:29,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:23:29,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:29,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:23:29,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:23:29,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d9c6f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29, skipping insertion in model container [2021-05-02 15:23:29,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:23:29,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:23:29,605 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/geo3-ll_unwindbound10.c[525,538] [2021-05-02 15:23:29,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:29,617 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:23:29,656 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/geo3-ll_unwindbound10.c[525,538] [2021-05-02 15:23:29,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:29,668 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:23:29,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29 WrapperNode [2021-05-02 15:23:29,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:29,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:23:29,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:23:29,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:23:29,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (1/1) ... [2021-05-02 15:23:29,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:23:29,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:23:29,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:23:29,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:23:29,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (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 15:23:29,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:23:29,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:23:29,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:23:29,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:23:29,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:23:29,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:23:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:23:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:23:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:23:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:23:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:23:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:23:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:23:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:23:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:23:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:23:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:23:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:23:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:23:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:23:30,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:23:30,010 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:23:30,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:30 BoogieIcfgContainer [2021-05-02 15:23:30,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:23:30,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:23:30,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:23:30,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:23:30,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:23:29" (1/3) ... [2021-05-02 15:23:30,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e38a886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:30, skipping insertion in model container [2021-05-02 15:23:30,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:29" (2/3) ... [2021-05-02 15:23:30,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e38a886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:30, skipping insertion in model container [2021-05-02 15:23:30,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:30" (3/3) ... [2021-05-02 15:23:30,016 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound10.c [2021-05-02 15:23:30,020 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:23:30,022 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:23:30,034 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:23:30,049 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:23:30,050 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:23:30,050 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:23:30,050 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:23:30,050 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:23:30,050 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:23:30,050 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:23:30,050 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:23:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 15:23:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 15:23:30,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:30,063 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:30,064 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 15:23:30,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:30,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623592751] [2021-05-02 15:23:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:30,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:30,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652735676] [2021-05-02 15:23:30,129 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 15:23:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:30,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:23:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:30,241 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 15:23:30,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:30,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623592751] [2021-05-02 15:23:30,241 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:30,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652735676] [2021-05-02 15:23:30,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652735676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:30,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:30,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:23:30,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117647497] [2021-05-02 15:23:30,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:23:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:23:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:23:30,255 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 15:23:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:30,269 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 15:23:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:23:30,270 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 15:23:30,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:30,274 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:23:30,274 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 15:23:30,276 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 15:23:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 15:23:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 15:23:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 15:23:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 15:23:30,308 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 15:23:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:30,308 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 15:23:30,308 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 15:23:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 15:23:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:30,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:30,309 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:30,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:23:30,525 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 15:23:30,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:30,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235805285] [2021-05-02 15:23:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:30,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:30,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468514183] [2021-05-02 15:23:30,544 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 15:23:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:30,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:23:30,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:30,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:30,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:30,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:30,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:30,650 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 15:23:30,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:30,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235805285] [2021-05-02 15:23:30,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:30,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468514183] [2021-05-02 15:23:30,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468514183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:30,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:30,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:23:30,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868799831] [2021-05-02 15:23:30,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:23:30,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:23:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:30,653 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 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 15:23:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:30,661 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 15:23:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:23:30,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 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 12 [2021-05-02 15:23:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:30,662 INFO L225 Difference]: With dead ends: 26 [2021-05-02 15:23:30,663 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 15:23:30,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 15:23:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 15:23:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 15:23:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 15:23:30,666 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 15:23:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:30,666 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 15:23:30,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 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 15:23:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 15:23:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:30,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:30,667 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:30,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:30,885 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:30,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:30,885 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 15:23:30,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:30,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206427291] [2021-05-02 15:23:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:30,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:30,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047570430] [2021-05-02 15:23:30,898 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 