/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:45:01,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:45:01,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:45:01,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:45:01,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:45:01,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:45:01,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:45:01,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:45:01,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:45:01,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:45:01,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:45:01,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:45:01,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:45:01,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:45:01,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:45:01,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:45:01,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:45:01,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:45:01,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:45:01,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:45:01,870 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 04:45:01,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:45:01,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:45:01,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:45:01,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:45:01,910 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:45:01,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:45:01,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:45:01,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:45:01,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:45:01,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:45:01,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:45:01,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:45:01,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:45:01,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:45:01,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:45:01,912 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:45:01,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:45:01,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:45:01,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:45:01,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:45:01,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:45:01,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:45:01,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:45:01,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:45:01,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:45:01,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:45:01,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:45:01,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:45:01,913 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:45:02,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:45:02,180 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:45:02,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:45:02,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:45:02,182 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:45:02,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-05-06 04:45:02,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c056409ed/e077eaf5df4f4da9b0b38ed801c1f97f/FLAGc555ff66a [2021-05-06 04:45:02,628 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:45:02,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-05-06 04:45:02,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c056409ed/e077eaf5df4f4da9b0b38ed801c1f97f/FLAGc555ff66a [2021-05-06 04:45:02,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c056409ed/e077eaf5df4f4da9b0b38ed801c1f97f [2021-05-06 04:45:02,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:45:02,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:45:02,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:45:02,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:45:02,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:45:02,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e68f267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02, skipping insertion in model container [2021-05-06 04:45:02,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:45:02,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:45:02,785 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_valuebound20.c[458,471] [2021-05-06 04:45:02,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:45:02,803 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:45:02,812 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_valuebound20.c[458,471] [2021-05-06 04:45:02,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:45:02,850 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:45:02,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02 WrapperNode [2021-05-06 04:45:02,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:45:02,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:45:02,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:45:02,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:45:02,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (1/1) ... [2021-05-06 04:45:02,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:45:02,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:45:02,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:45:02,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:45:02,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (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 04:45:03,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:45:03,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:45:03,063 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:45:03,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:45:03,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:45:03,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:45:03,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:45:03,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:45:03,064 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:45:03,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:45:03,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:45:03,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:45:03,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:45:03,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:45:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:45:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:45:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:45:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:45:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:45:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:45:03,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:45:03,240 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:45:03,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:45:03 BoogieIcfgContainer [2021-05-06 04:45:03,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:45:03,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:45:03,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:45:03,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:45:03,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:45:02" (1/3) ... [2021-05-06 04:45:03,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42001ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:45:03, skipping insertion in model container [2021-05-06 04:45:03,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:45:02" (2/3) ... [2021-05-06 04:45:03,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42001ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:45:03, skipping insertion in model container [2021-05-06 04:45:03,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:45:03" (3/3) ... [2021-05-06 04:45:03,245 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2021-05-06 04:45:03,248 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:45:03,251 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:45:03,261 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:45:03,273 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:45:03,273 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:45:03,273 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:45:03,274 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:45:03,274 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:45:03,274 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:45:03,274 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:45:03,274 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:45:03,282 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 04:45:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:45:03,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:03,285 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 04:45:03,285 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:03,288 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-06 04:45:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:03,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975291358] [2021-05-06 04:45:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:03,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:45:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:03,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:45:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:03,502 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 04:45:03,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:03,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975291358] [2021-05-06 04:45:03,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975291358] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:45:03,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:45:03,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:45:03,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318041244] [2021-05-06 04:45:03,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:45:03,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:45:03,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:45:03,517 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 04:45:03,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:03,585 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-06 04:45:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:45:03,587 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 04:45:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:03,592 INFO L225 Difference]: With dead ends: 47 [2021-05-06 04:45:03,592 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 04:45:03,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:45:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 04:45:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 04:45:03,625 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 04:45:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 04:45:03,627 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 04:45:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:03,628 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 04:45:03,628 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 04:45:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 04:45:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:45:03,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:03,629 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 04:45:03,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:45:03,630 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:03,631 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-06 04:45:03,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:03,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380923399] [2021-05-06 04:45:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:03,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:03,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30490373] [2021-05-06 04:45:03,661 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 04:45:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:03,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:45:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:03,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:03,825 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 04:45:03,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:03,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380923399] [2021-05-06 04:45:03,825 