/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/ps6-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:07:42,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:07:42,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:07:42,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:07:42,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:07:42,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:07:42,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:07:42,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:07:42,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:07:42,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:07:42,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:07:42,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:07:42,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:07:42,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:07:42,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:07:42,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:07:42,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:07:42,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:07:42,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:07:42,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:07:42,472 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 05:07:42,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:07:42,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:07:42,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:07:42,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:07:42,526 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:07:42,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:07:42,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:07:42,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:07:42,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:07:42,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:07:42,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:07:42,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:07:42,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:07:42,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:07:42,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:07:42,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:07:42,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:07:42,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:07:42,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:07:42,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:07:42,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:07:42,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:07:42,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:07:42,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:07:42,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:07:42,933 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:07:42,934 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:07:42,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-05-06 05:07:43,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0ea0d57/fca8e15e3cfb408a95bead0f91ef1622/FLAGc964eeaf3 [2021-05-06 05:07:43,425 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:07:43,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-05-06 05:07:43,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0ea0d57/fca8e15e3cfb408a95bead0f91ef1622/FLAGc964eeaf3 [2021-05-06 05:07:43,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b0ea0d57/fca8e15e3cfb408a95bead0f91ef1622 [2021-05-06 05:07:43,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:07:43,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:07:43,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:07:43,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:07:43,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:07:43,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:07:43" (1/1) ... [2021-05-06 05:07:43,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526cf512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:43, skipping insertion in model container [2021-05-06 05:07:43,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:07:43" (1/1) ... [2021-05-06 05:07:43,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:07:43,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:07:43,954 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/ps6-ll_valuebound50.c[458,471] [2021-05-06 05:07:43,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:07:43,976 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:07:43,986 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/ps6-ll_valuebound50.c[458,471] [2021-05-06 05:07:43,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:07:44,006 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:07:44,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44 WrapperNode [2021-05-06 05:07:44,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:07:44,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:07:44,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:07:44,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:07:44,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... [2021-05-06 05:07:44,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... [2021-05-06 05:07:44,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... [2021-05-06 05:07:44,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... [2021-05-06 05:07:44,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... [2021-05-06 05:07:44,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... [2021-05-06 05:07:44,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... [2021-05-06 05:07:44,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:07:44,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:07:44,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:07:44,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:07:44,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:07:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:07:44,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:07:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:07:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:07:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:07:44,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:07:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:07:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:07:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:07:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:07:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 05:07:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:07:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:07:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:07:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:07:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:07:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:07:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:07:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:07:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:07:44,478 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:07:44,478 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:07:44,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:07:44 BoogieIcfgContainer [2021-05-06 05:07:44,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:07:44,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:07:44,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:07:44,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:07:44,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:07:43" (1/3) ... [2021-05-06 05:07:44,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6495cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:07:44, skipping insertion in model container [2021-05-06 05:07:44,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:44" (2/3) ... [2021-05-06 05:07:44,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6495cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:07:44, skipping insertion in model container [2021-05-06 05:07:44,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:07:44" (3/3) ... [2021-05-06 05:07:44,503 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.c [2021-05-06 05:07:44,507 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:07:44,511 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:07:44,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:07:44,590 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:07:44,590 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:07:44,590 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:07:44,590 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:07:44,590 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:07:44,590 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:07:44,591 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:07:44,591 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:07:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:07:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:07:44,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:44,617 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:44,617 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-06 05:07:44,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:44,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762356960] [2021-05-06 05:07:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:44,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:07:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:44,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:07:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:44,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 05:07:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:44,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:44,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762356960] [2021-05-06 05:07:44,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762356960] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:07:44,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:07:44,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:07:44,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924457026] [2021-05-06 05:07:44,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:07:44,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:44,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:07:44,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:07:44,914 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:07:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:44,996 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-06 05:07:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:07:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:07:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:45,004 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:07:45,005 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 05:07:45,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:07:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 05:07:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 05:07:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:07:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 05:07:45,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 05:07:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:45,044 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 05:07:45,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:07:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 05:07:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:07:45,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:45,046 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:45,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:07:45,046 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:45,047 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-06 05:07:45,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:45,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582282200] [2021-05-06 05:07:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:45,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:45,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982913649] [2021-05-06 05:07:45,068 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 05:07:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:07:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:45,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:45,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:45,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582282200] [2021-05-06 05:07:45,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:45,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982913649] [2021-05-06 