/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/hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:48:38,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:48:38,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:48:38,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:48:39,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:48:39,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:48:39,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:48:39,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:48:39,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:48:39,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:48:39,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:48:39,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:48:39,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:48:39,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:48:39,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:48:39,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:48:39,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:48:39,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:48:39,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:48:39,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:48:39,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:48:39,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:48:39,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:48:39,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:48:39,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:48:39,056 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:48:39,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:48:39,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:48:39,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:48:39,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:48:39,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:48:39,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:48:39,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:48:39,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:48:39,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:48:39,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:48:39,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:48:39,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:48:39,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:48:39,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:48:39,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:48:39,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:48:39,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:48:39,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:48:39,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:48:39,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:48:39,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:48:39,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:48:39,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:48:39,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:48:39,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:48:39,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:48:39,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:48:39,368 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:48:39,369 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:48:39,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c [2021-05-02 13:48:39,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/141a44b30/b4c8a8b3c93e4de698c015f475741e3d/FLAG5b33cf4d4 [2021-05-02 13:48:39,898 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:48:39,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c [2021-05-02 13:48:39,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/141a44b30/b4c8a8b3c93e4de698c015f475741e3d/FLAG5b33cf4d4 [2021-05-02 13:48:40,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/141a44b30/b4c8a8b3c93e4de698c015f475741e3d [2021-05-02 13:48:40,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:48:40,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:48:40,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:48:40,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:48:40,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:48:40,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230dd98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40, skipping insertion in model container [2021-05-02 13:48:40,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:48:40,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:48:40,423 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/hard2.c[526,539] [2021-05-02 13:48:40,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:48:40,455 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:48:40,467 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/hard2.c[526,539] [2021-05-02 13:48:40,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:48:40,498 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:48:40,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40 WrapperNode [2021-05-02 13:48:40,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:48:40,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:48:40,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:48:40,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:48:40,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... [2021-05-02 13:48:40,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:48:40,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:48:40,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:48:40,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:48:40,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:48:40,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:48:40,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:48:40,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:48:40,656 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:48:40,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:48:40,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:48:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:48:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:48:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:48:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:48:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:48:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:48:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:48:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:48:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:48:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:48:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:48:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:48:40,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:48:40,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:48:40,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:48:40,968 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:48:40,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:48:40 BoogieIcfgContainer [2021-05-02 13:48:40,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:48:40,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:48:40,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:48:40,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:48:40,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:48:40" (1/3) ... [2021-05-02 13:48:40,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7869509d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:48:40, skipping insertion in model container [2021-05-02 13:48:40,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:48:40" (2/3) ... [2021-05-02 13:48:40,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7869509d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:48:40, skipping insertion in model container [2021-05-02 13:48:40,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:48:40" (3/3) ... [2021-05-02 13:48:40,976 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.c [2021-05-02 13:48:40,995 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:48:40,999 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:48:41,015 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:48:41,046 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:48:41,046 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:48:41,046 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:48:41,046 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:48:41,047 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:48:41,047 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:48:41,047 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:48:41,047 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:48:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:48:41,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:48:41,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:41,078 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:41,078 