/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/cohendiv-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:12:32,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:12:32,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:12:32,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:12:32,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:12:32,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:12:32,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:12:32,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:12:32,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:12:32,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:12:32,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:12:32,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:12:32,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:12:32,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:12:32,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:12:32,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:12:32,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:12:32,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:12:32,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:12:32,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:12:32,219 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 [2021-05-02 14:12:32,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:12:32,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:12:32,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:12:32,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:12:32,244 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:12:32,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:12:32,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:12:32,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:12:32,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:12:32,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:12:32,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:12:32,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:12:32,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:12:32,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:12:32,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:12:32,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:12:32,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:12:32,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:12:32,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:12:32,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:12:32,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:12:32,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:12:32,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:12:32,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:12:32,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:12:32,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:12:32,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:12:32,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:12:32,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:12:32,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:12:32,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:12:32,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:12:32,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:12:32,483 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:12:32,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-02 14:12:32,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c1c7ea1/cb370784da294040884ddbc5f4867d0b/FLAGedd4af85c [2021-05-02 14:12:32,868 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:12:32,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-02 14:12:32,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c1c7ea1/cb370784da294040884ddbc5f4867d0b/FLAGedd4af85c [2021-05-02 14:12:32,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21c1c7ea1/cb370784da294040884ddbc5f4867d0b [2021-05-02 14:12:32,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:12:32,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:12:32,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:12:32,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:12:32,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:12:32,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:12:32" (1/1) ... [2021-05-02 14:12:32,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d13b84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:32, skipping insertion in model container [2021-05-02 14:12:32,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:12:32" (1/1) ... [2021-05-02 14:12:32,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:12:32,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:12:33,033 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/cohendiv-ll_valuebound5.c[576,589] [2021-05-02 14:12:33,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:12:33,058 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:12:33,067 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/cohendiv-ll_valuebound5.c[576,589] [2021-05-02 14:12:33,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:12:33,093 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:12:33,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33 WrapperNode [2021-05-02 14:12:33,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:12:33,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:12:33,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:12:33,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:12:33,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (1/1) ... [2021-05-02 14:12:33,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (1/1) ... [2021-05-02 14:12:33,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (1/1) ... [2021-05-02 14:12:33,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (1/1) ... [2021-05-02 14:12:33,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (1/1) ... [2021-05-02 14:12:33,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (1/1) ... [2021-05-02 14:12:33,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (1/1) ... [2021-05-02 14:12:33,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:12:33,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:12:33,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:12:33,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:12:33,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (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 [2021-05-02 14:12:33,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:12:33,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:12:33,221 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:12:33,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:12:33,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:12:33,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:12:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:12:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:12:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:12:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:12:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:12:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:12:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:12:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:12:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:12:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:12:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:12:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:12:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:12:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:12:33,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:12:33,439 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:12:33,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:12:33 