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:03,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30490373] [2021-05-06 04:45:03,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30490373] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:45:03,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:45:03,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:45:03,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851011481] [2021-05-06 04:45:03,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:45:03,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:03,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:45:03,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:45:03,827 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 04:45:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:03,857 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:45:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:45:03,858 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 04:45:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:03,859 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:45:03,859 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 04:45:03,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:45:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 04:45:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 04:45:03,864 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 04:45:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 04:45:03,865 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 04:45:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:03,865 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 04:45:03,866 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 04:45:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 04:45:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:45:03,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:03,866 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 04:45:04,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:45:04,086 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:04,086 INFO L82 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2021-05-06 04:45:04,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:04,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313924646] [2021-05-06 04:45:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:04,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:04,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457759337] [2021-05-06 04:45:04,095 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 04:45:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:45:04,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:04,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,199 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 04:45:04,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313924646] [2021-05-06 04:45:04,199 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:04,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457759337] [2021-05-06 04:45:04,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457759337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:04,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:04,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:45:04,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114565434] [2021-05-06 04:45:04,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:45:04,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:04,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:45:04,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:45:04,200 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 04:45:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:04,236 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-06 04:45:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:45:04,236 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 04:45:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:04,237 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:45:04,237 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 04:45:04,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 04:45:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 04:45:04,242 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 04:45:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 04:45:04,243 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-06 04:45:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:04,243 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 04:45:04,243 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 04:45:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 04:45:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 04:45:04,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:04,244 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 04:45:04,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:04,460 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2021-05-06 04:45:04,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:04,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092173922] [2021-05-06 04:45:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:04,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:04,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734364455] [2021-05-06 04:45:04,474 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 04:45:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:45:04,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:04,686 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 04:45:04,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:04,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092173922] [2021-05-06 04:45:04,686 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:04,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734364455] [2021-05-06 04:45:04,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734364455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:04,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:04,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:45:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443602245] [2021-05-06 04:45:04,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:45:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:45:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:04,687 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 04:45:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:04,725 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-06 04:45:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:45:04,725 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 04:45:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:04,726 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:45:04,726 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 04:45:04,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:45:04,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 04:45:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 04:45:04,730 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 04:45:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 04:45:04,730 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-06 04:45:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:04,731 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 04:45:04,731 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 04:45:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 04:45:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 04:45:04,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:04,731 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 04:45:04,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:04,947 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -965543213, now seen corresponding path program 2 times [2021-05-06 04:45:04,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:04,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832179498] [2021-05-06 04:45:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:04,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:04,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409163066] [2021-05-06 04:45:04,955 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 04:45:05,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:45:05,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:45:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:05,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,103 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 04:45:05,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832179498] [2021-05-06 04:45:05,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409163066] [2021-05-06 04:45:05,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409163066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:05,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:05,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:45:05,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732617708] [2021-05-06 04:45:05,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:45:05,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:45:05,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:05,105 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 04:45:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:05,146 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-05-06 04:45:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:45:05,146 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 04:45:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:05,147 INFO L225 Difference]: With dead ends: 48 [2021-05-06 04:45:05,147 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:45:05,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:45:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:45:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:45:05,152 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 04:45:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-06 04:45:05,152 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-06 04:45:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:05,152 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-06 04:45:05,153 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 04:45:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-06 04:45:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 04:45:05,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:05,153 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 04:45:05,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:05,372 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 2 times [2021-05-06 04:45:05,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:05,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152924915] [2021-05-06 04:45:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:05,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:05,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813157903] [2021-05-06 04:45:05,381 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 04:45:05,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:45:05,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 04:45:05,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,551 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 04:45:05,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:05,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152924915] [2021-05-06 04:45:05,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:05,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813157903] [2021-05-06 04:45:05,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813157903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:05,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:05,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:45:05,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670615419] [2021-05-06 04:45:05,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:45:05,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:45:05,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:45:05,554 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 04:45:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:05,619 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-05-06 04:45:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:45:05,620 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 04:45:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:05,620 INFO L225 Difference]: With dead ends: 51 [2021-05-06 04:45:05,620 