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:41,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1030421658, now seen corresponding path program 1 times [2021-05-02 13:48:41,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:41,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119388589] [2021-05-02 13:48:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:41,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:48:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:48:41,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119388589] [2021-05-02 13:48:41,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119388589] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:48:41,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:48:41,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:48:41,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514216239] [2021-05-02 13:48:41,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:48:41,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:41,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:48:41,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:48:41,462 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:48:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:41,969 INFO L93 Difference]: Finished difference Result 66 states and 111 transitions. [2021-05-02 13:48:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:48:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:48:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:41,977 INFO L225 Difference]: With dead ends: 66 [2021-05-02 13:48:41,977 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:48:41,980 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:48:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:48:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-05-02 13:48:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:48:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-05-02 13:48:42,018 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2021-05-02 13:48:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:42,018 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-05-02 13:48:42,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:48:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-05-02 13:48:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 13:48:42,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:42,019 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:42,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:48:42,020 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:42,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1237898617, now seen corresponding path program 1 times [2021-05-02 13:48:42,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:42,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829178629] [2021-05-02 13:48:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:42,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:48:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:42,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 13:48:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:48:42,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:42,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829178629] [2021-05-02 13:48:42,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829178629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:48:42,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:48:42,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:48:42,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943809479] [2021-05-02 13:48:42,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:48:42,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:42,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:48:42,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:48:42,146 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:48:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:42,466 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-05-02 13:48:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:48:42,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-05-02 13:48:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:42,468 INFO L225 Difference]: With dead ends: 41 [2021-05-02 13:48:42,468 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:48:42,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:48:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:48:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-05-02 13:48:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:48:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-02 13:48:42,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2021-05-02 13:48:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:42,478 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-02 13:48:42,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:48:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-02 13:48:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:48:42,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:42,479 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:42,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:48:42,479 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash 998817914, now seen corresponding path program 1 times [2021-05-02 13:48:42,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:42,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610934578] [2021-05-02 13:48:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:42,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:42,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131131916] [2021-05-02 13:48:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:48:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:48:42,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610934578] [2021-05-02 13:48:42,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131131916] [2021-05-02 13:48:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131131916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:42,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:42,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:48:42,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77212703] [2021-05-02 13:48:42,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:48:42,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:42,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:48:42,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:48:42,673 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:48:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:42,840 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2021-05-02 13:48:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:48:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-05-02 13:48:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:42,843 INFO L225 Difference]: With dead ends: 64 [2021-05-02 13:48:42,844 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 13:48:42,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:48:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 13:48:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 13:48:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:48:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-02 13:48:42,877 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 21 [2021-05-02 13:48:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:42,877 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-02 13:48:42,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:48:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-02 13:48:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:48:42,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:42,879 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:43,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 13:48:43,089 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1073979732, now seen corresponding path program 1 times [2021-05-02 13:48:43,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:43,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798551771] [2021-05-02 13:48:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:43,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:43,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017697797] [2021-05-02 13:48:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:48:43,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:48:43,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:43,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798551771] [2021-05-02 13:48:43,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:43,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017697797] [2021-05-02 13:48:43,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017697797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:43,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:43,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:48:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381282386] [2021-05-02 