/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/hard-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:11:40,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:11:40,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:11:40,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:11:40,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:11:40,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:11:40,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:11:40,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:11:40,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:11:40,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:11:40,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:11:40,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:11:40,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:11:40,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:11:40,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:11:40,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:11:40,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:11:40,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:11:40,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:11:40,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:11:40,301 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 [2021-05-06 03:11:40,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:11:40,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:11:40,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:11:40,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:11:40,349 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:11:40,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:11:40,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:11:40,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:11:40,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:11:40,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:11:40,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:11:40,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:11:40,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:11:40,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:11:40,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:11:40,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:11:40,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:11:40,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:11:40,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:11:40,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:11:40,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:11:40,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:11:40,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:11:40,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:11:40,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:11:40,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:11:40,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:11:40,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:11:40,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:11:40,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:11:40,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:11:40,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:11:40,662 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:11:40,663 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:11:40,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-06 03:11:40,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc025471/30cf9d17b3e347b8b5a376135b8ba428/FLAG72496b18d [2021-05-06 03:11:41,167 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:11:41,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2021-05-06 03:11:41,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc025471/30cf9d17b3e347b8b5a376135b8ba428/FLAG72496b18d [2021-05-06 03:11:41,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc025471/30cf9d17b3e347b8b5a376135b8ba428 [2021-05-06 03:11:41,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:11:41,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:11:41,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:11:41,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:11:41,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:11:41,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0df7b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41, skipping insertion in model container [2021-05-06 03:11:41,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:11:41,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:11:41,757 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/hard-ll_valuebound10.c[546,559] [2021-05-06 03:11:41,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:11:41,777 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:11:41,802 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/hard-ll_valuebound10.c[546,559] [2021-05-06 03:11:41,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:11:41,842 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:11:41,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41 WrapperNode [2021-05-06 03:11:41,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:11:41,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:11:41,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:11:41,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:11:41,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (1/1) ... [2021-05-06 03:11:41,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:11:41,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:11:41,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:11:41,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:11:41,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (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 [2021-05-06 03:11:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:11:41,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:11:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:11:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:11:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:11:41,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:11:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:11:41,957 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:11:41,958 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:11:41,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:11:41,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:11:41,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:11:41,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:11:41,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:11:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:11:41,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:11:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:11:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:11:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:11:41,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:11:42,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:11:42,266 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:11:42,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:11:42 BoogieIcfgContainer [2021-05-06 03:11:42,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:11:42,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:11:42,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:11:42,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:11:42,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:11:41" (1/3) ... [2021-05-06 03:11:42,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42322f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:11:42, skipping insertion in model container [2021-05-06 03:11:42,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:11:41" (2/3) ... [2021-05-06 03:11:42,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42322f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:11:42, skipping insertion in model container [2021-05-06 03:11:42,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:11:42" (3/3) ... [2021-05-06 03:11:42,273 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2021-05-06 03:11:42,278 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:11:42,281 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:11:42,294 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:11:42,313 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:11:42,313 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:11:42,313 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:11:42,313 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:11:42,314 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:11:42,314 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:11:42,314 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:11:42,314 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:11:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:11:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:11:42,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:42,333 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:42,333 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:11:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:42,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568463946] [2021-05-06 03:11:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:11:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:11:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:11:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:11:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:11:42,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:42,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568463946] [2021-05-06 03:11:42,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568463946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:11:42,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:11:42,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:11:42,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704881510] [2021-05-06 03:11:42,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:11:42,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:42,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:11:42,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:11:42,577 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:11:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:42,735 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:11:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:11:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:11:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:42,744 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:11:42,744 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:11:42,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:11:42,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:11:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:11:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:11:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:11:42,799 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:11:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:42,799 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:11:42,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:11:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:11:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:11:42,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:42,801 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:42,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:11:42,801 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:11:42,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:42,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655554632] [2021-05-06 03:11:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:11:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:11:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:11:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:11:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:11:42,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655554632] [2021-05-06 03:11:42,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655554632] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:11:42,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:11:42,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:11:42,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452646533] [2021-05-06 03:11:42,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:11:42,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:42,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:11:42,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:11:42,933 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:11:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:43,309 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:11:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:11:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:11:43,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:43,312 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:11:43,312 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:11:43,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:11:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:11:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:11:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:11:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:11:43,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:11:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:43,337 