/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/ps4-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:39,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:39,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:39,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:44:39,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:39,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:39,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:39,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:39,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:39,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:39,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:39,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:39,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:39,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:39,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:39,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:39,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:44:39,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:39,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:39,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:39,306 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 04:44:39,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:39,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:39,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:39,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:39,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:39,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:39,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:39,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:39,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:39,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:39,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:39,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:39,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:39,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:39,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:39,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:39,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:39,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:39,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:39,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:39,339 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:39,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:39,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:39,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:39,593 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:39,606 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:39,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-05-06 04:44:39,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392ce0946/d223d2da25954d4691cb0e2819c046db/FLAG56ddd0f31 [2021-05-06 04:44:40,035 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:40,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-05-06 04:44:40,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392ce0946/d223d2da25954d4691cb0e2819c046db/FLAG56ddd0f31 [2021-05-06 04:44:40,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/392ce0946/d223d2da25954d4691cb0e2819c046db [2021-05-06 04:44:40,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:40,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:40,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:40,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:40,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:40,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11808f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40, skipping insertion in model container [2021-05-06 04:44:40,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:40,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:40,189 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/ps4-ll_valuebound10.c[458,471] [2021-05-06 04:44:40,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:40,208 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:40,253 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/ps4-ll_valuebound10.c[458,471] [2021-05-06 04:44:40,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:40,274 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:40,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40 WrapperNode [2021-05-06 04:44:40,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:40,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:40,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:40,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:40,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... [2021-05-06 04:44:40,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:40,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:40,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:40,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:40,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:40,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:40,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:40,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:40,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:40,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:40,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:40,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:40,570 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:40,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:40 BoogieIcfgContainer [2021-05-06 04:44:40,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:40,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:40,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:40,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:40,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:40" (1/3) ... [2021-05-06 04:44:40,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c2eb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:40, skipping insertion in model container [2021-05-06 04:44:40,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:40" (2/3) ... [2021-05-06 04:44:40,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c2eb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:40, skipping insertion in model container [2021-05-06 04:44:40,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:40" (3/3) ... [2021-05-06 04:44:40,575 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.c [2021-05-06 04:44:40,579 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:40,598 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:40,610 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:40,639 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:40,639 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:40,639 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:40,639 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:40,639 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:40,639 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:40,639 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:40,639 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:44:40,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:40,654 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:40,654 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-06 04:44:40,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:40,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337317846] [2021-05-06 04:44:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:40,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:40,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:44:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:40,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:40,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337317846] [2021-05-06 04:44:40,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337317846] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:40,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:40,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:40,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743229756] [2021-05-06 04:44:40,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:40,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:40,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:40,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:40,812 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:40,877 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-06 04:44:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:40,879 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:44:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:40,883 INFO L225 Difference]: With dead ends: 47 [2021-05-06 04:44:40,883 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 04:44:40,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 04:44:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 04:44:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 04:44:40,908 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 04:44:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:40,909 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 04:44:40,909 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 04:44:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:44:40,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:40,910 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:40,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:40,910 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-06 04:44:40,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:40,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660050009] [2021-05-06 04:44:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:40,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:40,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492882585] [2021-05-06 