/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:10:45,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:10:45,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:10:45,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:10:45,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:10:45,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:10:45,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:10:45,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:10:45,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:10:45,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:10:45,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:10:45,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:10:45,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:10:45,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:10:45,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:10:45,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:10:45,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:10:45,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:10:45,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:10:45,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:10:45,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 05:10:45,996 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:10:45,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:10:45,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:10:45,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:10:45,998 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:10:45,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:10:45,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:10:45,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:10:45,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:10:45,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:10:46,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:10:46,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:10:46,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:10:46,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:10:46,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:10:46,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:10:46,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:10:46,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:10:46,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:10:46,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:10:46,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:10:46,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:10:46,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:10:46,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:10:46,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:10:46,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:10:46,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:10:46,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:10:46,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:10:46,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:10:46,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:10:46,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:10:46,308 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:10:46,309 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:10:46,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2021-05-06 05:10:46,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7956538d3/41419533be3844a89c5de004b6a83ed8/FLAG3c5f87e29 [2021-05-06 05:10:46,699 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:10:46,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2021-05-06 05:10:46,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7956538d3/41419533be3844a89c5de004b6a83ed8/FLAG3c5f87e29 [2021-05-06 05:10:47,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7956538d3/41419533be3844a89c5de004b6a83ed8 [2021-05-06 05:10:47,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:10:47,116 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:10:47,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:10:47,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:10:47,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:10:47,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3630e147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47, skipping insertion in model container [2021-05-06 05:10:47,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:10:47,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:10:47,233 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c[520,533] [2021-05-06 05:10:47,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:10:47,251 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:10:47,267 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c[520,533] [2021-05-06 05:10:47,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:10:47,307 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:10:47,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47 WrapperNode [2021-05-06 05:10:47,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:10:47,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:10:47,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:10:47,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:10:47,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... [2021-05-06 05:10:47,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:10:47,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:10:47,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:10:47,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:10:47,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:10:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:10:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:10:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:10:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:10:47,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:10:47,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:10:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:10:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:10:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:10:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:10:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:10:47,392 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:10:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:10:47,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:10:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:10:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:10:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:10:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:10:47,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:10:47,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:10:47,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:10:47,661 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:10:47,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:10:47 BoogieIcfgContainer [2021-05-06 05:10:47,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:10:47,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:10:47,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:10:47,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:10:47,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:10:47" (1/3) ... [2021-05-06 05:10:47,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c21d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:10:47, skipping insertion in model container [2021-05-06 05:10:47,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:47" (2/3) ... [2021-05-06 05:10:47,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c21d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:10:47, skipping insertion in model container [2021-05-06 05:10:47,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:10:47" (3/3) ... [2021-05-06 05:10:47,667 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound20.c [2021-05-06 05:10:47,671 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:10:47,673 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:10:47,685 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:10:47,708 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:10:47,708 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:10:47,708 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:10:47,709 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:10:47,709 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:10:47,709 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:10:47,709 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:10:47,709 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:10:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:10:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 05:10:47,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:47,722 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:47,722 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-06 05:10:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:47,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933023262] [2021-05-06 05:10:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:47,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:10:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:47,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:47,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933023262] [2021-05-06 05:10:47,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933023262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:47,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:47,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:10:47,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054084685] [2021-05-06 05:10:47,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:10:47,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:47,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:10:47,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:10:47,931 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-05-06 05:10:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:48,119 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-06 05:10:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:10:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2021-05-06 05:10:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:48,126 INFO L225 Difference]: With dead ends: 47 [2021-05-06 05:10:48,127 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 05:10:48,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:10:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 05:10:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 05:10:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:10:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 05:10:48,165 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 05:10:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:48,167 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 05:10:48,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-05-06 05:10:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 05:10:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:10:48,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:48,169 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:48,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:10:48,170 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:48,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-06 05:10:48,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:48,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367493107] [2021-05-06 05:10:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:48,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:10:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:48,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:48,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367493107] [2021-05-06 05:10:48,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367493107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:48,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:48,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:10:48,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105168821] [2021-05-06 05:10:48,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:48,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:48,342 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:48,522 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-06 05:10:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 05:10:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:48,524 