BoogieIcfgContainer [2021-05-02 14:12:33,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:12:33,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:12:33,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:12:33,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:12:33,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:12:32" (1/3) ... [2021-05-02 14:12:33,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ea1002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:12:33, skipping insertion in model container [2021-05-02 14:12:33,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:33" (2/3) ... [2021-05-02 14:12:33,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ea1002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:12:33, skipping insertion in model container [2021-05-02 14:12:33,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:12:33" (3/3) ... [2021-05-02 14:12:33,453 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound5.c [2021-05-02 14:12:33,462 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:12:33,464 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:12:33,477 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:12:33,503 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:12:33,503 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:12:33,503 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:12:33,504 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:12:33,504 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:12:33,504 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:12:33,504 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:12:33,504 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:12:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:12:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:12:33,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:33,521 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:33,521 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2021-05-02 14:12:33,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:33,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127844168] [2021-05-02 14:12:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:33,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:12:33,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:12:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:33,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:12:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:33,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:12:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:12:33,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:33,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127844168] [2021-05-02 14:12:33,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127844168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:33,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:33,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:12:33,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200451052] [2021-05-02 14:12:33,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:12:33,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:33,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:12:33,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:12:33,745 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:12:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:33,894 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2021-05-02 14:12:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:12:33,896 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 14:12:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:33,900 INFO L225 Difference]: With dead ends: 71 [2021-05-02 14:12:33,900 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:12:33,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:12:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:12:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:12:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:12:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 14:12:33,943 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-02 14:12:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:33,943 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 14:12:33,943 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:12:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 14:12:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:12:33,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:33,944 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:33,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:12:33,944 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2021-05-02 14:12:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:33,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161414436] [2021-05-02 14:12:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:33,957 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:33,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171042200] [2021-05-02 14:12:33,958 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 [2021-05-02 14:12:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:34,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:12:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:34,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:12:34,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:34,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161414436] [2021-05-02 14:12:34,224 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:34,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171042200] [2021-05-02 14:12:34,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171042200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:34,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:34,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:12:34,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296565760] [2021-05-02 14:12:34,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:12:34,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:12:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:12:34,226 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:12:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:34,352 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 14:12:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:12:34,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 14:12:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:34,356 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:12:34,356 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:12:34,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:12:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:12:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 14:12:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:12:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 14:12:34,365 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-02 14:12:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:34,365 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 14:12:34,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:12:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 14:12:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:12:34,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:34,366 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:34,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:12:34,567 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:34,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2021-05-02 14:12:34,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:34,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040497704] [2021-05-02 