15:23:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 15:23:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:31,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,047 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 15:23:31,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:31,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206427291] [2021-05-02 15:23:31,047 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:31,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047570430] [2021-05-02 15:23:31,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047570430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:31,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:31,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:23:31,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917464356] [2021-05-02 15:23:31,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:31,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:31,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:31,049 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 15:23:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:31,088 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 15:23:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:23:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2021-05-02 15:23:31,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:31,090 INFO L225 Difference]: With dead ends: 28 [2021-05-02 15:23:31,090 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:23:31,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:23:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:23:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 15:23:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 15:23:31,095 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 15:23:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:31,095 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 15:23:31,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 15:23:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 15:23:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:31,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:31,096 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:31,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:31,298 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:31,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 15:23:31,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:31,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294758135] [2021-05-02 15:23:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:31,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:31,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717969436] [2021-05-02 15:23:31,315 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 15:23:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:23:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:31,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:31,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:31,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294758135] [2021-05-02 15:23:31,539 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:31,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717969436] [2021-05-02 15:23:31,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717969436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:31,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:31,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:23:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354724245] [2021-05-02 15:23:31,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:31,541 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 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 15:23:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:31,584 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 15:23:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:23:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 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 20 [2021-05-02 15:23:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:31,585 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:23:31,585 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:23:31,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:23:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:23:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 15:23:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 15:23:31,600 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 15:23:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:31,601 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 15:23:31,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 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 15:23:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 15:23:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:31,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:31,601 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:31,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:31,817 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 15:23:31,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:31,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398477490] [2021-05-02 15:23:31,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:31,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:31,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592618161] [2021-05-02 15:23:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:23:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:31,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:23:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:31,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:31,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398477490] [2021-05-02 15:23:31,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592618161] [2021-05-02 15:23:31,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592618161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:31,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:31,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:23:31,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835494742] [2021-05-02 15:23:31,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:23:31,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:31,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:23:31,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:31,986 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 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 15:23:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:36,442 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 15:23:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:36,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 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 20 [2021-05-02 15:23:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:36,443 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:23:36,443 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:23:36,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:23:36,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:23:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 15:23:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 15:23:36,447 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2021-05-02 15:23:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:36,447 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 15:23:36,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 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 15:23:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 15:23:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 15:23:36,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:36,448 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:36,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:36,650 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -475222577, now seen corresponding path program 1 times [2021-05-02 15:23:36,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:36,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118089624] [2021-05-02 15:23:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:36,657 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:36,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693302181] [2021-05-02 15:23:36,657 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 15:23:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:36,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:23:36,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:36,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:23:36,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:36,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118089624] [2021-05-02 15:23:36,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:36,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693302181] [2021-05-02 15:23:36,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693302181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:36,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:36,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:23:36,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923203129] [2021-05-02 15:23:36,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:23:36,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:23:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:23:36,802 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 15:23:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:38,885 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-05-02 15:23:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:23:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 26 [2021-05-02 15:23:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:38,887 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:23:38,887 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:23:38,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:38,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:23:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:23:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 15:23:38,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-05-02 15:23:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:38,891 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 15:23:38,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 15:23:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 15:23:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:38,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:38,892 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:39,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:39,109 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 15:23:39,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:39,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411699781] [2021-05-02 15:23:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:39,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:39,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322554144] [2021-05-02 15:23:39,116 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 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 15:23:39,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:39,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:39,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:23:39,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:39,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:39,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:39,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411699781] [2021-05-02 