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:45:05,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:45:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:45:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:45:05,626 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 04:45:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 04:45:05,626 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-06 04:45:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:05,627 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 04:45:05,627 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 04:45:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 04:45:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 04:45:05,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:05,627 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 04:45:05,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 04:45:05,851 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:05,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:05,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1045939826, now seen corresponding path program 3 times [2021-05-06 04:45:05,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:05,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821712860] [2021-05-06 04:45:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:05,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:05,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657134992] [2021-05-06 04:45:05,858 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 04:45:05,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:45:05,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:05,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:45:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:05,977 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 04:45:05,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:05,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821712860] [2021-05-06 04:45:05,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:05,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657134992] [2021-05-06 04:45:05,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657134992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:05,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:05,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:45:05,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941278320] [2021-05-06 04:45:05,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:45:05,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:05,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:45:05,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:45:05,979 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 04:45:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:06,018 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-05-06 04:45:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:45:06,019 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 04:45:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:06,019 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:45:06,019 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:45:06,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:45:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:45:06,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:45:06,025 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 04:45:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 04:45:06,025 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2021-05-06 04:45:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:06,025 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 04:45:06,026 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 04:45:06,026 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 04:45:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:45:06,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:06,033 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 04:45:06,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:06,234 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:06,234 INFO L82 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 3 times [2021-05-06 04:45:06,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:06,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435546077] [2021-05-06 04:45:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:06,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:06,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458568184] [2021-05-06 04:45:06,244 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 04:45:06,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:45:06,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:06,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:45:06,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:06,572 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 04:45:06,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435546077] [2021-05-06 04:45:06,572 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458568184] [2021-05-06 04:45:06,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458568184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:06,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:06,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:45:06,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290140401] [2021-05-06 04:45:06,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:45:06,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:45:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:45:06,573 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 04:45:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:06,666 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-06 04:45:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:45:06,666 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 04:45:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:06,669 INFO L225 Difference]: With dead ends: 53 [2021-05-06 04:45:06,669 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 04:45:06,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:45:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 04:45:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 04:45:06,692 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 04:45:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-06 04:45:06,693 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-05-06 04:45:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:06,694 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-06 04:45:06,694 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 04:45:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-06 04:45:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 04:45:06,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:06,697 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 04:45:06,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:45:06,913 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 4 times [2021-05-06 04:45:06,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:06,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384109153] [2021-05-06 04:45:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:06,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:06,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544791208] [2021-05-06 04:45:06,919 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 04:45:06,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:45:06,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:07,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:45:07,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:07,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,206 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 04:45:07,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:07,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384109153] [2021-05-06 04:45:07,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:07,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544791208] [2021-05-06 04:45:07,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544791208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:07,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:07,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:45:07,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828153415] [2021-05-06 04:45:07,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:45:07,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:07,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:45:07,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:45:07,208 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 04:45:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:07,322 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-06 04:45:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:45:07,322 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 04:45:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:07,323 INFO L225 Difference]: With dead ends: 56 [2021-05-06 04:45:07,323 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 04:45:07,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:45:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 04:45:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 04:45:07,327 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 04:45:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-06 04:45:07,328 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2021-05-06 04:45:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:07,328 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-06 04:45:07,328 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 04:45:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-06 04:45:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 04:45:07,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:07,329 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 04:45:07,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 04:45:07,569 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 5 times [2021-05-06 04:45:07,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:07,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415959703] [2021-05-06 04:45:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:07,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:07,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652153477] [2021-05-06 04:45:07,576 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 04:45:07,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:45:07,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:07,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:45:07,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:07,917 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 04:45:07,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:07,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415959703] [2021-05-06 04:45:07,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:07,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652153477] [2021-05-06 04:45:07,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652153477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:07,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:07,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:45:07,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898051445] [2021-05-06 04:45:07,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:45:07,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:07,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:45:07,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:45:07,919 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 04:45:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:08,023 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-05-06 04:45:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:45:08,023 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 04:45:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:08,024 INFO L225 Difference]: With dead ends: 59 [2021-05-06 04:45:08,024 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 04:45:08,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:45:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 04:45:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 04:45:08,044 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 04:45:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-06 04:45:08,045 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2021-05-06 04:45:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:08,045 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-06 04:45:08,045 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 