13:48:43,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:48:43,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:48:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:48:43,336 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:48:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:43,430 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-05-02 13:48:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:48:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 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 [2021-05-02 13:48:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:43,434 INFO L225 Difference]: With dead ends: 63 [2021-05-02 13:48:43,434 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:48:43,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:48:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:48:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 13:48:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:48:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-05-02 13:48:43,453 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 28 [2021-05-02 13:48:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:43,454 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-05-02 13:48:43,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:48:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-05-02 13:48:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:48:43,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:43,455 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:43,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:43,678 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1568039909, now seen corresponding path program 1 times [2021-05-02 13:48:43,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:43,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576261523] [2021-05-02 13:48:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:43,689 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:43,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202063304] [2021-05-02 13:48:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:48:43,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 13:48:43,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:43,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576261523] [2021-05-02 13:48:43,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:43,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202063304] [2021-05-02 13:48:43,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202063304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:43,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:43,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:48:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999788242] [2021-05-02 13:48:43,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:48:43,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:48:43,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:48:43,904 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 13:48:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:44,120 INFO L93 Difference]: Finished difference Result 102 states and 132 transitions. [2021-05-02 13:48:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:48:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 13:48:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:44,125 INFO L225 Difference]: With dead ends: 102 [2021-05-02 13:48:44,126 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 13:48:44,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:48:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 13:48:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 13:48:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 13:48:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-05-02 13:48:44,139 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 38 [2021-05-02 13:48:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:44,139 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-05-02 13:48:44,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 13:48:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-05-02 13:48:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 13:48:44,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:44,141 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:44,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:44,362 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1088642086, now seen corresponding path program 2 times [2021-05-02 13:48:44,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:44,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924986205] [2021-05-02 13:48:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:44,372 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:44,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116028004] [2021-05-02 13:48:44,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:44,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:48:44,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:48:44,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:48:44,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 13:48:44,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924986205] [2021-05-02 13:48:44,614 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:44,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116028004] [2021-05-02 13:48:44,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116028004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:44,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:44,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:48:44,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099450778] [2021-05-02 13:48:44,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:48:44,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:48:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:48:44,616 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 13:48:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:44,844 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2021-05-02 13:48:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:48:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 13:48:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:44,846 INFO L225 Difference]: With dead ends: 125 [2021-05-02 13:48:44,847 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 13:48:44,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:48:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 13:48:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-05-02 13:48:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 13:48:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-05-02 13:48:44,861 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 55 [2021-05-02 13:48:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:44,862 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-05-02 13:48:44,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 13:48:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-05-02 13:48:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 13:48:44,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:44,863 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:45,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:45,081 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:45,082 INFO L82 PathProgramCache]: Analyzing trace with hash -697745896, now seen corresponding path program 1 times [2021-05-02 13:48:45,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:45,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385856146] [2021-05-02 13:48:45,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:45,091 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:45,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349892792] [2021-05-02 13:48:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:45,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:48:45,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 13:48:45,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:45,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385856146] [2021-05-02 13:48:45,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:45,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349892792] [2021-05-02 13:48:45,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349892792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:45,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:45,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:48:45,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845465476] [2021-05-02 13:48:45,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:48:45,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:45,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:48:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:48:45,337 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 13:48:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:45,500 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2021-05-02 