04:44:40,922 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 04:44:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:41,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:41,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:41,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660050009] [2021-05-06 04:44:41,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:41,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492882585] [2021-05-06 04:44:41,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492882585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:41,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:41,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:41,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181713538] [2021-05-06 04:44:41,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:41,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:41,066 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:41,101 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:44:41,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:44:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:41,102 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:44:41,102 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 04:44:41,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 04:44:41,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 04:44:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 04:44:41,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 04:44:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:41,110 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 04:44:41,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 04:44:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:44:41,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:41,111 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:41,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:41,330 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:41,331 INFO L82 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2021-05-06 04:44:41,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:41,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247254292] [2021-05-06 04:44:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:41,341 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:41,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212576900] [2021-05-06 04:44:41,341 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 04:44:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:41,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:41,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:41,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247254292] [2021-05-06 04:44:41,464 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:41,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212576900] [2021-05-06 04:44:41,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212576900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:41,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:41,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:41,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767100267] [2021-05-06 04:44:41,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:41,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:41,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:41,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:41,465 INFO L87 Difference]: Start difference. First operand 30 states and 32 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:44:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:41,523 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-06 04:44:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:41,523 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 04:44:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:41,524 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:41,524 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 04:44:41,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 04:44:41,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 04:44:41,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 04:44:41,531 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-06 04:44:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:41,531 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 04:44:41,531 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:44:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 04:44:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 04:44:41,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:41,532 INFO L523 BasicCegarLoop]: trace histogram [3, 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 04:44:41,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:41,748 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:41,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2021-05-06 04:44:41,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:41,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505501252] [2021-05-06 04:44:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:41,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:41,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509480615] [2021-05-06 04:44:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:41,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:44:41,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:41,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505501252] [2021-05-06 04:44:41,920 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:41,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509480615] [2021-05-06 04:44:41,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509480615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:41,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:41,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:41,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446908673] [2021-05-06 04:44:41,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:41,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:41,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:41,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:41,921 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:41,966 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-06 04:44:41,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:41,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 04:44:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:41,967 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:44:41,968 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 04:44:41,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 04:44:41,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 04:44:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 04:44:41,973 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-06 04:44:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:41,973 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 04:44:41,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 04:44:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 04:44:41,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:41,974 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:42,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:42,193 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -965543213, now seen corresponding path program 2 times [2021-05-06 04:44:42,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:42,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598847804] [2021-05-06 04:44:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:42,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:42,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642410437] [2021-05-06 04:44:42,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:42,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:42,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:44:42,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:42,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:44:42,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:42,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598847804] [2021-05-06 04:44:42,333 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:42,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642410437] [2021-05-06 04:44:42,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642410437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:42,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:42,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:42,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847812089] [2021-05-06 04:44:42,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:42,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:42,334 INFO L87 Difference]: Start difference. First operand 37 states and 39 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:42,403 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-05-06 04:44:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:42,404 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 04:44:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:42,404 INFO L225 Difference]: With dead ends: 48 [2021-05-06 04:44:42,404 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:42,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-06 04:44:42,410 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-06 04:44:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:42,411 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-06 04:44:42,411 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-06 04:44:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 04:44:42,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:42,411 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:42,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:42,624 