04:45:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-06 04:45:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 04:45:08,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:08,046 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 04:45:08,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:08,247 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 6 times [2021-05-06 04:45:08,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:08,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718341643] [2021-05-06 04:45:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:08,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:08,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517118958] [2021-05-06 04:45:08,254 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 04:45:08,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:45:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:08,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 04:45:08,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:08,599 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 04:45:08,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:08,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718341643] [2021-05-06 04:45:08,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517118958] [2021-05-06 04:45:08,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517118958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:08,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:08,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:45:08,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386536683] [2021-05-06 04:45:08,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:45:08,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:45:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:45:08,601 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 04:45:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:08,693 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-05-06 04:45:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:45:08,693 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 04:45:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:08,694 INFO L225 Difference]: With dead ends: 62 [2021-05-06 04:45:08,694 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 04:45:08,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:45:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 04:45:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 04:45:08,705 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 04:45:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-05-06 04:45:08,706 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 65 [2021-05-06 04:45:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:08,706 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-05-06 04:45:08,706 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 04:45:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-05-06 04:45:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 04:45:08,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:08,709 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 04:45:08,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:45:08,922 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 7 times [2021-05-06 04:45:08,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:08,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103239060] [2021-05-06 04:45:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:08,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:08,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768755261] [2021-05-06 04:45:08,928 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 04:45:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:45:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 04:45:09,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:09,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 04:45:09,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:09,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103239060] [2021-05-06 04:45:09,362 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:09,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768755261] [2021-05-06 04:45:09,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768755261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:09,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:09,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:45:09,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396076785] [2021-05-06 04:45:09,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:45:09,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:09,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:45:09,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:45:09,364 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:45:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:09,504 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-05-06 04:45:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 04:45:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2021-05-06 04:45:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:09,507 INFO L225 Difference]: With dead ends: 65 [2021-05-06 04:45:09,507 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 04:45:09,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:45:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 04:45:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 04:45:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:45:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 04:45:09,520 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 72 [2021-05-06 04:45:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:09,521 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 04:45:09,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:45:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 04:45:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 04:45:09,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:09,523 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 04:45:09,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 04:45:09,729 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 8 times [2021-05-06 04:45:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:09,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295058889] [2021-05-06 04:45:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:09,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:09,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411616769] [2021-05-06 04:45:09,764 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 04:45:10,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:45:10,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:10,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 04:45:10,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:10,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:10,516 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 04:45:10,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:10,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295058889] [2021-05-06 04:45:10,516 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:10,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411616769] [2021-05-06 04:45:10,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411616769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:10,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:10,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:45:10,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208250570] [2021-05-06 04:45:10,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:45:10,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:10,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:45:10,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:45:10,518 INFO L87 Difference]: Start difference. First operand 60 states and 65 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 04:45:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:10,654 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-05-06 04:45:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:45:10,654 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 04:45:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:10,657 INFO L225 Difference]: With dead ends: 68 [2021-05-06 04:45:10,657 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 04:45:10,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:45:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 04:45:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 04:45:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:45:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-05-06 04:45:10,663 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 79 [2021-05-06 04:45:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:10,663 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-05-06 04:45:10,663 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 04:45:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-05-06 04:45:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 04:45:10,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:10,664 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 04:45:10,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:10,869 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 9 times [2021-05-06 04:45:10,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:10,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315825776] [2021-05-06 04:45:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:10,887 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:10,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832829575] [2021-05-06 04:45:10,887 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 04:45:11,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:45:11,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 04:45:11,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:11,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:11,530 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 04:45:11,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:11,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315825776] [2021-05-06 04:45:11,530 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:11,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832829575] [2021-05-06 04:45:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832829575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:11,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:11,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:45:11,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872643715] [2021-05-06 04:45:11,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:45:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:11,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:45:11,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:45:11,531 INFO L87 Difference]: Start difference. First operand 63 states and 69 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 04:45:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:11,675 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-05-06 04:45:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 04:45:11,676 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 04:45:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:11,676 INFO L225 Difference]: With dead ends: 71 [2021-05-06 04:45:11,676 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 04:45:11,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:45:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 04:45:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-06 04:45:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:45:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-05-06 04:45:11,685 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 86 [2021-05-06 04:45:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:11,685 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-05-06 04:45:11,685 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 04:45:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-05-06 04:45:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 04:45:11,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:11,686 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 04:45:11,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 04:45:11,892 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:11,892 INFO L82 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 10 times [2021-05-06 