14:12:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:34,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:34,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414852643] [2021-05-02 14:12:34,579 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 [2021-05-02 14:12:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:12:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:34,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:12:34,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040497704] [2021-05-02 14:12:34,856 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414852643] [2021-05-02 14:12:34,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414852643] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:34,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:34,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 14:12:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517745011] [2021-05-02 14:12:34,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:12:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:12:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:12:34,859 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:12:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:34,989 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-02 14:12:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:12:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-02 14:12:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:34,990 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:12:34,991 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:12:34,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:12:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:12:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:12:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 14:12:35,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-02 14:12:35,000 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-02 14:12:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:35,001 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-02 14:12:35,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:12:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-02 14:12:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 14:12:35,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:35,002 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:35,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:35,217 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:35,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2021-05-02 14:12:35,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:35,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468878349] [2021-05-02 14:12:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:35,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:35,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110599649] [2021-05-02 14:12:35,228 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 [2021-05-02 14:12:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:12:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:35,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 14:12:35,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468878349] [2021-05-02 14:12:35,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110599649] [2021-05-02 14:12:35,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110599649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:35,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:35,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:12:35,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815151643] [2021-05-02 14:12:35,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:12:35,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:12:35,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:12:35,379 INFO L87 Difference]: Start difference. First operand 53 states and 67 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:12:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:35,483 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-05-02 14:12:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:12:35,484 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2021-05-02 14:12:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:35,488 INFO L225 Difference]: With dead ends: 79 [2021-05-02 14:12:35,488 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 14:12:35,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:12:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 14:12:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-02 14:12:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:12:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-02 14:12:35,509 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-02 14:12:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:35,518 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-02 14:12:35,518 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:12:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-02 14:12:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:12:35,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:35,520 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:35,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:35,720 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:35,721 INFO L82 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2021-05-02 14:12:35,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:35,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79787938] [2021-05-02 14:12:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:35,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:35,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768578717] [2021-05-02 14:12:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:12:35,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:35,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:35,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:35,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 14:12:35,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:35,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79787938] [2021-05-02 14:12:35,943 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:35,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768578717] [2021-05-02 14:12:35,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768578717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:35,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:35,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:12:35,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285889724] [2021-05-02 14:12:35,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:12:35,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:12:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:12:35,945 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:12:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:36,085 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2021-05-02 14:12:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:12:36,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-02 14:12:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:36,087 INFO L225 Difference]: With dead ends: 76 [2021-05-02 14:12:36,087 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 14:12:36,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:12:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 14:12:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 14:12:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:12:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-05-02 14:12:36,098 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 56 [2021-05-02 14:12:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:36,098 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-05-02 