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 2 times [2021-05-06 04:44:42,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:42,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078393809] [2021-05-06 04:44:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:42,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:42,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982155542] [2021-05-06 04:44:42,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:42,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:42,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:42,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 04:44:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:42,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 04:44:42,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078393809] [2021-05-06 04:44:42,852 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:42,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982155542] [2021-05-06 04:44:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982155542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:42,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:42,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:44:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061857893] [2021-05-06 04:44:42,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:44:42,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:44:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:42,853 INFO L87 Difference]: Start difference. First operand 45 states and 48 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:44:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:42,940 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-05-06 04:44:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:44:42,940 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 04:44:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:42,942 INFO L225 Difference]: With dead ends: 51 [2021-05-06 04:44:42,942 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:44:42,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:44:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:44:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 04:44:42,954 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-06 04:44:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:42,954 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 04:44:42,955 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:44:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 04:44:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 04:44:42,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:42,955 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:43,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 04:44:43,157 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1045939826, now seen corresponding path program 3 times [2021-05-06 04:44:43,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:43,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083130812] [2021-05-06 04:44:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:43,164 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:43,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055047715] [2021-05-06 04:44:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:43,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:44:43,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:43,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 04:44:43,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:43,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083130812] [2021-05-06 04:44:43,360 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:43,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055047715] [2021-05-06 04:44:43,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055047715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:43,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:43,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:43,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432258281] [2021-05-06 04:44:43,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:43,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:43,361 INFO L87 Difference]: Start difference. First operand 44 states and 46 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:44:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:43,413 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-05-06 04:44:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:43,413 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 04:44:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:43,414 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:44:43,414 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:43,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 04:44:43,419 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2021-05-06 04:44:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:43,419 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 04:44:43,420 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:44:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 04:44:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:44:43,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:43,420 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:43,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:43,637 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:43,637 INFO L82 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 3 times [2021-05-06 04:44:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:43,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259998202] [2021-05-06 04:44:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:43,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:43,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158477857] [2021-05-06 04:44:43,644 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 04:44:43,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:43,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 04:44:43,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:43,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259998202] [2021-05-06 04:44:43,870 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:43,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158477857] [2021-05-06 04:44:43,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158477857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:43,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:43,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:43,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420864160] [2021-05-06 04:44:43,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:43,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:43,872 INFO L87 Difference]: Start difference. First operand 45 states and 45 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:44:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:43,937 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-06 04:44:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:43,937 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2021-05-06 04:44:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:43,940 INFO L225 Difference]: With dead ends: 53 [2021-05-06 04:44:43,940 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 04:44:43,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 04:44:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 04:44:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-06 04:44:43,947 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-05-06 04:44:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:43,949 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-06 04:44:43,949 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:44:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-06 04:44:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 04:44:43,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:43,950 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:44,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:44:44,168 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:44,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 4 times [2021-05-06 04:44:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:44,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409321749] [2021-05-06 04:44:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:44,175 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:44,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237642897] [2021-05-06 04:44:44,176 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 04:44:44,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:44:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:44,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 04:44:44,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:44,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409321749] [2021-05-06 04:44:44,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:44,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237642897] [2021-05-06 04:44:44,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237642897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:44,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:44,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:44,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880478885] [2021-05-06 04:44:44,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:44,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:44,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:44,438 INFO L87 Difference]: Start difference. First operand 48 states and 49 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:44:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:44,513 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-06 04:44:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:44,514 