04:45:11,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:11,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350757143] [2021-05-06 04:45:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:11,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:11,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654092804] [2021-05-06 04:45:11,903 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 04:45:12,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:45:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 04:45:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:12,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:12,965 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 04:45:12,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:12,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350757143] [2021-05-06 04:45:12,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:12,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654092804] [2021-05-06 04:45:12,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654092804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:12,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:12,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:45:12,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881094954] [2021-05-06 04:45:12,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:45:12,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:45:12,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:45:12,968 INFO L87 Difference]: Start difference. First operand 66 states and 73 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 04:45:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:13,126 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-05-06 04:45:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:45:13,127 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 04:45:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:13,127 INFO L225 Difference]: With dead ends: 74 [2021-05-06 04:45:13,127 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 04:45:13,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:45:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 04:45:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 04:45:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:45:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-05-06 04:45:13,134 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 93 [2021-05-06 04:45:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:13,134 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-05-06 04:45:13,135 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 04:45:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-05-06 04:45:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 04:45:13,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:13,136 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 04:45:13,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:13,341 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:13,341 INFO L82 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 11 times [2021-05-06 04:45:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:13,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975975129] [2021-05-06 04:45:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:13,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:13,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056625395] [2021-05-06 04:45:13,349 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 04:45:13,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:45:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 04:45:13,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:13,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 04:45:13,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975975129] [2021-05-06 04:45:13,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056625395] [2021-05-06 04:45:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056625395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:13,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:13,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:45:13,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882571280] [2021-05-06 04:45:13,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:45:13,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:45:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:45:13,914 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:45:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:14,106 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-05-06 04:45:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 04:45:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2021-05-06 04:45:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:14,107 INFO L225 Difference]: With dead ends: 77 [2021-05-06 04:45:14,107 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 04:45:14,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:45:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 04:45:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-06 04:45:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 17 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:45:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-05-06 04:45:14,112 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 100 [2021-05-06 04:45:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:14,113 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-05-06 04:45:14,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:45:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-05-06 04:45:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 04:45:14,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:14,113 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:14,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 04:45:14,318 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 12 times [2021-05-06 04:45:14,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:14,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468686538] [2021-05-06 04:45:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:14,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:14,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717708605] [2021-05-06 04:45:14,323 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:14,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:45:14,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 04:45:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:14,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:14,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:22,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:22,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:22,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:22,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:22,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 87 proven. 239 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-06 04:46:22,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468686538] [2021-05-06 04:46:22,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:22,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717708605] [2021-05-06 04:46:22,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717708605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:22,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:22,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 04:46:22,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712501330] [2021-05-06 04:46:22,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 04:46:22,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:22,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 04:46:22,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:46:22,995 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 04:46:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:23,719 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-05-06 04:46:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 04:46:23,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2021-05-06 04:46:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:23,720 INFO L225 Difference]: With dead ends: 80 [2021-05-06 04:46:23,720 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 04:46:23,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68006.2ms TimeCoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-05-06 04:46:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 04:46:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 04:46:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 18 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:46:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-05-06 04:46:23,727 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 107 [2021-05-06 04:46:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:23,727 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-05-06 04:46:23,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 04:46:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-05-06 04:46:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 04:46:23,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:23,728 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:23,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 04:46:23,934 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:23,935 INFO L82 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 13 times [2021-05-06 04:46:23,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:23,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738358159] [2021-05-06 04:46:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:23,940 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:23,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353553976] [2021-05-06 04:46:23,940 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:46:24,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 04:46:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:24,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 04:46:24,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:24,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738358159] [2021-05-06 04:46:24,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:24,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353553976] [2021-05-06 04:46:24,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353553976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:24,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:24,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 04:46:24,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997500019] [2021-05-06 04:46:24,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 04:46:24,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:24,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 04:46:24,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:46:24,906 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 04:46:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:25,474 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-05-06 04:46:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 04:46:25,475 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2021-05-06 04:46:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:25,475 INFO L225 Difference]: With dead ends: 83 [2021-05-06 04:46:25,475 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 04:46:25,476 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-05-06 04:46:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 04:46:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 04:46:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 19 states have call successors, (19), 8 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:46:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2021-05-06 04:46:25,482 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 114 [2021-05-06 04:46:25,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:25,484 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2021-05-06 04:46:25,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 04:46:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2021-05-06 04:46:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 04:46:25,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:25,485 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:25,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:25,691 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 14 times [2021-05-06 04:46:25,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:25,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353797996] [2021-05-06 