15:23:39,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:39,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322554144] [2021-05-02 15:23:39,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322554144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:39,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:39,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:23:39,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389337404] [2021-05-02 15:23:39,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:23:39,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:39,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:23:39,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:39,296 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 15:23:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:39,329 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 15:23:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:23:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:39,330 INFO L225 Difference]: With dead ends: 42 [2021-05-02 15:23:39,330 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:23:39,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:23:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:23:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:23:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 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 15:23:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 15:23:39,335 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2021-05-02 15:23:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:39,335 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 15:23:39,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 15:23:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 15:23:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:39,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:39,336 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:39,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:39,551 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:39,551 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 15:23:39,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:39,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186182175] [2021-05-02 15:23:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:39,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:39,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355299070] [2021-05-02 15:23:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:39,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:39,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:23:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:43,882 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 15:23:45,916 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 15:23:45,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:23:45,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186182175] [2021-05-02 15:23:45,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:45,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355299070] [2021-05-02 15:23:45,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355299070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:45,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:45,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:23:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360669136] [2021-05-02 15:23:45,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:23:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:23:45,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:23:45,956 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 10 states, 10 states have (on average 1.7) 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 15:23:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:58,447 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-05-02 15:23:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:23:58,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) 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 28 [2021-05-02 15:23:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:58,449 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:23:58,449 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 15:23:58,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6254.1ms TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2021-05-02 15:23:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 15:23:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 15:23:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 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 15:23:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 15:23:58,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 28 [2021-05-02 15:23:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:58,455 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 15:23:58,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) 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 15:23:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 15:23:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:23:58,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:58,455 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:58,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:23:58,656 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-02 15:23:58,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:58,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218345726] [2021-05-02 15:23:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:58,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:58,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953278322] [2021-05-02 15:23:58,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:58,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:23:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:23:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:01,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:01,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:01,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:01,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:02,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:04,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:04,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:04,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:04,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:04,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:04,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:04,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:06,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:06,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:06,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:06,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:24,761 WARN L205 SmtUtils]: Spent 10.24 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:24:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:24,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:41,939 WARN L205 SmtUtils]: Spent 10.47 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:24:41,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:41,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:43,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:46,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:46,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:46,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:46,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:46,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:46,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:48,023 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 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_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 15:24:50,031 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 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_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from true [2021-05-02 15:24:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:24:50,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:50,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218345726] [2021-05-02 15:24:50,032 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:50,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953278322] [2021-05-02 15:24:50,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953278322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:50,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:50,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:24:50,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891255263] [2021-05-02 15:24:50,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:24:50,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:24:50,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=49, Unknown=8, NotChecked=14, Total=90 [2021-05-02 15:24:50,033 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 15:24:54,164 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 15:25:02,351 WARN L205 SmtUtils]: Spent 8.18 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 15:25:31,807 WARN L205 SmtUtils]: Spent 16.15 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 15:26:55,857 WARN L205 SmtUtils]: Spent 1.12 m on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 15:26:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:26:57,881 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 15:26:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:26:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 36 [2021-05-02 15:26:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:26:57,933 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:26:57,933 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 15:26:57,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 145605.2ms TimeCoverageRelationStatistics Valid=46, Invalid=126, Unknown=14, NotChecked=24, Total=210 [2021-05-02 15:26:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 15:26:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 15:26:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 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 15:26:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 15:26:57,937 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 15:26:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:26:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 15:26:57,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 15:26:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 15:26:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:26:57,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:26:57,938 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:26:58,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:26:58,144 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:26:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:26:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash 620230300, now seen corresponding path program 3 times [2021-05-02 15:26:58,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:26:58,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071369235] [2021-05-02 15:26:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:26:58,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:26:58,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313886892] [2021-05-02 15:26:58,153 