INFO L225 Difference]: With dead ends: 32 [2021-05-06 05:10:48,524 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 05:10:48,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 05:10:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 05:10:48,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:10:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 05:10:48,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 05:10:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:48,550 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 05:10:48,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:10:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 05:10:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:10:48,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:48,551 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:48,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:10:48,551 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:48,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-06 05:10:48,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:48,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60706461] [2021-05-06 05:10:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:48,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:10:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:48,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:48,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60706461] [2021-05-06 05:10:48,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60706461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:48,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:48,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:10:48,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205765164] [2021-05-06 05:10:48,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:48,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:48,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:48,693 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-05-06 05:10:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:49,011 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 05:10:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2021-05-06 05:10:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:49,013 INFO L225 Difference]: With dead ends: 36 [2021-05-06 05:10:49,013 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:10:49,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:10:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:10:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 05:10:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:10:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 05:10:49,024 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 05:10:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:49,024 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 05:10:49,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-05-06 05:10:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 05:10:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:10:49,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:49,024 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:49,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:10:49,025 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2021-05-06 05:10:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:49,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715824491] [2021-05-06 05:10:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:49,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:49,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144501955] [2021-05-06 05:10:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:10:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:10:49,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:49,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715824491] [2021-05-06 05:10:49,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:49,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144501955] [2021-05-06 05:10:49,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144501955] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:49,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:49,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:10:49,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526110710] [2021-05-06 05:10:49,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:49,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:49,203 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:10:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:49,247 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 05:10:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:10:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 17 [2021-05-06 05:10:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:49,248 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:10:49,248 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 05:10:49,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 05:10:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 05:10:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:10:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 05:10:49,254 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2021-05-06 05:10:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:49,254 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 05:10:49,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:10:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 05:10:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:10:49,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:49,255 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:49,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:49,469 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2021-05-06 05:10:49,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:49,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070580436] [2021-05-06 05:10:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:49,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913863913] [2021-05-06 05:10:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:49,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:10:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:49,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:10:49,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:49,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070580436] [2021-05-06 05:10:49,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:49,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913863913] [2021-05-06 05:10:49,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913863913] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:10:49,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:10:49,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:10:49,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066444399] [2021-05-06 05:10:49,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:49,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:49,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:49,604 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:10:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:49,632 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:10:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:10:49,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:10:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:49,633 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:10:49,633 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 05:10:49,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 05:10:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 05:10:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:10:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-06 05:10:49,638 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-06 05:10:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:49,638 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-06 05:10:49,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:10:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-06 05:10:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:10:49,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:49,639 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:49,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:49,850 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:49,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2021-05-06 05:10:49,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:49,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628299249] [2021-05-06 05:10:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:49,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:49,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782585873] [2021-05-06 05:10:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:49,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:10:49,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:49,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:49,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:49,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:50,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:50,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:50,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:10:50,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:50,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628299249] [2021-05-06 05:10:50,051 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:50,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782585873] [2021-05-06 05:10:50,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782585873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:50,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:50,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 05:10:50,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811107700] [2021-05-06 05:10:50,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:10:50,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:10:50,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:10:50,052 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:50,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:50,087 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-05-06 05:10:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:50,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 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 30 [2021-05-06 05:10:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:50,088 INFO L225 Difference]: With dead ends: 50 [2021-05-06 05:10:50,088 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 05:10:50,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 05:10:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 05:10:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:10:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 05:10:50,101 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2021-05-06 05:10:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:50,101 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 05:10:50,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 05:10:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:10:50,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:50,102 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:50,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:50,305 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2021-05-06 05:10:50,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:50,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972240219] [2021-05-06 05:10:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:50,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:50,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776554771] [2021-05-06 05:10:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:10:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:50,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:10:50,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:50,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972240219] [2021-05-06 05:10:50,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:50,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776554771] [2021-05-06 05:10:50,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776554771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:50,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:50,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:50,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333779433] [2021-05-06 