05:07:45,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982913649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:07:45,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:07:45,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:07:45,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930000920] [2021-05-06 05:07:45,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:07:45,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:07:45,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:07:45,397 INFO L87 Difference]: Start difference. First operand 24 states and 27 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 05:07:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:45,507 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-06 05:07:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:07:45,508 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), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 05:07:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:45,509 INFO L225 Difference]: With dead ends: 35 [2021-05-06 05:07:45,509 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 05:07:45,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:07:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 05:07:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 05:07:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:07:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 05:07:45,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 05:07:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:45,519 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 05:07:45,520 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 05:07:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 05:07:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 05:07:45,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:45,521 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:45,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 05:07:45,737 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:45,738 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-06 05:07:45,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:45,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400614798] [2021-05-06 05:07:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:45,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:45,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700956795] [2021-05-06 05:07:45,751 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 05:07:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:45,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:07:45,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:46,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:46,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400614798] [2021-05-06 05:07:46,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:46,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700956795] [2021-05-06 05:07:46,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700956795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:46,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:46,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:07:46,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718981394] [2021-05-06 05:07:46,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:07:46,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:46,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:07:46,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:07:46,018 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 05:07:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:46,141 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 05:07:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:07:46,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 29 [2021-05-06 05:07:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:46,144 INFO L225 Difference]: With dead ends: 42 [2021-05-06 05:07:46,145 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 05:07:46,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 05:07:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 05:07:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:07:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 05:07:46,167 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 05:07:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:46,168 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 05:07:46,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 05:07:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 05:07:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 05:07:46,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:46,170 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:46,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:46,376 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:46,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-06 05:07:46,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:46,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730615231] [2021-05-06 05:07:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:46,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:46,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328221] [2021-05-06 05:07:46,398 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 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 05:07:46,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:07:46,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:07:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:46,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 05:07:46,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:46,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730615231] [2021-05-06 05:07:46,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:46,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328221] [2021-05-06 05:07:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:46,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:46,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:07:46,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769471172] [2021-05-06 05:07:46,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:07:46,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:07:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:46,781 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 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 05:07:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:46,874 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-06 05:07:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:07:46,875 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), 4 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 36 [2021-05-06 05:07:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:46,877 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:07:46,877 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 05:07:46,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:07:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 05:07:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 05:07:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:07:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 05:07:46,887 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 05:07:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:46,887 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 05:07:46,888 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), 4 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 05:07:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 05:07:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:07:46,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:46,889 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:47,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:47,094 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-06 05:07:47,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:47,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100041087] [2021-05-06 05:07:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:47,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:47,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984367654] [2021-05-06 05:07:47,111 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 05:07:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:47,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:07:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:47,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:47,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 05:07:48,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100041087] [2021-05-06 05:07:48,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:48,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984367654] [2021-05-06 05:07:48,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984367654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:48,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:48,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:07:48,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561140881] [2021-05-06 05:07:48,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:07:48,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:07:48,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:48,010 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:07:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:48,211 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-06 05:07:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:07:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 05:07:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:48,213 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:07:48,213 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 05:07:48,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 660.8ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:07:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 05:07:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 05:07:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:07:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 05:07:48,224 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 05:07:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:48,224 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 05:07:48,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:07:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 05:07:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 05:07:48,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:48,225 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:48,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:48,433 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:48,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:48,434 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-06 05:07:48,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:48,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341203046] [2021-05-06 05:07:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:48,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:48,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237450171] [2021-05-06 05:07:48,444 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 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 05:07:49,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:07:49,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:07:49,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:49,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 05:07:49,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341203046] [2021-05-06 05:07:49,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237450171] [2021-05-06 05:07:49,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237450171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:49,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:49,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:07:49,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444668207] [2021-05-06 05:07:49,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:07:49,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:07:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:49,350 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 05:07:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:49,426 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 05:07:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:07:49,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 05:07:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:49,427 INFO L225 Difference]: With dead ends: 52 [2021-05-06 05:07:49,427 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 05:07:49,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:07:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 