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:11:43,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:11:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:11:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:11:43,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:43,346 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:43,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:11:43,347 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:11:43,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:43,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376535931] [2021-05-06 03:11:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:43,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:11:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:43,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:11:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:43,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:11:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:43,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:11:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:43,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:11:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:11:43,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:43,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376535931] [2021-05-06 03:11:43,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376535931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:11:43,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:11:43,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:11:43,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982150624] [2021-05-06 03:11:43,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:11:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:43,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:11:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:11:43,481 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:11:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:43,821 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:11:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:11:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:11:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:43,823 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:11:43,823 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:11:43,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:11:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:11:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:11:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:11:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:11:43,832 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:11:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:43,832 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:11:43,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:11:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:11:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:11:43,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:43,833 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:43,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:11:43,834 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:43,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:11:43,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:43,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713375071] [2021-05-06 03:11:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:43,855 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:43,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171891996] [2021-05-06 03:11:43,855 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 [2021-05-06 03:11:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:11:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:44,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:11:44,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:44,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713375071] [2021-05-06 03:11:44,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:44,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171891996] [2021-05-06 03:11:44,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171891996] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:11:44,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:11:44,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:11:44,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435858855] [2021-05-06 03:11:44,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:11:44,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:11:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:11:44,062 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:11:44,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:44,124 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-06 03:11:44,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:11:44,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 03:11:44,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:44,126 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:11:44,126 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:11:44,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:11:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:11:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 03:11:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:11:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 03:11:44,137 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 03:11:44,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:44,138 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 03:11:44,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:11:44,138 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 03:11:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:11:44,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:44,139 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:44,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:11:44,353 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:11:44,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:44,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276532777] [2021-05-06 03:11:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:44,363 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:44,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803484778] [2021-05-06 03:11:44,364 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 [2021-05-06 03:11:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:11:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:44,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:11:44,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276532777] [2021-05-06 03:11:44,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:44,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803484778] [2021-05-06 03:11:44,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803484778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:11:44,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:11:44,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:11:44,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805711270] [2021-05-06 03:11:44,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:11:44,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:44,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:11:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:11:44,793 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:11:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:44,952 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 03:11:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:11:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:11:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:44,955 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:11:44,955 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:11:44,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:11:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:11:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:11:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:11:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:11:44,971 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 03:11:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:44,972 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:11:44,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:11:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:11:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:11:44,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:44,973 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:45,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:11:45,189 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:11:45,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:45,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815708608] [2021-05-06 03:11:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:45,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:45,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900227915] [2021-05-06 03:11:45,200 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 [2021-05-06 03:11:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 03:11:45,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:45,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:11:45,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:45,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815708608] [2021-05-06 03:11:45,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:45,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900227915] [2021-05-06 03:11:45,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900227915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:11:45,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:11:45,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:11:45,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269012551] [2021-05-06 03:11:45,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:11:45,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:11:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:11:45,546 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:11:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:45,773 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 03:11:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:11:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 03:11:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:45,775 INFO L225 Difference]: With dead ends: 91 [2021-05-06 03:11:45,775 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 03:11:45,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:11:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 03:11:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 03:11:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:11:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 03:11:45,787 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 03:11:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:45,788 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 03:11:45,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:11:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 03:11:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 03:11:45,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:45,789 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:46,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:11:46,013 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:46,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-06 03:11:46,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:46,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240179505] [2021-05-06 03:11:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:46,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:46,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847486636] [2021-05-06 03:11:46,022 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 [2021-05-06 03:11:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:11:46,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:46,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 03:11:46,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:46,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240179505] [2021-05-06 03:11:46,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:46,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847486636] [2021-05-06 03:11:46,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847486636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:11:46,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:11:46,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:11:46,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889170321] [2021-05-06 03:11:46,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:11:46,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:46,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:11:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:11:46,431 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:11:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:46,668 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-06 03:11:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:11:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 03:11:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:46,670 INFO L225 Difference]: With dead ends: 96 [2021-05-06 03:11:46,670 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 