05:10:50,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:50,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:50,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:50,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:50,507 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:50,598 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-06 05:10:50,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 05:10:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:50,604 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:10:50,604 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 05:10:50,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 05:10:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 05:10:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:10:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-06 05:10:50,615 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2021-05-06 05:10:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:50,615 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-06 05:10:50,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:10:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-06 05:10:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 05:10:50,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:50,616 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:50,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:50,831 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2021-05-06 05:10:50,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:50,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180286036] [2021-05-06 05:10:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:50,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:50,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786934195] [2021-05-06 05:10:50,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:50,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:10:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:10:51,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:51,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180286036] [2021-05-06 05:10:51,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:51,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786934195] [2021-05-06 05:10:51,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786934195] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:51,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:51,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84829839] [2021-05-06 05:10:51,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:51,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:51,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:51,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:51,031 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:10:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:51,116 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-05-06 05:10:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-06 05:10:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:51,119 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:10:51,120 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 05:10:51,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 05:10:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 05:10:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 05:10:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-06 05:10:51,133 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 35 [2021-05-06 05:10:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:51,133 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-06 05:10:51,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:10:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-06 05:10:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:10:51,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:51,136 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:51,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:51,353 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:51,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:51,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1183106562, now seen corresponding path program 3 times [2021-05-06 05:10:51,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:51,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65524990] [2021-05-06 05:10:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:51,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:51,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809469677] [2021-05-06 05:10:51,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:51,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:10:51,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:10:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:51,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:10:51,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65524990] [2021-05-06 05:10:51,539 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:51,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809469677] [2021-05-06 05:10:51,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809469677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:51,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:51,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:51,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561799207] [2021-05-06 05:10:51,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:51,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:51,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:51,542 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:10:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:51,603 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-06 05:10:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:10:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 05:10:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:51,604 INFO L225 Difference]: With dead ends: 62 [2021-05-06 05:10:51,604 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 05:10:51,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 05:10:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 05:10:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:10:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-05-06 05:10:51,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 40 [2021-05-06 05:10:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:51,609 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-05-06 05:10:51,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:10:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-05-06 05:10:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:10:51,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:51,610 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:51,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:51,821 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1332643880, now seen corresponding path program 2 times [2021-05-06 05:10:51,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:51,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944216287] [2021-05-06 05:10:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:51,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:51,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243213980] [2021-05-06 05:10:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:51,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:51,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 05:10:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:51,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:51,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:10:52,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:52,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944216287] [2021-05-06 05:10:52,002 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:52,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243213980] [2021-05-06 05:10:52,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243213980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:52,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:52,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:10:52,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796109877] [2021-05-06 05:10:52,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:10:52,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:10:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:10:52,006 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:10:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:52,048 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-05-06 05:10:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-06 05:10:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:52,049 INFO L225 Difference]: With dead ends: 68 [2021-05-06 05:10:52,049 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 05:10:52,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 05:10:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 05:10:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:10:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-05-06 05:10:52,060 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 48 [2021-05-06 05:10:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:52,061 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-05-06 05:10:52,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:10:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-05-06 05:10:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:10:52,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:52,063 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:52,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:10:52,264 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1330975584, now seen corresponding path program 4 times [2021-05-06 05:10:52,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:52,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96841645] [2021-05-06 05:10:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:52,270 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:52,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22453044] [2021-05-06 05:10:52,270 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:52,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:10:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:10:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:52,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 05:10:52,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96841645] [2021-05-06 05:10:52,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22453044] [2021-05-06 05:10:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22453044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:52,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:52,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:10:52,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235303486] [2021-05-06 05:10:52,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:10:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:10:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:52,401 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:10:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:52,455 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-05-06 05:10:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:10:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-05-06 05:10:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:52,458 INFO L225 Difference]: With dead ends: 65 [2021-05-06 05:10:52,458 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 05:10:52,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:10:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 05:10:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 05:10:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:10:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-05-06 05:10:52,465 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2021-05-06 05:10:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:52,465 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-05-06 05:10:52,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:10:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-05-06 05:10:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 05:10:52,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:52,467 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:52,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 