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2021-05-06 04:44:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:44,514 INFO L225 Difference]: With dead ends: 56 [2021-05-06 04:44:44,514 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 04:44:44,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 04:44:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 04:44:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-06 04:44:44,521 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2021-05-06 04:44:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:44,522 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-06 04:44:44,522 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:44:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-06 04:44:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 04:44:44,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:44,522 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:44,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 04:44:44,741 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 5 times [2021-05-06 04:44:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:44,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574379784] [2021-05-06 04:44:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:44,747 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:44,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079746548] [2021-05-06 04:44:44,748 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 04:44:44,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:44,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:44:44,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:44,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 04:44:44,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:44,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574379784] [2021-05-06 04:44:44,999 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079746548] [2021-05-06 04:44:45,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079746548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:45,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:45,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:45,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561183910] [2021-05-06 04:44:45,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:45,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:45,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:45,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:45,003 INFO L87 Difference]: Start difference. First operand 51 states and 53 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:44:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:45,099 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-05-06 04:44:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:44:45,099 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2021-05-06 04:44:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:45,100 INFO L225 Difference]: With dead ends: 59 [2021-05-06 04:44:45,100 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 04:44:45,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 04:44:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 04:44:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-06 04:44:45,118 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2021-05-06 04:44:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:45,118 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-06 04:44:45,118 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:44:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-06 04:44:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 04:44:45,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:45,121 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:45,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:45,338 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:45,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 6 times [2021-05-06 04:44:45,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:45,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539390066] [2021-05-06 04:44:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:45,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:45,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092684431] [2021-05-06 04:44:45,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:45,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:45,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:45,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 04:44:45,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:45,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 04:44:45,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:45,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539390066] [2021-05-06 04:44:45,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:45,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092684431] [2021-05-06 04:44:45,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092684431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:45,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:45,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:45,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830282067] [2021-05-06 04:44:45,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:45,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:45,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:45,609 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:44:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:45,743 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-05-06 04:44:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-06 04:44:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:45,743 INFO L225 Difference]: With dead ends: 62 [2021-05-06 04:44:45,743 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 04:44:45,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 04:44:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 04:44:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-05-06 04:44:45,748 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 65 [2021-05-06 04:44:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:45,748 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-05-06 04:44:45,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:44:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-05-06 04:44:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 04:44:45,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:45,749 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:45,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:44:45,966 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 7 times [2021-05-06 04:44:45,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:45,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494238214] [2021-05-06 04:44:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:45,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:45,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253786310] [2021-05-06 04:44:45,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:46,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 04:44:46,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:46,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 92 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-06 04:44:46,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494238214] [2021-05-06 04:44:46,515 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253786310] [2021-05-06 04:44:46,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253786310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:46,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:46,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:46,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711462118] [2021-05-06 04:44:46,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:46,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:46,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:46,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:46,516 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:44:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:46,788 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-05-06 04:44:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2021-05-06 04:44:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:46,789 INFO L225 Difference]: With dead ends: 69 [2021-05-06 04:44:46,789 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 04:44:46,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 04:44:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 04:44:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-05-06 04:44:46,795 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 72 [2021-05-06 04:44:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:46,796 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-05-06 04:44:46,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:44:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-05-06 04:44:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 04:44:46,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:46,796 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:47,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 04:44:47,003 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 8 times [2021-05-06 04:44:47,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:47,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090547292] [2021-05-06 04:44:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:47,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:47,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141869805] [2021-05-06 04:44:47,009 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 04:44:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:47,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 