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:26:58,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:26:58,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:26:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:26:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:01,140 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:27:01,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:01,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:07,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:07,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:07,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:07,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:07,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:07,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:09,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:13,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:15,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:28,532 WARN L205 SmtUtils]: Spent 10.33 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 15:27:28,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:28,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:30,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:32,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,930 WARN L205 SmtUtils]: Spent 10.33 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 15:27:45,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:45,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:47,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,228 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 15:27:54,237 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 15:27:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 0 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:27:54,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:27:54,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071369235] [2021-05-02 15:27:54,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:27:54,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313886892] [2021-05-02 15:27:54,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313886892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:27:54,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:27:54,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:27:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849713118] [2021-05-02 15:27:54,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:27:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:27:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:27:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=5, NotChecked=14, Total=90 [2021-05-02 15:27:54,239 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 15:28:00,430 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 45 DAG size of output: 6 [2021-05-02 15:28:14,960 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse1 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse3 (div .cse1 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse2 (* v_main_~z~0_BEFORE_CALL_14 .cse3)) (.cse4 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse2 (* .cse3 (- 1))) .cse4) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse2 (* (- 1) .cse3)) .cse4) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse4 0))))))))) (and (or (and (= |c___VERIFIER_assert_#in~cond| 0) .cse0) (= |c___VERIFIER_assert_#in~cond| 1)) (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) .cse0)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond))) is different from false [2021-05-02 15:28:44,791 WARN L205 SmtUtils]: Spent 26.59 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 15:28:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:47,013 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 15:28:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:28:47,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 36 [2021-05-02 15:28:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:47,014 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:28:47,014 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:28:47,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70985.8ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=8, NotChecked=42, Total=182 [2021-05-02 15:28:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:28:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:28:47,015 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 15:28:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:28:47,015 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 15:28:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:47,015 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:28:47,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 15:28:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:28:47,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:28:47,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:28:47,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:28:48,293 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-05-02 15:29:58,193 WARN L205 SmtUtils]: Spent 1.16 m on a formula simplification. DAG size of input: 92 DAG size of output: 1 [2021-05-02 15:30:39,322 WARN L205 SmtUtils]: Spent 41.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-02 15:30:40,892 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-05-02 15:30:40,894 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:30:40,895 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:30:40,895 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse1 (= (* main_~z~0 main_~a~0) main_~az~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~y~0 1) (<= ~counter~0 0) .cse1) (let ((.cse3 (= main_~z~0 0))) (let ((.cse8 (and .cse0 .cse3))) (and .cse1 (or (let ((.cse2 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (= (mod .cse2 main_~z~0) 0) (not .cse3) (let ((.cse4 (div .cse2 main_~z~0))) (let ((.cse6 (= main_~az~0 0)) (.cse5 (* main_~z~0 .cse4))) (or (and (= .cse4 (+ .cse5 main_~a~0)) .cse6) (let ((.cse7 (+ .cse5 (* .cse4 (- 1)) main_~a~0))) (and (not .cse6) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0) (= (mod .cse7 main_~az~0) 0)))))))) .cse8) (or .cse8 (= (mod main_~y~0 main_~z~0) 0))))))) [2021-05-02 15:30:40,896 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 43) the Hoare annotation is: (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) (= (* main_~z~0 main_~a~0) main_~az~0) (not (= main_~z~0 0)) (= (mod main_~y~0 main_~z~0) 0))) (not (<= |old(~counter~0)| 0)) (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0)))) [2021-05-02 15:30:40,896 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 22 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (<= ~counter~0 0)) [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point L44(line 44) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (= (* main_~z~0 main_~a~0) main_~az~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (not (<= |old(~counter~0)| 0)) (and (<= ~counter~0 1) .cse0 (= main_~y~0 1) .cse1) (let ((.cse3 (= main_~z~0 0))) (let ((.cse8 (and .cse0 .cse3))) (and .cse1 (or (let ((.cse2 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (= (mod .cse2 main_~z~0) 0) (not .cse3) (let ((.cse4 (div .cse2 main_~z~0))) (let ((.cse6 (= main_~az~0 0)) (.cse5 (* main_~z~0 .cse4))) (or (and (= .cse4 (+ .cse5 main_~a~0)) .cse6) (let ((.cse7 (+ .cse5 (* .cse4 (- 1)) main_~a~0))) (and (not .cse6) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0) (= (mod .cse7 main_~az~0) 0)))))))) .cse8) (or .cse8 (= (mod main_~y~0 main_~z~0) 0))))))) [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:30:40,896 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:30:40,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:30:40 BoogieIcfgContainer [2021-05-02 15:30:40,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:30:40,918 INFO L168 Benchmark]: Toolchain (without parser) took 431425.73 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 147.1 MB in the beginning and 192.3 MB in the end (delta: -45.2 MB). Peak memory consumption was 108.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:40,918 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 163.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:30:40,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.40 ms. Allocated memory is still 182.5 MB. Free memory was 146.8 MB in the beginning and 165.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:40,918 INFO L168 Benchmark]: Boogie Preprocessor took 16.48 ms. Allocated memory is still 182.5 MB. Free memory was 165.6 MB in the beginning and 164.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:40,918 INFO L168 Benchmark]: RCFGBuilder took 324.99 ms. Allocated memory is still 182.5 MB. Free memory was 164.0 MB in the beginning and 148.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:40,918 INFO L168 Benchmark]: TraceAbstraction took 430905.03 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 148.3 MB in the beginning and 192.3 MB in the end (delta: -44.0 MB). Peak memory consumption was 109.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:40,919 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 163.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 164.40 ms. Allocated memory is still 182.5 MB. Free memory was 146.8 MB in the beginning and 165.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.48 ms. Allocated memory is still 182.5 MB. Free memory was 165.6 MB in the beginning and 164.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 324.99 ms. Allocated memory is still 182.5 MB. Free memory was 164.0 MB in the beginning and 148.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 430905.03 ms. Allocated memory was 182.5 MB in the beginning and 219.2 MB in the end (delta: 36.7 MB). Free memory was 148.3 MB in the beginning and 192.3 MB in the end (delta: -44.0 MB). Peak memory consumption was 109.1 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 317168.9ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 9.3ms, AutomataDifference: 199878.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 113677.5ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 172 SDtfs, 76 SDslu, 599 SDs, 0 SdLazy, 306 SolverSat, 21 SolverUnsat, 26 SolverUnknown, 0 SolverNotchecked, 54188.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 222997.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=8, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.8ms AutomataMinimizationTime, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 30 NumberOfFragments, 359 HoareAnnotationTreeSize, 19 FomulaSimplifications, 285 FormulaSimplificationTreeSizeReduction, 39.6ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 1203 FormulaSimplificationTreeSizeReductionInter, 113630.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 89.1ms SsaConstructionTime, 360.7ms SatisfiabilityAnalysisTime, 114079.7ms InterpolantComputationTime, 229 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 219 ConstructedInterpolants, 6 QuantifiedInterpolants, 1766 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1345 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 97/130 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (!(\old(counter) <= 0) || (((a == x && y == 1) && counter <= 0) && z * a == az)) || ((z * a == az && ((((x + a * -1) % z == 0 && !(z == 0)) && (((x + a * -1) / z == z * ((x + a * -1) / z) + a && az == 0) || ((!(az == 0) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) / az * z == y) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) % az == 0))) || (a == x && z == 0))) && ((a == x && z == 0) || y % z == 0)) 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...