13:48:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:48:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2021-05-02 13:48:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:45,502 INFO L225 Difference]: With dead ends: 117 [2021-05-02 13:48:45,502 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 13:48:45,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:48:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 13:48:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-05-02 13:48:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 13:48:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-05-02 13:48:45,517 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 58 [2021-05-02 13:48:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:45,518 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-05-02 13:48:45,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 13:48:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-05-02 13:48:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 13:48:45,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:45,519 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:45,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 13:48:45,741 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash -833392887, now seen corresponding path program 2 times [2021-05-02 13:48:45,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:45,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517942558] [2021-05-02 13:48:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:45,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:45,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034279296] [2021-05-02 13:48:45,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:45,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:48:45,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:48:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:48:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 13:48:45,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:45,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517942558] [2021-05-02 13:48:45,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:45,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034279296] [2021-05-02 13:48:45,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034279296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:45,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:45,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:48:45,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366557241] [2021-05-02 13:48:45,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:48:45,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:45,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:48:45,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:48:45,994 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 13:48:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:46,178 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2021-05-02 13:48:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:48:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2021-05-02 13:48:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:46,181 INFO L225 Difference]: With dead ends: 140 [2021-05-02 13:48:46,182 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 13:48:46,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:48:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 13:48:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 13:48:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 74 states have internal predecessors, (80), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 13:48:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2021-05-02 13:48:46,207 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 63 [2021-05-02 13:48:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:46,207 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2021-05-02 13:48:46,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 13:48:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2021-05-02 13:48:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 13:48:46,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:46,210 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-05-02 13:48:46,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:46,425 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash -711069715, now seen corresponding path program 1 times [2021-05-02 13:48:46,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:46,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253600239] [2021-05-02 13:48:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:46,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:46,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519248999] [2021-05-02 13:48:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:48:46,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:48:46,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 13:48:46,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:46,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253600239] [2021-05-02 13:48:46,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:46,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519248999] [2021-05-02 13:48:46,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519248999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:46,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:46,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:48:46,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031730200] [2021-05-02 13:48:46,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:48:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:46,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:48:46,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:48:46,679 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 13:48:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:46,845 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2021-05-02 13:48:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:48:46,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 13:48:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:46,847 INFO L225 Difference]: With dead ends: 123 [2021-05-02 13:48:46,847 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 13:48:46,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:48:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 13:48:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 13:48:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 59 states have internal predecessors, (65), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 13:48:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2021-05-02 13:48:46,858 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 69 [2021-05-02 13:48:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:46,858 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2021-05-02 13:48:46,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 13:48:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2021-05-02 13:48:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 13:48:46,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:46,860 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:47,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:47,081 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash 611953797, now seen corresponding path program 3 times [2021-05-02 13:48:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:47,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793714739] [2021-05-02 13:48:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:47,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:47,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484021021] [2021-05-02 13:48:47,090 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:47,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:48:47,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:48:47,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:48:47,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:47,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:47,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:48:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-05-02 13:48:47,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:47,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793714739] [2021-05-02 13:48:47,404 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:47,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484021021] [2021-05-02 13:48:47,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484021021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:47,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:47,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:48:47,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371799294] [2021-05-02 13:48:47,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:48:47,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:47,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:48:47,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:48:47,406 