04:44:47,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:47,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090547292] [2021-05-06 04:44:47,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:47,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141869805] [2021-05-06 04:44:47,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141869805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:47,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:47,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:47,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831925378] [2021-05-06 04:44:47,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:47,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:47,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:47,674 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:44:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:47,838 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-05-06 04:44:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2021-05-06 04:44:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:47,839 INFO L225 Difference]: With dead ends: 72 [2021-05-06 04:44:47,840 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 04:44:47,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 04:44:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 04:44:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-05-06 04:44:47,844 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 79 [2021-05-06 04:44:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:47,845 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-05-06 04:44:47,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:44:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-05-06 04:44:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 04:44:47,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:47,845 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:48,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:48,051 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 9 times [2021-05-06 04:44:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:48,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165300227] [2021-05-06 04:44:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:48,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:48,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105910930] [2021-05-06 04:44:48,056 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:48,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:48,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 04:44:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:48,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 04:44:48,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:48,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165300227] [2021-05-06 04:44:48,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:48,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105910930] [2021-05-06 04:44:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105910930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621156500] [2021-05-06 04:44:48,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:48,725 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:44:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:48,909 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-05-06 04:44:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 04:44:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2021-05-06 04:44:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:48,910 INFO L225 Difference]: With dead ends: 75 [2021-05-06 04:44:48,910 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 04:44:48,911 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 04:44:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 04:44:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-05-06 04:44:48,918 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 86 [2021-05-06 04:44:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:48,919 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-05-06 04:44:48,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:44:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-05-06 04:44:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 04:44:48,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:48,919 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:49,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 04:44:49,124 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 10 times [2021-05-06 04:44:49,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:49,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492969738] [2021-05-06 04:44:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:49,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:49,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418776681] [2021-05-06 04:44:49,132 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:49,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:49,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 04:44:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:49,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 04:44:50,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:50,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492969738] [2021-05-06 04:44:50,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:50,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418776681] [2021-05-06 04:44:50,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418776681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:50,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:50,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132409272] [2021-05-06 04:44:50,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:50,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:50,001 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 04:44:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:50,214 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-05-06 04:44:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:50,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2021-05-06 04:44:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:50,215 INFO L225 Difference]: With dead ends: 78 [2021-05-06 04:44:50,215 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 04:44:50,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 04:44:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-06 04:44:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 16 states have call successors, (16), 9 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-05-06 04:44:50,220 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 93 [2021-05-06 04:44:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:50,221 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-05-06 04:44:50,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 04:44:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-05-06 04:44:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 04:44:50,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:50,221 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:50,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:50,427 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 11 times [2021-05-06 04:44:50,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:50,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195046748] [2021-05-06 04:44:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:50,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:50,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336048300] [2021-05-06 04:44:50,437 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:50,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 04:44:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:50,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-06 04:44:50,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:50,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195046748] [2021-05-06 04:44:50,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:50,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336048300] [2021-05-06 04:44:50,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336048300] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:50,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:50,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-06 04:44:50,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345235599] [2021-05-06 04:44:50,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:50,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:50,994 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:44:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:51,066 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-05-06 04:44:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2021-05-06 04:44:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:51,067 INFO L225 Difference]: With dead ends: 77 [2021-05-06 04:44:51,067 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 04:44:51,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 04:44:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 04:44:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 04:44:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 04:44:51,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-05-06 04:44:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:51,069 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 04:44:51,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:44:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 04:44:51,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 04:44:51,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 04:44:51,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 04:44:51,795 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2021-05-06 04:44:52,048 