05:10:52,673 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 107606955, now seen corresponding path program 5 times [2021-05-06 05:10:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:52,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397065843] [2021-05-06 05:10:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:52,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:52,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17101341] [2021-05-06 05:10:52,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:52,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 05:10:52,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:52,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 05:10:52,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:52,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:10:52,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397065843] [2021-05-06 05:10:52,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17101341] [2021-05-06 05:10:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17101341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:52,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:52,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:10:52,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345979772] [2021-05-06 05:10:52,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:10:52,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:10:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:52,846 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:10:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:52,923 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-06 05:10:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:10:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 05:10:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:52,924 INFO L225 Difference]: With dead ends: 76 [2021-05-06 05:10:52,924 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 05:10:52,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 05:10:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 05:10:52,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 05:10:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-06 05:10:52,930 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 53 [2021-05-06 05:10:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:52,930 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-06 05:10:52,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:10:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-06 05:10:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 05:10:52,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:52,931 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:53,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:53,141 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1960424256, now seen corresponding path program 6 times [2021-05-06 05:10:53,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:53,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011579577] [2021-05-06 05:10:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:53,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:53,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747972163] [2021-05-06 05:10:53,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-06 05:10:53,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 05:10:53,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:53,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 05:10:53,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 05:10:53,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:53,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011579577] [2021-05-06 05:10:53,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:53,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747972163] [2021-05-06 05:10:53,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747972163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:53,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:53,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:10:53,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998507355] [2021-05-06 05:10:53,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:10:53,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:53,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:10:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:10:53,399 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:10:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:53,529 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-05-06 05:10:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:10:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-06 05:10:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:53,532 INFO L225 Difference]: With dead ends: 80 [2021-05-06 05:10:53,532 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 05:10:53,533 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:10:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 05:10:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 05:10:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:10:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-05-06 05:10:53,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2021-05-06 05:10:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:53,540 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-05-06 05:10:53,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:10:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-05-06 05:10:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:10:53,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:53,541 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:53,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:53,747 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:53,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1498675765, now seen corresponding path program 1 times [2021-05-06 05:10:53,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:53,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875293936] [2021-05-06 05:10:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:53,753 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:53,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607421408] [2021-05-06 05:10:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:10:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:53,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 05:10:53,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:53,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875293936] [2021-05-06 05:10:53,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:53,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607421408] [2021-05-06 05:10:53,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607421408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:53,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:53,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:10:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644109959] [2021-05-06 05:10:53,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:10:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:10:53,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:53,915 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:53,970 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-05-06 05:10:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:10:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:10:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:53,972 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:10:53,972 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 05:10:53,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:10:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 05:10:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 05:10:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:10:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-05-06 05:10:53,979 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2021-05-06 05:10:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:53,983 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-05-06 05:10:53,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-05-06 05:10:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:10:53,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:53,984 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:54,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 05:10:54,197 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash -940246227, now seen corresponding path program 7 times [2021-05-06 05:10:54,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:54,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49859893] [2021-05-06 05:10:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:54,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:54,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99829612] [2021-05-06 05:10:54,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 05:10:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:54,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 05:10:54,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:54,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49859893] [2021-05-06 05:10:54,386 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:54,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99829612] [2021-05-06 05:10:54,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99829612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:54,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:54,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:54,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180921267] [2021-05-06 05:10:54,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:54,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:54,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:54,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:54,387 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:54,471 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-05-06 05:10:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:54,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:10:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:54,472 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:10:54,472 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 05:10:54,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:10:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 05:10:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 05:10:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:10:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-05-06 05:10:54,481 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 71 [2021-05-06 05:10:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:54,481 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-05-06 05:10:54,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:10:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-05-06 05:10:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 05:10:54,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:54,482 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:54,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 05:10:54,697 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:54,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1041167106, now seen corresponding path program 8 times [2021-05-06 05:10:54,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:54,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953649787] [2021-05-06 05:10:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:54,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:54,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270646466] [2021-05-06 05:10:54,702 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:54,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:54,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:54,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 05:10:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:54,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 05:10:54,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:54,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953649787] [2021-05-06 05:10:54,890 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:54,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270646466] [2021-05-06 