14:12:36,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:12:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-05-02 14:12:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 14:12:36,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:36,100 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:36,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:36,316 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2021-05-02 14:12:36,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:36,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545884418] [2021-05-02 14:12:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:36,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:36,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771106278] [2021-05-02 14:12:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 14:12:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:36,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:12:36,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:36,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 14:12:36,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:36,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545884418] [2021-05-02 14:12:36,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:36,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771106278] [2021-05-02 14:12:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771106278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:36,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:36,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:12:36,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783319437] [2021-05-02 14:12:36,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:12:36,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:36,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:12:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:12:36,608 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:12:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:36,769 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2021-05-02 14:12:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:12:36,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2021-05-02 14:12:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:36,770 INFO L225 Difference]: With dead ends: 130 [2021-05-02 14:12:36,771 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 14:12:36,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:12:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 14:12:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-05-02 14:12:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:12:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2021-05-02 14:12:36,792 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 63 [2021-05-02 14:12:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:36,793 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2021-05-02 14:12:36,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:12:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2021-05-02 14:12:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 14:12:36,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:36,794 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:37,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:12:37,003 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2021-05-02 14:12:37,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:37,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146381142] [2021-05-02 14:12:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:37,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:37,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688126905] [2021-05-02 14:12:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 14:12:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 14:12:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:37,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:12:37,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:37,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146381142] [2021-05-02 14:12:37,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:37,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688126905] [2021-05-02 14:12:37,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688126905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:37,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:37,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:12:37,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033903174] [2021-05-02 14:12:37,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:12:37,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:12:37,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:12:37,419 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:12:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:37,710 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2021-05-02 14:12:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:12:37,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2021-05-02 14:12:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:37,712 INFO L225 Difference]: With dead ends: 122 [2021-05-02 14:12:37,712 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 14:12:37,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:12:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 14:12:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2021-05-02 14:12:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.125) internal successors, (72), 66 states have internal predecessors, (72), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 14:12:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2021-05-02 14:12:37,738 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 86 [2021-05-02 14:12:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:37,738 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2021-05-02 14:12:37,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:12:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2021-05-02 14:12:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 14:12:37,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:37,742 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:37,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:37,957 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 2 times [2021-05-02 14:12:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:37,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034836184] [2021-05-02 14:12:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:37,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:37,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267530538] [2021-05-02 14:12:37,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:38,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:12:38,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:12:38,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 14:12:38,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:38,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 69 proven. 