/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/geo2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:49:32,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:49:32,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:49:32,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:49:32,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:49:32,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:49:32,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:49:32,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:49:32,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:49:32,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:49:32,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:49:32,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:49:32,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:49:32,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:49:32,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:49:32,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:49:32,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:49:32,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:49:32,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:49:32,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:49:32,126 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 02:49:32,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:49:32,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:49:32,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:49:32,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:49:32,140 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:49:32,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:49:32,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:49:32,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:49:32,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:49:32,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:49:32,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:49:32,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:49:32,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:49:32,142 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:49:32,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:49:32,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:49:32,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:49:32,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:49:32,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:49:32,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:49:32,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:49:32,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:49:32,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:49:32,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:49:32,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:49:32,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:49:32,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:49:32,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:49:32,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:49:32,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:49:32,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:49:32,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:49:32,374 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:49:32,375 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:49:32,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound100.c [2021-05-06 02:49:32,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b21354cd/5842621e169e4d42860f28a486bcc703/FLAG041fe48fd [2021-05-06 02:49:32,715 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:49:32,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound100.c [2021-05-06 02:49:32,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b21354cd/5842621e169e4d42860f28a486bcc703/FLAG041fe48fd [2021-05-06 02:49:33,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b21354cd/5842621e169e4d42860f28a486bcc703 [2021-05-06 02:49:33,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:49:33,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:49:33,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:49:33,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:49:33,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:49:33,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba92209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33, skipping insertion in model container [2021-05-06 02:49:33,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:49:33,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:49:33,257 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/geo2-ll_valuebound100.c[525,538] [2021-05-06 02:49:33,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:49:33,270 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:49:33,278 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/geo2-ll_valuebound100.c[525,538] [2021-05-06 02:49:33,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:49:33,313 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:49:33,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33 WrapperNode [2021-05-06 02:49:33,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:49:33,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:49:33,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:49:33,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:49:33,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (1/1) ... [2021-05-06 02:49:33,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:49:33,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:49:33,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:49:33,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:49:33,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (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 02:49:33,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:49:33,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:49:33,396 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:49:33,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:49:33,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:49:33,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:49:33,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:49:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:49:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:49:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:49:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:49:33,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:49:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:49:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:49:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:49:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:49:33,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:49:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:49:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:49:33,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:49:33,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:49:33,597 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:49:33,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:49:33 BoogieIcfgContainer [2021-05-06 02:49:33,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:49:33,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:49:33,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:49:33,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:49:33,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:49:33" (1/3) ... [2021-05-06 02:49:33,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9310c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:49:33, skipping insertion in model container [2021-05-06 02:49:33,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:33" (2/3) ... [2021-05-06 02:49:33,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9310c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:49:33, skipping insertion in model container [2021-05-06 02:49:33,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:49:33" (3/3) ... [2021-05-06 02:49:33,603 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound100.c [2021-05-06 02:49:33,606 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:49:33,609 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:49:33,619 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:49:33,633 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:49:33,633 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:49:33,633 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:49:33,633 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:49:33,633 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:49:33,633 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:49:33,633 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:49:33,633 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:49:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 02:49:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:49:33,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:33,647 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] [2021-05-06 02:49:33,648 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:33,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1276201559, now seen corresponding path program 1 times [2021-05-06 02:49:33,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:33,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772806260] [2021-05-06 02:49:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:33,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:49:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:33,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:49:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:33,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:49:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:49:33,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:33,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772806260] [2021-05-06 02:49:33,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772806260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:49:33,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:49:33,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:49:33,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020787231] [2021-05-06 02:49:33,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:49:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:49:33,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:49:33,941 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:49:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:34,004 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-06 02:49:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:49:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:49:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:34,011 INFO L225 Difference]: With dead ends: 51 [2021-05-06 02:49:34,011 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 02:49:34,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:49:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 02:49:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 02:49:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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 02:49:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 02:49:34,037 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-06 02:49:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:34,037 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 02:49:34,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:49:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 02:49:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:49:34,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:34,038 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] [2021-05-06 02:49:34,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:49:34,039 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:34,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1874219407, now seen corresponding path program 1 times [2021-05-06 02:49:34,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:34,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418086594] [2021-05-06 02:49:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:34,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:34,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732746716] [2021-05-06 02:49:34,060 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 02:49:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:49:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:34,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:49:34,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:34,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418086594] [2021-05-06 02:49:34,283 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:34,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732746716] [2021-05-06 02:49:34,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732746716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:49:34,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:49:34,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:49:34,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255378562] [2021-05-06 02:49:34,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:49:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:49:34,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:49:34,285 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:49:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:34,337 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 02:49:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:49:34,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:49:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:34,339 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:49:34,339 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:49:34,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:49:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 02:49:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 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 02:49:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 02:49:34,345 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-06 02:49:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:34,346 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 02:49:34,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:49:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 02:49:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:49:34,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:34,347 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:34,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:49:34,566 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash 156588053, now seen corresponding path program 1 times [2021-05-06 02:49:34,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:34,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590096838] [2021-05-06 02:49:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:34,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:34,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742915091] [2021-05-06 02:49:34,587 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 02:49:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:34,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:49:34,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:34,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:34,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:34,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:49:34,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:34,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590096838] [2021-05-06 02:49:34,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:34,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742915091] [2021-05-06 02:49:34,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742915091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:34,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:34,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:49:34,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679610169] [2021-05-06 02:49:34,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:49:34,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:49:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:34,828 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:49:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:34,901 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 02:49:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:49:34,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 02:49:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:34,903 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:49:34,903 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:49:34,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:49:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:49:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 02:49:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 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 02:49:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-06 02:49:34,910 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-06 02:49:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:34,910 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-06 02:49:34,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:49:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-06 02:49:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:49:34,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:34,911 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:35,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:35,112 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1865789967, now seen corresponding path program 2 times [2021-05-06 02:49:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310918005] [2021-05-06 02:49:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:35,130 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:35,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516083109] [2021-05-06 02:49:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:35,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:49:35,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:49:35,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:49:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:35,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 02:49:35,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310918005] [2021-05-06 02:49:35,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:35,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516083109] [2021-05-06 02:49:35,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516083109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:35,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:35,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:49:35,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332673895] [2021-05-06 02:49:35,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:49:35,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:49:35,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:49:35,582 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:50:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:50:37,955 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-06 02:50:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:50:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 02:50:37,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:50:37,956 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:50:37,956 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 02:50:37,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:50:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 02:50:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 02:50:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 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 02:50:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-06 02:50:37,966 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2021-05-06 02:50:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:50:37,966 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-06 02:50:37,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:50:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-06 02:50:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:50:37,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:50:37,967 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:50:38,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:50:38,168 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:50:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:50:38,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1145718933, now seen corresponding path program 3 times [2021-05-06 02:50:38,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:50:38,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577894665] [2021-05-06 02:50:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:50:38,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:50:38,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421424854] [2021-05-06 02:50:38,185 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 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 02:50:38,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:50:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:50:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:50:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:50:38,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:50:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 02:50:38,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:50:38,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577894665] [2021-05-06 02:50:38,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:50:38,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421424854] [2021-05-06 02:50:38,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421424854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:50:38,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:50:38,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:50:38,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104897826] [2021-05-06 02:50:38,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:50:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:50:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:50:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:50:38,480 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5)