04:46:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:25,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:25,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739186868] [2021-05-06 04:46:25,695 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:26,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:46:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:26,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 04:46:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:26,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 04:46:26,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:26,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353797996] [2021-05-06 04:46:26,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:26,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739186868] [2021-05-06 04:46:26,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739186868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:26,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:26,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:46:26,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053918775] [2021-05-06 04:46:26,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:46:26,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:26,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:46:26,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:46:26,715 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 04:46:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:27,269 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2021-05-06 04:46:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:46:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2021-05-06 04:46:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:27,271 INFO L225 Difference]: With dead ends: 86 [2021-05-06 04:46:27,271 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 04:46:27,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 343.3ms TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:46:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 04:46:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 04:46:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 20 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:46:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-05-06 04:46:27,277 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 121 [2021-05-06 04:46:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:27,277 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-05-06 04:46:27,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 04:46:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-05-06 04:46:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 04:46:27,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:27,278 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:27,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 04:46:27,479 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 15 times [2021-05-06 04:46:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:27,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167782885] [2021-05-06 04:46:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:27,485 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:27,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618029805] [2021-05-06 04:46:27,486 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:28,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:46:28,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 04:46:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:28,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 114 proven. 362 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 04:46:28,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:28,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167782885] [2021-05-06 04:46:28,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:28,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618029805] [2021-05-06 04:46:28,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618029805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:28,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:28,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-06 04:46:28,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67945048] [2021-05-06 04:46:28,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 04:46:28,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:28,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 04:46:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2021-05-06 04:46:28,659 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 18 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 04:46:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:29,498 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2021-05-06 04:46:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 04:46:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 18 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2021-05-06 04:46:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:29,499 INFO L225 Difference]: With dead ends: 93 [2021-05-06 04:46:29,499 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 04:46:29,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:46:29,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 04:46:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-06 04:46:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 21 states have call successors, (21), 9 states have call predecessors, (21), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 04:46:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2021-05-06 04:46:29,506 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 128 [2021-05-06 04:46:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:29,506 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2021-05-06 04:46:29,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 18 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 04:46:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2021-05-06 04:46:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 04:46:29,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:29,507 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:29,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 04:46:29,714 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 16 times [2021-05-06 04:46:29,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:29,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070219951] [2021-05-06 04:46:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:29,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:29,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330483553] [2021-05-06 04:46:29,719 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:30,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:46:30,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 04:46:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:30,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 04:46:30,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:30,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070219951] [2021-05-06 04:46:30,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:30,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330483553] [2021-05-06 04:46:30,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330483553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:30,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:30,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 04:46:30,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717488269] [2021-05-06 04:46:30,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 04:46:30,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:30,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 04:46:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:46:30,802 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 04:46:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:31,460 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-05-06 04:46:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:46:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2021-05-06 04:46:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:31,462 INFO L225 Difference]: With dead ends: 96 [2021-05-06 04:46:31,462 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 04:46:31,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:46:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 04:46:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-06 04:46:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 22 states have call successors, (22), 9 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 04:46:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2021-05-06 04:46:31,471 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 135 [2021-05-06 04:46:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:31,472 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2021-05-06 04:46:31,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 04:46:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2021-05-06 04:46:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-06 04:46:31,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:31,474 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:31,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 04:46:31,679 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 17 times [2021-05-06 04:46:31,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:31,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786611354] [2021-05-06 04:46:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:31,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:31,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841034508] [2021-05-06 04:46:31,685 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:35,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 04:46:35,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:35,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 04:46:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:36,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-05-06 04:46:36,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786611354] [2021-05-06 04:46:36,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841034508] [2021-05-06 04:46:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841034508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:36,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:36,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 04:46:36,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455133491] [2021-05-06 04:46:36,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 04:46:36,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 04:46:36,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-05-06 04:46:36,189 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 04:46:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:36,679 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2021-05-06 04:46:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 04:46:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2021-05-06 04:46:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:36,680 INFO L225 Difference]: With dead ends: 99 [2021-05-06 04:46:36,680 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 04:46:36,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2021-05-06 04:46:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 04:46:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 04:46:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 23 states have call successors, (23), 9 states have call predecessors, (23), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 04:46:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-05-06 04:46:36,686 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 142 [2021-05-06 04:46:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:36,687 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-05-06 04:46:36,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 04:46:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-05-06 04:46:36,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 04:46:36,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:36,687 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:36,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 04:46:36,895 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 18 times [2021-05-06 04:46:36,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:36,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748221983] [2021-05-06 04:46:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:36,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:36,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645218244] [2021-05-06 