24 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-05-02 14:12:38,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:38,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034836184] [2021-05-02 14:12:38,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:38,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267530538] [2021-05-02 14:12:38,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267530538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:38,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:38,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:12:38,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507255069] [2021-05-02 14:12:38,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:12:38,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:12:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:12:38,613 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 14:12:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:39,013 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2021-05-02 14:12:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:12:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 109 [2021-05-02 14:12:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:39,017 INFO L225 Difference]: With dead ends: 189 [2021-05-02 14:12:39,017 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 14:12:39,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:12:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 14:12:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2021-05-02 14:12:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 64 states have (on average 1.109375) internal successors, (71), 66 states have internal predecessors, (71), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 14:12:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-05-02 14:12:39,029 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 109 [2021-05-02 14:12:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:39,029 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-05-02 14:12:39,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 14:12:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-05-02 14:12:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 14:12:39,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:39,030 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:39,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:39,249 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 3 times [2021-05-02 14:12:39,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:39,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109702584] [2021-05-02 14:12:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:39,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668376403] [2021-05-02 14:12:39,257 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 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 [2021-05-02 14:12:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:12:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:12:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:12:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:39,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-05-02 14:12:39,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109702584] [2021-05-02 14:12:39,508 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668376403] [2021-05-02 14:12:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668376403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:39,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:39,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:12:39,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532894181] [2021-05-02 14:12:39,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:12:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:12:39,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:12:39,510 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 14:12:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:47,742 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2021-05-02 14:12:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:12:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 116 [2021-05-02 14:12:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:47,743 INFO L225 Difference]: With dead ends: 132 [2021-05-02 14:12:47,743 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 14:12:47,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:12:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 14:12:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-02 14:12:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 77 states have internal predecessors, (82), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-02 14:12:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-05-02 14:12:47,755 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 116 [2021-05-02 14:12:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:47,756 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-05-02 14:12:47,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 14:12:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-05-02 14:12:47,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 14:12:47,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:47,757 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:47,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:12:47,957 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash -602201186, now seen corresponding path program 4 times [2021-05-02 14:12:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281722640] [2021-05-02 14:12:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:47,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:47,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177087489] [2021-05-02 14:12:47,968 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 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 [2021-05-02 14:12:48,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:12:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:12:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:12:48,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:48,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 180 proven. 20 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-05-02 14:12:48,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:48,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281722640] [2021-05-02 14:12:48,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:48,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177087489] [2021-05-02 14:12:48,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177087489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:48,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:48,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:12:48,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393079787] [2021-05-02 14:12:48,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:12:48,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:12:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:12:48,293 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 14:12:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:48,468 INFO L93 Difference]: Finished difference Result 231 states and 294 transitions. [2021-05-02 14:12:48,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:12:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 133 [2021-05-02 14:12:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:48,470 INFO L225 Difference]: With dead ends: 231 [2021-05-02 14:12:48,470 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 14:12:48,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:12:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 14:12:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2021-05-02 14:12:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 88 states have internal predecessors, (93), 50 states have call successors, (50), 16 states have call predecessors, (50), 15 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 14:12:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 191 transitions. [2021-05-02 14:12:48,485 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 191 transitions. Word has length 133 [2021-05-02 14:12:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:48,485 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 191 transitions. [2021-05-02 14:12:48,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-02 14:12:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 