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-05-06 04:44:52,457 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 04:44:52,505 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-06 04:44:52,505 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:44:52,506 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:44:52,506 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2021-05-06 04:44:52,506 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (let ((.cse3 (* main_~x~0 4)) (.cse2 (* main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (<= main_~k~0 10)) (.cse1 (= .cse3 (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse2 2))))) (or (and (= main_~c~0 0) .cse0 (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0)) (and .cse0 (= main_~c~0 9) (= main_~y~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= 7 main_~c~0) (= 7 main_~y~0) .cse1 (< 6 main_~k~0)) (and .cse0 (= main_~x~0 (+ .cse2 1)) (= main_~y~0 2) (< 1 main_~k~0) (= main_~c~0 2)) (and .cse0 .cse1 (< 2 main_~k~0) (= main_~c~0 3) (= main_~y~0 3)) (and (<= main_~c~0 4) .cse0 .cse1 (< 3 main_~k~0) (= main_~y~0 4) (<= 4 main_~c~0)) (and (<= main_~c~0 10) .cse0 (< 9 main_~k~0) .cse1 (= main_~y~0 10) (<= 10 main_~c~0)) (and .cse0 (= .cse3 (+ (* .cse2 4) 900)) (= main_~c~0 6) (= main_~y~0 6) (< 5 main_~k~0)) (and .cse0 (= main_~c~0 1) (= main_~y~0 1) (= .cse2 main_~x~0) (< 0 main_~k~0)) (and (= main_~y~0 8) .cse0 (< 7 main_~k~0) .cse1 (<= 8 main_~c~0) (<= main_~c~0 8)) (and (<= main_~c~0 5) (= 5 main_~y~0) .cse0 (<= 5 main_~c~0) .cse1 (< 4 main_~k~0))))) [2021-05-06 04:44:52,506 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-06 04:44:52,506 INFO L194 CegarLoopUtils]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse3 (* main_~x~0 4)) (.cse2 (* main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (<= main_~k~0 10)) (.cse1 (= .cse3 (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse2 2))))) (or (and (= main_~c~0 0) .cse0 (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0)) (and .cse0 (= main_~c~0 9) (= main_~y~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= 7 main_~c~0) (= 7 main_~y~0) .cse1 (< 6 main_~k~0)) (and .cse0 (= main_~x~0 (+ .cse2 1)) (= main_~y~0 2) (< 1 main_~k~0) (= main_~c~0 2)) (and .cse0 .cse1 (< 2 main_~k~0) (= main_~c~0 3) (= main_~y~0 3)) (and (<= main_~c~0 4) .cse0 .cse1 (< 3 main_~k~0) (= main_~y~0 4) (<= 4 main_~c~0)) (and (<= main_~c~0 10) .cse0 (< 9 main_~k~0) .cse1 (= main_~y~0 10) (<= 10 main_~c~0)) (and .cse0 (= .cse3 (+ (* .cse2 4) 900)) (= main_~c~0 6) (= main_~y~0 6) (< 5 main_~k~0)) (and .cse0 (= main_~c~0 1) (= main_~y~0 1) (= .cse2 main_~x~0) (< 0 main_~k~0)) (and (= main_~y~0 8) .cse0 (< 7 main_~k~0) .cse1 (<= 8 main_~c~0) (<= main_~c~0 8)) (and (<= main_~c~0 5) (= 5 main_~y~0) .cse0 (<= 5 main_~c~0) .cse1 (< 4 main_~k~0))))) [2021-05-06 04:44:52,506 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:44:52,506 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse1 (* main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (* main_~x~0 4) (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse1 2))))) (or (and (<= main_~k~0 6) (<= main_~c~0 6) .cse0 (= main_~y~0 6) (< 5 main_~k~0)) (and (<= main_~c~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0) (<= main_~k~0 5)) (and (<= main_~k~0 1) (= main_~y~0 1) (= .cse1 main_~x~0) (<= main_~c~0 1) (< 0 main_~k~0)) (and (= 7 main_~y~0) (<= main_~c~0 7) .cse0 (< 6 main_~k~0) (<= main_~k~0 7)) (and (<= main_~c~0 3) .cse0 (< 2 main_~k~0) (<= main_~k~0 3) (= main_~y~0 3)) (and (= main_~y~0 0) (= main_~x~0 0)) (and (<= main_~c~0 4) (<= main_~k~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4)) (and (= main_~y~0 8) (< 7 main_~k~0) .cse0 (<= main_~k~0 8) (<= main_~c~0 8)) (and (<= main_~c~0 2) (= main_~x~0 (+ .cse1 1)) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2)) (and (= main_~y~0 9) (<= main_~c~0 9) (< 8 main_~k~0) .cse0 (<= main_~k~0 9)) (and (<= main_~c~0 10) (<= main_~k~0 10) (< 9 main_~k~0) .cse0 (= main_~y~0 10))))) [2021-05-06 04:44:52,506 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-06 04:44:52,506 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-06 04:44:52,507 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:44:52,507 INFO L198 CegarLoopUtils]: For program point L38(line 38) no Hoare annotation was computed. [2021-05-06 04:44:52,507 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (= (* main_~x~0 4) (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2))) [2021-05-06 04:44:52,507 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-06 04:44:52,507 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-06 04:44:52,507 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-06 04:44:52,507 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:44:52,507 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:44:52,507 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-06 04:44:52,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:44:52 BoogieIcfgContainer [2021-05-06 04:44:52,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:44:52,519 INFO L168 Benchmark]: Toolchain (without parser) took 12461.28 ms. Allocated memory was 172.0 MB in the beginning and 317.7 MB in the end (delta: 145.8 MB). Free memory was 136.1 MB in the beginning and 263.9 MB in the end (delta: -127.8 MB). Peak memory consumption was 135.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:52,519 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 172.0 MB. Free memory is still 152.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:44:52,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.58 ms. Allocated memory is still 172.0 MB. Free memory was 135.9 MB in the beginning and 154.9 MB in the end (delta: -19.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:52,519 INFO L168 Benchmark]: Boogie Preprocessor took 29.49 ms. Allocated memory is still 172.0 MB. Free memory was 154.9 MB in the beginning and 153.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:52,519 INFO L168 Benchmark]: RCFGBuilder took 265.38 ms. Allocated memory is still 172.0 MB. Free memory was 153.3 MB in the beginning and 139.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:52,519 INFO L168 Benchmark]: TraceAbstraction took 11946.97 ms. Allocated memory was 172.0 MB in the beginning and 317.7 MB in the end (delta: 145.8 MB). Free memory was 138.6 MB in the beginning and 263.9 MB in the end (delta: -125.3 MB). Peak memory consumption was 137.4 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:52,520 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 172.0 MB. Free memory is still 152.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 215.58 ms. Allocated memory is still 172.0 MB. Free memory was 135.9 MB in the beginning and 154.9 MB in the end (delta: -19.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.49 ms. Allocated memory is still 172.0 MB. Free memory was 154.9 MB in the beginning and 153.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 265.38 ms. Allocated memory is still 172.0 MB. Free memory was 153.3 MB in the beginning and 139.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11946.97 ms. Allocated memory was 172.0 MB in the beginning and 317.7 MB in the end (delta: 145.8 MB). Free memory was 138.6 MB in the beginning and 263.9 MB in the end (delta: -125.3 MB). Peak memory consumption was 137.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10637.3ms, OverallIterations: 16, TraceHistogramMax: 13, EmptinessCheckTime: 18.6ms, AutomataDifference: 1735.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1229.6ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 545 SDtfs, 86 SDslu, 3536 SDs, 0 SdLazy, 2058 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1043.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 844 GetRequests, 686 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1157.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=15, InterpolantAutomatonStates: 162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 112.9ms AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 41 PreInvPairs, 78 NumberOfFragments, 996 HoareAnnotationTreeSize, 41 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 83.8ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 1577 FormulaSimplificationTreeSizeReductionInter, 1135.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 121.1ms SsaConstructionTime, 2261.5ms SatisfiabilityAnalysisTime, 2511.8ms InterpolantComputationTime, 842 NumberOfCodeBlocks, 824 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 826 ConstructedInterpolants, 0 QuantifiedInterpolants, 2821 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2764 ConjunctsInSsa, 376 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 1530/2208 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((((((((((c == 0 && k <= 10) && 0 <= k) && y == 0) && x == 0) || ((((k <= 10 && c == 9) && y == 9) && 8 < k) && x * 4 == y * y * y * y + y * y + y * y * y * 2)) || ((((k <= 10 && 7 == c) && 7 == y) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 6 < k)) || ((((k <= 10 && x == y * y * y + 1) && y == 2) && 1 < k) && c == 2)) || ((((k <= 10 && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 2 < k) && c == 3) && y == 3)) || (((((c <= 4 && k <= 10) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 3 < k) && y == 4) && 4 <= c)) || (((((c <= 10 && k <= 10) && 9 < k) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && y == 10) && 10 <= c)) || ((((k <= 10 && x * 4 == y * y * y * 4 + 900) && c == 6) && y == 6) && 5 < k)) || ((((k <= 10 && c == 1) && y == 1) && y * y * y == x) && 0 < k)) || (((((y == 8 && k <= 10) && 7 < k) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 8 <= c) && c <= 8)) || (((((c <= 5 && 5 == y) && k <= 10) && 5 <= c) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 4 < k) RESULT: Ultimate proved your program to be correct! Received shutdown request...