04:46:36,924 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:37,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 04:46:37,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-06 04:46:37,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:37,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-05-06 04:46:37,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:37,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748221983] [2021-05-06 04:46:37,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:37,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645218244] [2021-05-06 04:46:37,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645218244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:37,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:37,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 04:46:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820321732] [2021-05-06 04:46:37,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 04:46:37,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 04:46:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:46:37,900 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 04:46:38,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:38,445 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-05-06 04:46:38,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 04:46:38,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2021-05-06 04:46:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:38,446 INFO L225 Difference]: With dead ends: 102 [2021-05-06 04:46:38,446 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 04:46:38,446 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:46:38,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 04:46:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-06 04:46:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 24 states have call successors, (24), 9 states have call predecessors, (24), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 04:46:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2021-05-06 04:46:38,453 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 149 [2021-05-06 04:46:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:38,453 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2021-05-06 04:46:38,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 04:46:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2021-05-06 04:46:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 04:46:38,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:38,454 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:38,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:38,659 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:38,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 19 times [2021-05-06 04:46:38,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:38,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109164346] [2021-05-06 04:46:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:38,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:38,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973627134] [2021-05-06 04:46:38,665 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:46:39,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 04:46:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:39,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-05-06 04:46:39,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109164346] [2021-05-06 04:46:39,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:39,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973627134] [2021-05-06 04:46:39,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973627134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:39,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:39,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-06 04:46:39,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37769790] [2021-05-06 04:46:39,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 04:46:39,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:39,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 04:46:39,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-05-06 04:46:39,933 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 04:46:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:40,510 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-05-06 04:46:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 04:46:40,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2021-05-06 04:46:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:40,511 INFO L225 Difference]: With dead ends: 105 [2021-05-06 04:46:40,511 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 04:46:40,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2021-05-06 04:46:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 04:46:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 04:46:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 25 states have call successors, (25), 9 states have call predecessors, (25), 7 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 04:46:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-05-06 04:46:40,518 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 156 [2021-05-06 04:46:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:40,518 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-05-06 04:46:40,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 04:46:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-05-06 04:46:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-06 04:46:40,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:40,519 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:40,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 04:46:40,719 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 20 times [2021-05-06 04:46:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:40,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489733945] [2021-05-06 04:46:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:40,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:40,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739203314] [2021-05-06 04:46:40,748 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:41,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:46:41,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-06 04:46:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:41,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:41,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-05-06 04:46:42,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:42,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489733945] [2021-05-06 04:46:42,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:42,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739203314] [2021-05-06 04:46:42,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739203314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:42,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:42,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 04:46:42,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345763734] [2021-05-06 04:46:42,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 04:46:42,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 04:46:42,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:46:42,222 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 22 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 04:46:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:42,920 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2021-05-06 04:46:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 04:46:42,921 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 22 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2021-05-06 04:46:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:42,921 INFO L225 Difference]: With dead ends: 108 [2021-05-06 04:46:42,921 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 04:46:42,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 393.1ms TimeCoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-05-06 04:46:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 04:46:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 04:46:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 9 states have call predecessors, (26), 7 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 04:46:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-05-06 04:46:42,928 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 163 [2021-05-06 04:46:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:42,928 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-05-06 04:46:42,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 22 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 04:46:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-05-06 04:46:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 04:46:42,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:42,929 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:43,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:43,130 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:43,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:43,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 21 times [2021-05-06 04:46:43,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:43,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904856404] [2021-05-06 04:46:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:43,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:43,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708221922] [2021-05-06 04:46:43,135 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:43,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-06 04:46:43,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:43,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 04:46:43,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:43,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:43,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 819 proven. 0 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2021-05-06 04:46:44,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904856404] [2021-05-06 04:46:44,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708221922] [2021-05-06 04:46:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708221922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:46:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:46:44,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-06 04:46:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723249810] [2021-05-06 04:46:44,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 04:46:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 04:46:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:46:44,312 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 04:46:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:44,459 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2021-05-06 04:46:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 04:46:44,460 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2021-05-06 04:46:44,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:44,460 INFO L225 Difference]: With dead ends: 107 [2021-05-06 04:46:44,460 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 04:46:44,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2021-05-06 04:46:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 04:46:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 04:46:44,461 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 04:46:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 04:46:44,461 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-05-06 04:46:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:44,461 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 04:46:44,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 04:46:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 04:46:44,461 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 04:46:44,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 04:46:44,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 04:46:45,673 WARN L205 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 134 [2021-05-06 04:46:46,307 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 142 [2021-05-06 04:46:47,096 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 134 [2021-05-06 04:46:47,139 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 04:46:47,139 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 04:46:47,139 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 