191 transitions. [2021-05-02 14:12:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 14:12:48,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:48,486 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:48,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:48,701 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1054289184, now seen corresponding path program 5 times [2021-05-02 14:12:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:48,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528114781] [2021-05-02 14:12:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:48,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:48,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12470222] [2021-05-02 14:12:48,711 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 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 [2021-05-02 14:12:48,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 14:12:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:12:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 14:12:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:48,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2021-05-02 14:12:48,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528114781] [2021-05-02 14:12:48,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12470222] [2021-05-02 14:12:48,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12470222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:48,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:48,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:12:48,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535219571] [2021-05-02 14:12:48,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:12:48,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:48,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:12:48,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:12:48,961 INFO L87 Difference]: Start difference. First operand 152 states and 191 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-05-02 14:12:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:49,012 INFO L93 Difference]: Finished difference Result 212 states and 268 transitions. [2021-05-02 14:12:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:12:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 156 [2021-05-02 14:12:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:49,014 INFO L225 Difference]: With dead ends: 212 [2021-05-02 14:12:49,014 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 14:12:49,014 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:12:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 14:12:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 14:12:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 82 states have internal predecessors, (86), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 14:12:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2021-05-02 14:12:49,030 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 156 [2021-05-02 14:12:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:49,030 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2021-05-02 14:12:49,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-05-02 14:12:49,031 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2021-05-02 14:12:49,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 14:12:49,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:49,032 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:49,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:49,245 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:49,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1051407166, now seen corresponding path program 6 times [2021-05-02 14:12:49,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:49,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783094897] [2021-05-02 14:12:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:49,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:49,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941570115] [2021-05-02 14:12:49,252 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 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 [2021-05-02 14:12:49,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 14:12:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:12:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:12:49,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 310 proven. 3 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2021-05-02 14:12:49,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:49,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783094897] [2021-05-02 14:12:49,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:49,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941570115] [2021-05-02 14:12:49,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941570115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:49,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:49,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:12:49,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508625885] [2021-05-02 14:12:49,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:12:49,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:49,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:12:49,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:12:49,698 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-02 14:12:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:49,833 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2021-05-02 14:12:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:12:49,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 179 [2021-05-02 14:12:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:49,835 INFO L225 Difference]: With dead ends: 167 [2021-05-02 14:12:49,835 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:12:49,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:12:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:12:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:12:49,836 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) [2021-05-02 14:12:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:12:49,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 179 [2021-05-02 14:12:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:49,836 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:12:49,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-02 14:12:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:12:49,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:12:50,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:12:50,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:12:50,637 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 48 [2021-05-02 14:12:51,094 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2021-05-02 14:12:51,491 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2021-05-02 14:12:52,012 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2021-05-02 14:12:52,420 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2021-05-02 14:12:52,762 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2021-05-02 14:12:53,324 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2021-05-02 14:12:53,661 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 49 [2021-05-02 14:12:53,687 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:12:53,688 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|)) [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:12:53,688 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point L64(line 64) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= main_~x~0 5) (<= 0 main_~x~0)) [2021-05-02 14:12:53,688 INFO L194 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: (and (<= main_~x~0 5) (<= 0 main_~x~0) (<= main_~y~0 5) (<= 0 main_~y~0)) [2021-05-02 14:12:53,688 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 66) no Hoare annotation was computed. [2021-05-02 14:12:53,688 INFO L198 CegarLoopUtils]: For program point L50(lines 47 59) no Hoare annotation was computed. [2021-05-02 14:12:53,689 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse6 (* main_~y~0 main_~a~0))) (let ((.cse7 (* main_~y~0 main_~q~0)) (.cse0 (* 2 main_~y~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~x~0 main_~r~0)) (.cse3 (<= main_~r~0 5)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 .cse6)) (.cse8 (* 4 main_~y~0))) (or (and (<= .cse0 main_~r~0) .