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:48:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:47,620 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2021-05-02 13:48:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:48:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 13:48:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:47,622 INFO L225 Difference]: With dead ends: 121 [2021-05-02 13:48:47,622 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 13:48:47,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:48:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 13:48:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-02 13:48:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 67 states have internal predecessors, (74), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 13:48:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2021-05-02 13:48:47,635 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 72 [2021-05-02 13:48:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:47,636 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2021-05-02 13:48:47,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:48:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2021-05-02 13:48:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 13:48:47,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:47,641 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:47,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:48:47,845 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:47,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1680019059, now seen corresponding path program 3 times [2021-05-02 13:48:47,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:47,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349805597] [2021-05-02 13:48:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:47,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:47,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326147612] [2021-05-02 13:48:47,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:47,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:48:47,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:48:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:48:47,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:48:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 13:48:48,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:48:48,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349805597] [2021-05-02 13:48:48,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:48:48,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326147612] [2021-05-02 13:48:48,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326147612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:48:48,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:48:48,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:48:48,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183393903] [2021-05-02 13:48:48,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:48:48,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:48:48,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:48:48,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:48:48,131 INFO L87 Difference]: Start difference. First operand 108 states and 130 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 13:48:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:48:48,361 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-05-02 13:48:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:48:48,362 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 13:48:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:48:48,363 INFO L225 Difference]: With dead ends: 129 [2021-05-02 13:48:48,364 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 13:48:48,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:48:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 13:48:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 13:48:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:48:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 13:48:48,377 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 13:48:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:48:48,378 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 13:48:48,378 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 13:48:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 13:48:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 13:48:48,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:48:48,379 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:48:48,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:48,593 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:48:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:48:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1277256524, now seen corresponding path program 4 times [2021-05-02 13:48:48,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:48:48,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565479146] [2021-05-02 13:48:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:48:48,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:48:48,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88376812] [2021-05-02 13:48:48,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:48:48,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:48:48,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:48:48,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 13:48:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:49:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:03,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:03,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:03,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:03,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:03,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:11,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:11,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:11,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:16,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:16,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:30,925 WARN L205 SmtUtils]: Spent 6.10 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 13:49:31,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:49:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 50 proven. 61 refuted. 7 times theorem prover too weak. 188 trivial. 0 not checked. [2021-05-02 13:49:31,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:49:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565479146] [2021-05-02 13:49:31,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:49:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88376812] [2021-05-02 13:49:31,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88376812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:49:31,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:49:31,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:49:31,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893509850] [2021-05-02 13:49:31,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:49:31,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:49:31,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:49:31,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=107, Unknown=16, NotChecked=0, Total=156 [2021-05-02 13:49:31,027 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 13:50:04,306 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 19 [2021-05-02 13:50:24,327 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 13:50:47,059 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 13:51:07,230 WARN L205 SmtUtils]: Spent 20.15 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-02 13:51:25,509 WARN L205 SmtUtils]: Spent 12.13 s on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 13:51:37,720 WARN L205 SmtUtils]: Spent 12.19 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-02 13:51:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:40,670 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2021-05-02 13:51:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:51:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2021-05-02 13:51:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:40,672 INFO L225 Difference]: With dead ends: 177 [2021-05-02 13:51:40,672 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:51:40,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 129739.5ms TimeCoverageRelationStatistics Valid=85, Invalid=267, Unknown=28, NotChecked=0, Total=380 [2021-05-02 13:51:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:51:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:51:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:51:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:51:40,673 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-05-02 13:51:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:40,674 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:51:40,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 