04:46:47,139 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:46:47,139 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 04:46:47,139 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:46:47,139 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 04:46:47,139 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 04:46:47,140 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 04:46:47,140 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 04:46:47,140 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-06 04:46:47,140 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-06 04:46:47,140 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:46:47,140 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-06 04:46:47,140 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2021-05-06 04:46:47,140 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 (= .cse3 (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse2 2)))) (.cse1 (<= main_~k~0 20))) (or (and (< 15 main_~k~0) .cse0 .cse1 (= main_~y~0 16) (= main_~c~0 16)) (and (< 12 main_~k~0) (= main_~c~0 13) .cse0 (= main_~y~0 13) .cse1) (and (< 11 main_~k~0) (= main_~y~0 12) (<= main_~c~0 12) .cse0 (<= 12 main_~c~0) .cse1) (and (<= main_~c~0 5) (= 5 main_~y~0) (<= 5 main_~c~0) .cse0 (< 4 main_~k~0) .cse1) (and (= main_~c~0 6) .cse0 (= main_~y~0 6) .cse1 (< 5 main_~k~0)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (< 13 main_~k~0) (= main_~y~0 14) .cse0 (= main_~c~0 14) .cse1) (and (= 7 main_~c~0) (= 7 main_~y~0) .cse0 .cse1 (< 6 main_~k~0)) (and .cse0 (= main_~y~0 17) (< 16 main_~k~0) (= main_~c~0 17) .cse1) (and (< 17 main_~k~0) (= main_~y~0 18) (<= main_~c~0 18) .cse0 (<= 18 main_~c~0) .cse1) (and (= main_~x~0 (+ .cse2 1)) (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~y~0 8) (< 7 main_~k~0) .cse0 (<= 8 main_~c~0) .cse1 (<= main_~c~0 8)) (and (< 14 main_~k~0) (= main_~c~0 15) (= main_~y~0 15) .cse1 (= .cse3 (+ (* .cse2 4) 44100))) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) (<= 4 main_~c~0) .cse1) (and (= main_~c~0 9) (= main_~y~0 9) (< 8 main_~k~0) .cse0 .cse1) (and (= main_~c~0 1) (= main_~y~0 1) (= .cse2 main_~x~0) .cse1 (< main_~c~0 (+ main_~k~0 1))) (and (< 9 main_~k~0) (= main_~c~0 10) .cse0 (= main_~y~0 10) .cse1) (and (= 19 main_~y~0) (<= 19 main_~c~0) .cse0 (< 18 main_~k~0) .cse1 (<= main_~c~0 19)) (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3)) (and (= main_~y~0 11) (<= 11 main_~c~0) (< 10 main_~k~0) .cse0 (<= main_~c~0 11) .cse1) (and (< 19 main_~k~0) (= main_~y~0 20) .cse0 .cse1 (<= 20 main_~c~0))))) [2021-05-06 04:46:47,140 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-06 04:46:47,141 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 (= .cse3 (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* .cse2 2)))) (.cse1 (<= main_~k~0 20))) (or (and (< 15 main_~k~0) .cse0 .cse1 (= main_~y~0 16) (= main_~c~0 16)) (and (< 12 main_~k~0) (= main_~c~0 13) .cse0 (= main_~y~0 13) .cse1) (and (< 11 main_~k~0) (= main_~y~0 12) (<= main_~c~0 12) .cse0 (<= 12 main_~c~0) .cse1) (and (<= main_~c~0 5) (= 5 main_~y~0) (<= 5 main_~c~0) .cse0 (< 4 main_~k~0) .cse1) (and (= main_~c~0 6) .cse0 (= main_~y~0 6) .cse1 (< 5 main_~k~0)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (< 13 main_~k~0) (= main_~y~0 14) .cse0 (= main_~c~0 14) .cse1) (and (= 7 main_~c~0) (= 7 main_~y~0) .cse0 .cse1 (< 6 main_~k~0)) (and .cse0 (= main_~y~0 17) (< 16 main_~k~0) (= main_~c~0 17) .cse1) (and (< 17 main_~k~0) (= main_~y~0 18) (<= main_~c~0 18) .cse0 (<= 18 main_~c~0) .cse1) (and (= main_~x~0 (+ .cse2 1)) (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~y~0 8) (< 7 main_~k~0) .cse0 (<= 8 main_~c~0) .cse1 (<= main_~c~0 8)) (and (< 14 main_~k~0) (= main_~c~0 15) (= main_~y~0 15) .cse1 (= .cse3 (+ (* .cse2 4) 44100))) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) (<= 4 main_~c~0) .cse1) (and (= main_~c~0 9) (= main_~y~0 9) (< 8 main_~k~0) .cse0 .cse1) (and (= main_~c~0 1) (= main_~y~0 1) (= .cse2 main_~x~0) .cse1 (< main_~c~0 (+ main_~k~0 1))) (and (< 9 main_~k~0) (= main_~c~0 10) .cse0 (= main_~y~0 10) .cse1) (and (= 19 main_~y~0) (<= 19 main_~c~0) .cse0 (< 18 main_~k~0) .cse1 (<= main_~c~0 19)) (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3)) (and (= main_~y~0 11) (<= 11 main_~c~0) (< 10 main_~k~0) .cse0 (<= main_~c~0 11) .cse1) (and (< 19 main_~k~0) (= main_~y~0 20) .cse0 .cse1 (<= 20 main_~c~0))))) [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:46:47,141 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse2 (* main_~x~0 4)) (.cse1 (* main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= .cse2 (+ (* 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_~k~0 1) (= main_~y~0 1) (= .cse1 main_~x~0) (<= main_~c~0 1) (< 0 main_~k~0)) (and (< 17 main_~k~0) (<= main_~k~0 18) (= main_~y~0 18) (<= main_~c~0 18) .cse0) (and (= 7 main_~y~0) (<= main_~c~0 7) .cse0 (< 6 main_~k~0) (<= main_~k~0 7)) (and (< 11 main_~k~0) (= main_~y~0 12) (<= main_~c~0 12) (<= main_~k~0 12) .cse0) (and (<= main_~c~0 3) .cse0 (< 2 main_~k~0) (<= main_~k~0 3) (= main_~y~0 3)) (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 (< 14 main_~k~0) (<= main_~c~0 15) (<= main_~k~0 15) (= main_~y~0 15) (= .cse2 (+ (* .cse1 4) 44100))) (and (< 13 main_~k~0) (<= main_~k~0 14) (= main_~y~0 14) (<= main_~c~0 14) .cse0) (and (<= main_~c~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0) (<= main_~k~0 5)) (and (< 15 main_~k~0) .cse0 (<= main_~k~0 16) (<= main_~c~0 16) (= main_~y~0 16)) (and (= main_~y~0 11) (<= main_~k~0 11) (< 10 main_~k~0) .cse0 (<= main_~c~0 11)) (and (= main_~y~0 0) (= main_~x~0 0)) (and (< 19 main_~k~0) (= main_~y~0 20) .cse0 (<= main_~k~0 20)) (and (= 19 main_~y~0) .cse0 (< 18 main_~k~0) (<= main_~k~0 19) (<= main_~c~0 19)) (and .cse0 (<= main_~c~0 17) (= main_~y~0 17) (< 16 main_~k~0) (<= main_~k~0 17)) (and (<= main_~c~0 4) (<= main_~k~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4)) (and (< 12 main_~k~0) .cse0 (<= main_~c~0 13) (= main_~y~0 13) (<= main_~k~0 13)) (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 04:46:47,141 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point L38(line 38) no Hoare annotation was computed. [2021-05-06 04:46:47,141 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 04:46:47,141 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-06 04:46:47,141 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-06 04:46:47,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:46:47 BoogieIcfgContainer [2021-05-06 04:46:47,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:46:47,174 INFO L168 Benchmark]: Toolchain (without parser) took 104525.00 ms. Allocated memory was 250.6 MB in the beginning and 441.5 MB in the end (delta: 190.8 MB). Free memory was 214.5 MB in the beginning and 251.2 MB in the end (delta: -36.7 MB). Peak memory consumption was 249.5 MB. Max. memory is 8.0 GB. [2021-05-06 04:46:47,174 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 250.6 MB. Free memory was 230.8 MB in the beginning and 230.7 MB in the end (delta: 82.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:46:47,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.77 ms. Allocated memory is still 250.6 MB. Free memory was 214.4 MB in the beginning and 231.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-06 04:46:47,174 INFO L168 Benchmark]: Boogie Preprocessor took 66.33 ms. Allocated memory is still 250.6 MB. Free memory was 231.9 MB in the beginning and 232.5 MB in the end (delta: -617.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 04:46:47,174 INFO L168 Benchmark]: RCFGBuilder took 322.53 ms. Allocated memory is still 250.6 MB. Free memory was 232.5 MB in the beginning and 217.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 04:46:47,174 INFO L168 Benchmark]: TraceAbstraction took 103932.18 ms. Allocated memory was 250.6 MB in the beginning and 441.5 MB in the end (delta: 190.8 MB). Free memory was 217.3 MB in the beginning and 251.2 MB in the end (delta: -33.8 MB). Peak memory consumption was 251.4 MB. Max. memory is 8.0 GB. [2021-05-06 04:46:47,175 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 250.6 MB. Free memory was 230.8 MB in the beginning and 230.7 MB in the end (delta: 82.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 198.77 ms. Allocated memory is still 250.6 MB. Free memory was 214.4 MB in the beginning and 231.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.33 ms. Allocated memory is still 250.6 MB. Free memory was 231.9 MB in the beginning and 232.5 MB in the end (delta: -617.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.53 ms. Allocated memory is still 250.6 MB. Free memory was 232.5 MB in the beginning and 217.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 103932.18 ms. Allocated memory was 250.6 MB in the beginning and 441.5 MB in the end (delta: 190.8 MB). Free memory was 217.3 MB in the beginning and 251.2 MB in the end (delta: -33.8 MB). Peak memory consumption was 251.4 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: 101394.8ms, OverallIterations: 26, TraceHistogramMax: 23, EmptinessCheckTime: 31.7ms, AutomataDifference: 7367.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 2471.7ms, InitialAbstractionConstructionTime: 6.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1234 SDtfs, 140 SDslu, 13704 SDs, 0 SdLazy, 9622 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5436.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2240 GetRequests, 1850 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 72071.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=25, InterpolantAutomatonStates: 392, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 210.9ms AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 61 PreInvPairs, 128 NumberOfFragments, 1968 HoareAnnotationTreeSize, 61 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 143.0ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 2848 FormulaSimplificationTreeSizeReductionInter, 2318.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 295.1ms SsaConstructionTime, 11683.1ms SatisfiabilityAnalysisTime, 75361.8ms InterpolantComputationTime, 2227 NumberOfCodeBlocks, 2204 NumberOfCodeBlocksAsserted, 149 NumberOfCheckSat, 2201 ConstructedInterpolants, 0 QuantifiedInterpolants, 8441 SizeOfPredicates, 53 NumberOfNonLiveVariables, 6644 ConjunctsInSsa, 1083 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 8316/12953 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: (((((((((((((((((((((((15 < k && x * 4 == y * y * y * y + y * y + y * y * y * 2) && k <= 20) && y == 16) && c == 16) || ((((12 < k && c == 13) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && y == 13) && k <= 20)) || (((((11 < k && y == 12) && c <= 12) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 12 <= c) && k <= 20)) || (((((c <= 5 && 5 == y) && 5 <= c) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 4 < k) && k <= 20)) || ((((c == 6 && x * 4 == y * y * y * y + y * y + y * y * y * 2) && y == 6) && k <= 20) && 5 < k)) || ((((c == 0 && 0 <= k) && y == 0) && x == 0) && k <= 20)) || ((((13 < k && y == 14) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && c == 14) && k <= 20)) || ((((7 == c && 7 == y) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && k <= 20) && 6 < k)) || ((((x * 4 == y * y * y * y + y * y + y * y * y * 2 && y == 17) && 16 < k) && c == 17) && k <= 20)) || (((((17 < k && y == 18) && c <= 18) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 18 <= c) && k <= 20)) || ((((x == y * y * y + 1 && y == 2) && 1 < k) && k <= 20) && c == 2)) || (((((y == 8 && 7 < k) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 8 <= c) && k <= 20) && c <= 8)) || ((((14 < k && c == 15) && y == 15) && k <= 20) && x * 4 == y * y * y * 4 + 44100)) || (((((c <= 4 && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 3 < k) && y == 4) && 4 <= c) && k <= 20)) || ((((c == 9 && y == 9) && 8 < k) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && k <= 20)) || ((((c == 1 && y == 1) && y * y * y == x) && k <= 20) && c < k + 1)) || ((((9 < k && c == 10) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && y == 10) && k <= 20)) || (((((19 == y && 19 <= c) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && 18 < k) && k <= 20) && c <= 19)) || ((((x * 4 == y * y * y * y + y * y + y * y * y * 2 && 2 < k) && k <= 20) && c == 3) && y == 3)) || (((((y == 11 && 11 <= c) && 10 < k) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && c <= 11) && k <= 20)) || ((((19 < k && y == 20) && x * 4 == y * y * y * y + y * y + y * y * y * 2) && k <= 20) && 20 <= c) RESULT: Ultimate proved your program to be correct! Received shutdown request...