05:10:54,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270646466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:54,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:54,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:54,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60445374] [2021-05-06 05:10:54,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:54,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:54,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:54,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:54,891 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:10:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:54,988 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-05-06 05:10:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-06 05:10:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:54,990 INFO L225 Difference]: With dead ends: 98 [2021-05-06 05:10:54,990 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 05:10:54,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:10:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 05:10:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 05:10:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:10:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-05-06 05:10:54,995 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 76 [2021-05-06 05:10:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:54,996 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-05-06 05:10:54,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:10:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-05-06 05:10:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:10:54,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:54,996 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:55,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 05:10:55,214 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash 122742071, now seen corresponding path program 2 times [2021-05-06 05:10:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:55,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872612781] [2021-05-06 05:10:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:55,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:55,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839394918] [2021-05-06 05:10:55,219 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:55,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:10:55,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 05:10:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:55,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 05:10:55,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:55,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872612781] [2021-05-06 05:10:55,391 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:55,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839394918] [2021-05-06 05:10:55,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839394918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:55,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:55,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:55,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357081938] [2021-05-06 05:10:55,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:55,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:55,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:55,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:55,396 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:10:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:55,469 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-05-06 05:10:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 05:10:55,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 89 [2021-05-06 05:10:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:55,470 INFO L225 Difference]: With dead ends: 112 [2021-05-06 05:10:55,470 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 05:10:55,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:10:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 05:10:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 05:10:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:10:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-05-06 05:10:55,477 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2021-05-06 05:10:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:55,477 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-05-06 05:10:55,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:10:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-05-06 05:10:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:10:55,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:55,478 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:55,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:55,693 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1978787375, now seen corresponding path program 9 times [2021-05-06 05:10:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:55,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113985234] [2021-05-06 05:10:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:55,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:55,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644737444] [2021-05-06 05:10:55,698 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:55,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 05:10:55,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:10:55,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:10:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:55,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-06 05:10:55,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:55,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113985234] [2021-05-06 05:10:55,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:55,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644737444] [2021-05-06 05:10:55,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644737444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:55,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:55,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:10:55,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715876608] [2021-05-06 05:10:55,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:10:55,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:55,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:10:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:10:55,973 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:10:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:56,165 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-05-06 05:10:56,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:10:56,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-05-06 05:10:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:56,166 INFO L225 Difference]: With dead ends: 100 [2021-05-06 05:10:56,166 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:10:56,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:10:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:10:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:10:56,167 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) [2021-05-06 05:10:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:10:56,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-05-06 05:10:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:56,167 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:10:56,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:10:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:10:56,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:10:56,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 05:10:56,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:10:56,762 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)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2021-05-06 05:10:56,762 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-06 05:10:56,762 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:10:56,763 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:10:56,763 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:56,763 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:10:56,763 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-06 05:10:56,763 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:56,763 INFO L198 CegarLoopUtils]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:10:56,763 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-06 05:10:56,763 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-06 05:10:56,763 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-06 05:10:56,764 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-06 05:10:56,764 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:10:56,764 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:10:56,764 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-06 05:10:56,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:10:56 BoogieIcfgContainer [2021-05-06 05:10:56,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:10:56,774 INFO L168 Benchmark]: Toolchain (without parser) took 9658.12 ms. Allocated memory was 169.9 MB in the beginning and 248.5 MB in the end (delta: 78.6 MB). Free memory was 134.0 MB in the beginning and 132.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 80.9 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:56,774 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 169.9 MB. Free memory is still 150.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:10:56,774 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.03 ms. Allocated memory is still 169.9 MB. Free memory was 133.9 MB in the beginning and 153.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:56,774 INFO L168 Benchmark]: Boogie Preprocessor took 33.94 ms. Allocated memory is still 169.9 MB. Free memory was 153.1 MB in the beginning and 151.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:56,774 INFO L168 Benchmark]: RCFGBuilder took 320.08 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 136.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:56,774 INFO L168 Benchmark]: TraceAbstraction took 9110.16 ms. Allocated memory was 169.9 MB in the beginning and 248.5 MB in the end (delta: 78.6 MB). Free memory was 136.3 MB in the beginning and 132.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 84.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:56,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 169.9 MB. Free memory is still 150.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 189.03 ms. Allocated memory is still 169.9 MB. Free memory was 133.9 MB in the beginning and 153.1 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.94 ms. Allocated memory is still 169.9 MB. Free memory was 153.1 MB in the beginning and 151.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 320.08 ms. Allocated memory is still 169.9 MB. Free memory was 151.5 MB in the beginning and 136.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9110.16 ms. Allocated memory was 169.9 MB in the beginning and 248.5 MB in the end (delta: 78.6 MB). Free memory was 136.3 MB in the beginning and 132.5 MB in the end (delta: 3.8 MB). Peak memory consumption was 84.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8670.5ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 19.4ms, AutomataDifference: 1909.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 384.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 128 SDslu, 1703 SDs, 0 SdLazy, 1083 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1035.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 845.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=17, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 157.1ms AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 63 PreInvPairs, 100 NumberOfFragments, 240 HoareAnnotationTreeSize, 63 FomulaSimplifications, 970 FormulaSimplificationTreeSizeReduction, 74.2ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 645 FormulaSimplificationTreeSizeReductionInter, 300.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 144.1ms SsaConstructionTime, 488.8ms SatisfiabilityAnalysisTime, 2082.7ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 741 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 794 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2665 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1501/2065 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: 30]: Loop Invariant Derived loop invariant: (s * 4 == t * t + t * 2 + 1 && a * 2 + 1 == t) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...