03:11:46,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:11:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 03:11:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 03:11:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:11:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 03:11:46,692 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 03:11:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:46,692 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 03:11:46,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:11:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 03:11:46,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 03:11:46,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:46,694 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:46,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:11:46,917 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-06 03:11:46,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:46,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196688931] [2021-05-06 03:11:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:46,925 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:46,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793511811] [2021-05-06 03:11:46,926 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 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 [2021-05-06 03:11:46,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:11:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:11:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 03:11:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:47,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 03:11:47,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:47,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196688931] [2021-05-06 03:11:47,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:47,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793511811] [2021-05-06 03:11:47,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793511811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:11:47,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:11:47,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:11:47,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195517856] [2021-05-06 03:11:47,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:11:47,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:47,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:11:47,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:11:47,237 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:11:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:47,464 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2021-05-06 03:11:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:11:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2021-05-06 03:11:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:47,466 INFO L225 Difference]: With dead ends: 127 [2021-05-06 03:11:47,466 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 03:11:47,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:11:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 03:11:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-06 03:11:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 03:11:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-05-06 03:11:47,492 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 72 [2021-05-06 03:11:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:47,493 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-05-06 03:11:47,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:11:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-05-06 03:11:47,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:11:47,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:47,494 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:47,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:11:47,713 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-06 03:11:47,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:47,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413722239] [2021-05-06 03:11:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:47,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:47,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574193967] [2021-05-06 03:11:47,721 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 [2021-05-06 03:11:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 03:11:47,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:47,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 03:11:48,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:48,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413722239] [2021-05-06 03:11:48,213 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:48,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574193967] [2021-05-06 03:11:48,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574193967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:11:48,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:11:48,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:11:48,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656516318] [2021-05-06 03:11:48,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:11:48,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:48,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:11:48,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:11:48,215 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:11:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:48,532 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2021-05-06 03:11:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:11:48,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 03:11:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:48,534 INFO L225 Difference]: With dead ends: 123 [2021-05-06 03:11:48,534 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 03:11:48,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:11:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 03:11:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-06 03:11:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 74 states have internal predecessors, (79), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 03:11:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-05-06 03:11:48,548 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 75 [2021-05-06 03:11:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:48,548 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-05-06 03:11:48,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:11:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-05-06 03:11:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:11:48,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:48,550 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:48,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:11:48,765 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1211630783, now seen corresponding path program 2 times [2021-05-06 03:11:48,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:48,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386664884] [2021-05-06 03:11:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:48,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:48,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141929567] [2021-05-06 03:11:48,779 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 [2021-05-06 03:11:48,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:11:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:11:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:11:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 03:11:49,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386664884] [2021-05-06 03:11:49,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141929567] [2021-05-06 03:11:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141929567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:11:49,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:11:49,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:11:49,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723473800] [2021-05-06 03:11:49,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:11:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:11:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:11:49,356 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:11:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:49,809 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-05-06 03:11:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:11:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-06 03:11:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:49,812 INFO L225 Difference]: With dead ends: 143 [2021-05-06 03:11:49,812 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:11:49,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:11:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:11:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-06 03:11:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:11:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-05-06 03:11:49,827 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 79 [2021-05-06 03:11:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:49,827 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-05-06 03:11:49,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:11:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-05-06 03:11:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:11:49,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:49,829 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:50,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:11:50,054 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-06 03:11:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:50,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904198635] [2021-05-06 03:11:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:50,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:50,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175271450] [2021-05-06 03:11:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 03:11:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:11:50,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:11:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:11:50,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:11:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 03:11:50,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:11:50,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904198635] [2021-05-06 03:11:50,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:11:50,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175271450] [2021-05-06 03:11:50,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175271450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:11:50,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:11:50,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:11:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151052096] [2021-05-06 03:11:50,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:11:50,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:11:50,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:11:50,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:11:50,284 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:11:50,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:11:50,411 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-05-06 03:11:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:11:50,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 03:11:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:11:50,415 INFO L225 Difference]: With dead ends: 160 [2021-05-06 03:11:50,416 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 03:11:50,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:11:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 03:11:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-05-06 03:11:50,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:11:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-06 03:11:50,433 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 86 [2021-05-06 03:11:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:11:50,434 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-06 03:11:50,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:11:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-06 03:11:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 03:11:50,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:11:50,435 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:11:50,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:11:50,649 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:11:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:11:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1094644914, now seen corresponding path program 3 times [2021-05-06 03:11:50,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:11:50,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082377281] [2021-05-06 03:11:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:11:50,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:11:50,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140278374] [2021-05-06 03:11:50,657 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 [2021-05-06 03:11:50,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:11:50,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:11:50,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 03:11:50,708 INFO L286 TraceCheckSpWp]: Computing forward predicates...