05:07:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 05:07:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:07:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 05:07:49,436 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 05:07:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:49,437 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 05:07:49,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 05:07:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 05:07:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 05:07:49,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:49,438 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:49,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:07:49,638 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2021-05-06 05:07:49,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:49,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433206257] [2021-05-06 05:07:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:49,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:49,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355951341] [2021-05-06 05:07:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:49,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:07:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 05:07:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:49,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 05:07:49,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:49,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433206257] [2021-05-06 05:07:49,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:49,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355951341] [2021-05-06 05:07:49,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355951341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:49,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:49,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:07:49,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988912644] [2021-05-06 05:07:49,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:07:49,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:49,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:07:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:07:49,921 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 05:07:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:50,015 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-06 05:07:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:07:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 05:07:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:50,016 INFO L225 Difference]: With dead ends: 49 [2021-05-06 05:07:50,017 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 05:07:50,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 05:07:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 05:07:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:07:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 05:07:50,025 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 05:07:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:50,026 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 05:07:50,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 05:07:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 05:07:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 05:07:50,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:50,027 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:50,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:50,241 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2021-05-06 05:07:50,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:50,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446597810] [2021-05-06 05:07:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:50,268 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:50,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506465883] [2021-05-06 05:07:50,269 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 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 05:07:50,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 05:07:50,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 05:07:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:50,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 05:07:50,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:50,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446597810] [2021-05-06 05:07:50,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:50,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506465883] [2021-05-06 05:07:50,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506465883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:50,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:50,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 05:07:50,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240408136] [2021-05-06 05:07:50,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:07:50,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:07:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:07:50,675 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 05:07:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:50,786 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-05-06 05:07:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:07:50,786 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 05:07:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:50,787 INFO L225 Difference]: With dead ends: 52 [2021-05-06 05:07:50,787 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 05:07:50,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:07:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 05:07:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 05:07:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 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 05:07:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 05:07:50,796 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 05:07:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:50,797 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 05:07:50,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 05:07:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 05:07:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 05:07:50,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:50,798 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:51,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:07:51,006 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 4 times [2021-05-06 05:07:51,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:51,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689880127] [2021-05-06 05:07:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:51,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:51,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662230581] [2021-05-06 05:07:51,016 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 05:07:51,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:07:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:51,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 05:07:51,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:51,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 05:07:51,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:51,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689880127] [2021-05-06 05:07:51,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:51,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662230581] [2021-05-06 05:07:51,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662230581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:51,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:51,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:07:51,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192351453] [2021-05-06 05:07:51,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:07:51,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:51,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:07:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:51,279 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 05:07:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:51,439 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-06 05:07:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:07:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 05:07:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:51,443 INFO L225 Difference]: With dead ends: 55 [2021-05-06 05:07:51,443 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 05:07:51,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:07:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 05:07:51,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 05:07:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:07:51,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 05:07:51,464 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 05:07:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:51,465 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 05:07:51,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 05:07:51,465 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 05:07:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 05:07:51,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:51,468 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:51,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 05:07:51,693 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 5 times [2021-05-06 05:07:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:51,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78138036] [2021-05-06 05:07:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:51,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:51,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893100142] [2021-05-06 05:07:51,703 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 05:07:52,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 05:07:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 05:07:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:52,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 05:07:52,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:52,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78138036] [2021-05-06 05:07:52,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:52,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893100142] [2021-05-06 05:07:52,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893100142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:52,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:52,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 05:07:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193550280] [2021-05-06 05:07:52,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 05:07:52,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 05:07:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:07:52,609 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 05:07:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:52,771 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-06 05:07:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 05:07:52,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-06 05:07:52,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:52,772 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:07:52,772 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 05:07:52,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:07:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 05:07:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 05:07:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:07:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-06 05:07:52,782 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-06 05:07:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:52,782 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-06 05:07:52,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 05:07:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-06 05:07:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 05:07:52,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:52,784 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:52,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:52,990 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 6 times [2021-05-06 05:07:52,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:52,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266907435] [2021-05-06 05:07:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:52,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:52,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529719848] [2021-05-06 05:07:52,998 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