13:51:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:51:40,674 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:51:40,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:40,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:51:41,388 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-05-02 13:51:41,595 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-05-02 13:51:41,763 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-05-02 13:51:41,998 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-05-02 13:51:42,037 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 13:51:42,037 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 13:51:42,037 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 13:51:42,037 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:51:42,037 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:51:42,037 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:51:42,038 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L194 CegarLoopUtils]: At program point L33-2(lines 33 41) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse2 (= (mod main_~p~0 2) 0)) (.cse3 (= main_~A~0 main_~r~0)) (.cse5 (= main_~B~0 1)) (.cse4 (div main_~p~0 2))) (or (let ((.cse1 (* (div .cse4 2) main_~B~0))) (and .cse0 (= main_~d~0 (* .cse1 4)) .cse2 .cse3 (= (mod .cse4 2) 0) (<= (* 2 .cse1) main_~r~0) .cse5)) (and .cse0 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse5) (and (= main_~d~0 (* main_~B~0 2)) .cse0 .cse2 .cse3 .cse5 (= main_~d~0 (* (* .cse4 main_~B~0) 2))))) [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point L58(line 58) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 60) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 60) no Hoare annotation was computed. [2021-05-02 13:51:42,038 INFO L201 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: true [2021-05-02 13:51:42,039 INFO L201 CegarLoopUtils]: At program point L44-1(line 44) the Hoare annotation is: true [2021-05-02 13:51:42,039 INFO L198 CegarLoopUtils]: For program point L36(lines 33 41) no Hoare annotation was computed. [2021-05-02 13:51:42,039 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse2 (= (mod main_~p~0 2) 0)) (.cse3 (= main_~A~0 main_~r~0)) (.cse5 (= main_~B~0 1)) (.cse4 (div main_~p~0 2))) (or (let ((.cse1 (* (div .cse4 2) main_~B~0))) (and .cse0 (= main_~d~0 (* .cse1 4)) .cse2 .cse3 (= (mod .cse4 2) 0) (<= (* 2 .cse1) main_~r~0) .cse5)) (and .cse0 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse5) (and (= main_~d~0 (* main_~B~0 2)) .cse0 .cse2 .cse3 .cse5 (= main_~d~0 (* (* .cse4 main_~B~0) 2))))) [2021-05-02 13:51:42,039 INFO L194 CegarLoopUtils]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse2 (= (mod main_~p~0 2) 0)) (.cse3 (= main_~A~0 main_~r~0)) (.cse5 (= main_~B~0 1)) (.cse4 (div main_~p~0 2))) (or (let ((.cse1 (* (div .cse4 2) main_~B~0))) (and .cse0 (= main_~d~0 (* .cse1 4)) .cse2 .cse3 (= (mod .cse4 2) 0) (<= (* 2 .cse1) main_~r~0) .cse5)) (and .cse0 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse5) (and (= main_~d~0 (* main_~B~0 2)) .cse0 .cse2 .cse3 .cse5 (= main_~d~0 (* (* .cse4 main_~B~0) 2))))) [2021-05-02 13:51:42,039 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 60) the Hoare annotation is: true [2021-05-02 13:51:42,039 INFO L194 CegarLoopUtils]: At program point L57(line 57) the Hoare annotation is: (= (* main_~p~0 main_~B~0) main_~d~0) [2021-05-02 13:51:42,039 INFO L198 CegarLoopUtils]: For program point L51(lines 51 54) no Hoare annotation was computed. [2021-05-02 13:51:42,039 INFO L198 CegarLoopUtils]: For program point L51-2(lines 22 60) no Hoare annotation was computed. [2021-05-02 13:51:42,039 INFO L198 CegarLoopUtils]: For program point L45(lines 43 55) no Hoare annotation was computed. [2021-05-02 13:51:42,039 INFO L194 CegarLoopUtils]: At program point L43-1(lines 43 55) the Hoare annotation is: (= (* main_~p~0 main_~B~0) main_~d~0) [2021-05-02 13:51:42,040 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse2 (= (mod main_~p~0 2) 0)) (.cse3 (= main_~A~0 main_~r~0)) (.cse5 (= main_~B~0 1)) (.cse4 (div main_~p~0 2))) (or (let ((.cse1 (* (div .cse4 2) main_~B~0))) (and .cse0 (= main_~d~0 (* .cse1 4)) .cse2 .cse3 (= (mod .cse4 2) 0) (<= (* 2 .cse1) main_~r~0) .cse5)) (and .cse0 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse5) (and (= main_~d~0 (* main_~B~0 2)) .cse0 .cse2 .cse3 .cse5 (= main_~d~0 (* (* .cse4 main_~B~0) 2))))) [2021-05-02 13:51:42,040 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 13:51:42,040 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 13:51:42,040 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 13:51:42,040 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:51:42,040 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:51:42,040 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 13:51:42,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:51:42 BoogieIcfgContainer [2021-05-02 13:51:42,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:51:42,054 INFO L168 Benchmark]: Toolchain (without parser) took 181766.80 ms. Allocated memory was 185.6 MB in the beginning and 281.0 MB in the end (delta: 95.4 MB). Free memory was 148.8 MB in the beginning and 257.3 MB in the end (delta: -108.5 MB). Peak memory consumption was 144.9 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:42,054 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 185.6 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:51:42,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.37 ms. Allocated memory is still 185.6 MB. Free memory was 148.6 MB in the beginning and 138.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:42,054 INFO L168 Benchmark]: Boogie Preprocessor took 27.20 ms. Allocated memory is still 185.6 MB. Free memory was 138.8 MB in the beginning and 137.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:42,054 INFO L168 Benchmark]: RCFGBuilder took 441.58 ms. Allocated memory is still 185.6 MB. Free memory was 137.3 MB in the beginning and 154.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:42,054 INFO L168 Benchmark]: TraceAbstraction took 181082.94 ms. Allocated memory was 185.6 MB in the beginning and 281.0 MB in the end (delta: 95.4 MB). Free memory was 154.0 MB in the beginning and 257.3 MB in the end (delta: -103.3 MB). Peak memory consumption was 150.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:51:42,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 185.6 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 210.37 ms. Allocated memory is still 185.6 MB. Free memory was 148.6 MB in the beginning and 138.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.20 ms. Allocated memory is still 185.6 MB. Free memory was 138.8 MB in the beginning and 137.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 441.58 ms. Allocated memory is still 185.6 MB. Free memory was 137.3 MB in the beginning and 154.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 181082.94 ms. Allocated memory was 185.6 MB in the beginning and 281.0 MB in the end (delta: 95.4 MB). Free memory was 154.0 MB in the beginning and 257.3 MB in the end (delta: -103.3 MB). Peak memory consumption was 150.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 179831.2ms, OverallIterations: 12, TraceHistogramMax: 13, EmptinessCheckTime: 28.4ms, AutomataDifference: 132206.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1161.3ms, InitialAbstractionConstructionTime: 17.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 317 SDtfs, 239 SDslu, 1396 SDs, 0 SdLazy, 2357 SolverSat, 227 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 42637.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 599 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 130805.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=11, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 183.3ms AutomataMinimizationTime, 12 MinimizatonAttempts, 22 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 13 LocationsWithAnnotation, 104 PreInvPairs, 149 NumberOfFragments, 407 HoareAnnotationTreeSize, 104 FomulaSimplifications, 9183 FormulaSimplificationTreeSizeReduction, 274.3ms HoareSimplificationTime, 13 FomulaSimplificationsInter, 3360 FormulaSimplificationTreeSizeReductionInter, 872.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 85.6ms SsaConstructionTime, 305.5ms SatisfiabilityAnalysisTime, 44325.8ms InterpolantComputationTime, 586 NumberOfCodeBlocks, 520 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 3156 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1669 ConjunctsInSsa, 312 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 1357/1571 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((((q == 0 && d == p / 2 / 2 * B * 4) && p % 2 == 0) && A == r) && p / 2 % 2 == 0) && 2 * (p / 2 / 2 * B) <= r) && B == 1) || ((((q == 0 && A == r) && d == 1) && p == 1) && B == 1)) || (((((d == B * 2 && q == 0) && p % 2 == 0) && A == r) && B == 1) && d == p / 2 * B * 2) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...