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~a~0 2)) (and (= (+ main_~x~0 .cse6) (+ .cse7 main_~b~0 main_~r~0)) .cse2 .cse3 (<= main_~y~0 main_~r~0) .cse4 .cse5 (<= 1 main_~a~0) (<= main_~b~0 main_~y~0)) (and (or (and (<= main_~x~0 (+ .cse8 main_~r~0)) (= (+ .cse7 main_~r~0) main_~x~0) (<= .cse8 main_~x~0) (= (mod main_~q~0 (- 2)) 0) (<= 1 (div (div (* main_~q~0 (- 1)) (- 2)) 2)) .cse5) (and (= (+ (* main_~y~0 2) main_~r~0) main_~x~0) (< (* 2 main_~r~0) main_~x~0) .cse5 (<= .cse0 main_~x~0) (= main_~q~0 2))) (<= main_~x~0 5) .cse4) (and (<= .cse8 main_~r~0) .cse1 (<= 1 (div (div (* main_~a~0 (- 1)) (- 2)) 2)) .cse2 (= (mod main_~a~0 (- 2)) 0) .cse3 .cse4 .cse5 (<= main_~b~0 .cse8))))) [2021-05-02 14:12:53,689 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse8 (* main_~y~0 main_~a~0)) (.cse6 (* main_~y~0 main_~q~0))) (let ((.cse7 (* 2 main_~y~0)) (.cse0 (= (+ main_~x~0 .cse8) (+ .cse6 main_~b~0 main_~r~0))) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= main_~r~0 5)) (.cse3 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 .cse8)) (.cse5 (* 4 main_~y~0))) (or (and .cse0 .cse1 .cse2 (<= main_~y~0 main_~r~0) .cse3 .cse4 (<= 1 main_~a~0) (<= main_~b~0 main_~y~0)) (and (or (and (<= main_~x~0 (+ .cse5 main_~r~0)) (= (+ .cse6 main_~r~0) main_~x~0) (<= .cse5 main_~x~0) (= (mod main_~q~0 (- 2)) 0) (<= 1 (div (div (* main_~q~0 (- 1)) (- 2)) 2)) .cse4) (and (= (+ (* main_~y~0 2) main_~r~0) main_~x~0) (< (* 2 main_~r~0) main_~x~0) .cse4 (<= .cse7 main_~x~0) (= main_~q~0 2))) (<= main_~x~0 5) .cse3) (and (<= .cse7 main_~r~0) .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~a~0 2)) (and (<= .cse5 main_~r~0) (<= 1 (div (div (* main_~a~0 (- 1)) (- 2)) 2)) .cse0 .cse1 (= (mod main_~a~0 (- 2)) 0) .cse2 .cse3 .cse4 (<= main_~b~0 .cse5))))) [2021-05-02 14:12:53,689 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 66) no Hoare annotation was computed. [2021-05-02 14:12:53,689 INFO L198 CegarLoopUtils]: For program point L40(lines 38 62) no Hoare annotation was computed. [2021-05-02 14:12:53,689 INFO L194 CegarLoopUtils]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse9 (* main_~y~0 main_~a~0))) (let ((.cse1 (* 2 main_~r~0)) (.cse6 (= (+ main_~b~0 main_~r~0) main_~x~0)) (.cse7 (= main_~a~0 main_~q~0)) (.cse0 (<= main_~x~0 5)) (.cse8 (= (+ main_~x~0 .cse9) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0))) (.cse3 (<= 0 main_~x~0)) (.cse4 (<= main_~y~0 5)) (.cse5 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 .cse9))) (or (and (or (and .cse0 (< .cse1 main_~x~0) .cse2 (<= (* 2 main_~y~0) main_~x~0) (= main_~q~0 2)) (and (<= 1 (div (div (* main_~a~0 (- 1)) (- 2)) 2)) .cse0 .cse3 (= (mod main_~a~0 (- 2)) 0) .cse4 .cse5 .cse2)) .cse6 .cse7) (and .cse0 .cse8 .cse3 .cse4 (< .cse1 2) .cse5 .cse2) (and .cse6 .cse3 .cse4 (<= main_~r~0 5) .cse7 .cse5 .cse2 (= main_~a~0 0)) (and .cse0 .cse8 (= main_~b~0 main_~y~0) .cse3 .cse4 (< main_~r~0 main_~y~0) .cse5 .cse2)))) [2021-05-02 14:12:53,689 INFO L194 CegarLoopUtils]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 5)) (.cse1 (<= 0 main_~x~0)) (.cse2 (<= main_~y~0 5)) (.cse3 (<= 1 main_~y~0))) (or (and (= main_~q~0 0) .cse0 (= main_~x~0 main_~r~0) .cse1 .cse2 .cse3) (let ((.cse4 (* main_~y~0 main_~a~0))) (and .cse0 (= (+ main_~x~0 .cse4) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) .cse1 .cse2 .cse3 (= main_~b~0 .cse4))))) [2021-05-02 14:12:53,689 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2021-05-02 14:12:53,689 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse4 (* main_~y~0 main_~a~0))) (let ((.cse0 (<= main_~x~0 5)) (.cse1 (<= (* 2 .cse4) main_~r~0)) (.cse3 (= main_~b~0 .cse4)) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~q~0 0) .cse0 (= main_~x~0 main_~r~0) .cse1 .cse2 .cse3 (<= 1 main_~a~0)) (and .cse0 (= (+ main_~x~0 .cse4) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) (or (let ((.cse5 (* 4 main_~y~0))) (and (<= main_~x~0 (+ .cse5 main_~r~0)) (<= .cse5 main_~x~0) .cse1 (= (mod main_~q~0 (- 2)) 0) (<= 1 (div (div (* main_~q~0 (- 1)) (- 2)) 2)) .cse3)) (and .cse1 (< (* 2 main_~r~0) main_~x~0) .cse3 (<= (* 2 main_~y~0) main_~x~0) (= main_~q~0 2))) .cse2)))) [2021-05-02 14:12:53,689 INFO L198 CegarLoopUtils]: For program point L55-1(line 55) no Hoare annotation was computed. [2021-05-02 14:12:53,689 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse8 (* main_~y~0 main_~a~0)) (.cse6 (* main_~y~0 main_~q~0))) (let ((.cse7 (* 2 main_~y~0)) (.cse0 (= (+ main_~x~0 .cse8) (+ .cse6 main_~b~0 main_~r~0))) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= main_~r~0 5)) (.cse3 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 .cse8)) (.cse5 (* 4 main_~y~0))) (or (and .cse0 .cse1 .cse2 (<= main_~y~0 main_~r~0) .cse3 .cse4 (<= 1 main_~a~0) (<= main_~b~0 main_~y~0)) (and (or (and (<= main_~x~0 (+ .cse5 main_~r~0)) (= (+ .cse6 main_~r~0) main_~x~0) (<= .cse5 main_~x~0) (= (mod main_~q~0 (- 2)) 0) (<= 1 (div (div (* main_~q~0 (- 1)) (- 2)) 2)) .cse4) (and (= (+ (* main_~y~0 2) main_~r~0) main_~x~0) (< (* 2 main_~r~0) main_~x~0) .cse4 (<= .cse7 main_~x~0) (= main_~q~0 2))) (<= main_~x~0 5) .cse3) (and (<= .cse7 main_~r~0) .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~a~0 2)) (and (<= .cse5 main_~r~0) (<= 1 (div (div (* main_~a~0 (- 1)) (- 2)) 2)) .cse0 .cse1 (= (mod main_~a~0 (- 2)) 0) .cse2 .cse3 .cse4 (<= main_~b~0 .cse5))))) [2021-05-02 14:12:53,689 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse6 (* main_~y~0 main_~a~0))) (let ((.cse7 (* main_~y~0 main_~q~0)) (.cse0 (* 2 main_~y~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~x~0 main_~r~0)) (.cse3 (<= main_~r~0 5)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 .cse6)) (.cse8 (* 4 main_~y~0))) (or (and (<= .cse0 main_~r~0) .cse1 .cse2 .cse3 .cse4 .cse5 (= main_~a~0 2)) (and (= (+ main_~x~0 .cse6) (+ .cse7 main_~b~0 main_~r~0)) .cse2 .cse3 (<= main_~y~0 main_~r~0) .cse4 .cse5 (<= 1 main_~a~0) (<= main_~b~0 main_~y~0)) (and (or (and (<= main_~x~0 (+ .cse8 main_~r~0)) (= (+ .cse7 main_~r~0) main_~x~0) (<= .cse8 main_~x~0) (= (mod main_~q~0 (- 2)) 0) (<= 1 (div (div (* main_~q~0 (- 1)) (- 2)) 2)) .cse5) (and (= (+ (* main_~y~0 2) main_~r~0) main_~x~0) (< (* 2 main_~r~0) main_~x~0) .cse5 (<= .cse0 main_~x~0) (= main_~q~0 2))) (<= main_~x~0 5) .cse4) (and (<= .cse8 main_~r~0) .cse1 (<= 1 (div (div (* main_~a~0 (- 1)) (- 2)) 2)) .cse2 (= (mod main_~a~0 (- 2)) 0) .cse3 .cse4 .cse5 (<= main_~b~0 .cse8))))) [2021-05-02 14:12:53,689 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2021-05-02 14:12:53,690 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse9 (* main_~y~0 main_~a~0))) (let ((.cse1 (* 2 main_~r~0)) (.cse6 (= (+ main_~b~0 main_~r~0) main_~x~0)) (.cse7 (= main_~a~0 main_~q~0)) (.cse0 (<= main_~x~0 5)) (.cse8 (= (+ main_~x~0 .cse9) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0))) (.cse3 (<= 0 main_~x~0)) (.cse4 (<= main_~y~0 5)) (.cse5 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 .cse9))) (or (and (or (and .cse0 (< .cse1 main_~x~0) .cse2 (<= (* 2 main_~y~0) main_~x~0) (= main_~q~0 2)) (and (<= 1 (div (div (* main_~a~0 (- 1)) (- 2)) 2)) .cse0 .cse3 (= (mod main_~a~0 (- 2)) 0) .cse4 .cse5 .cse2)) .cse6 .cse7) (and .cse0 .cse8 .cse3 .cse4 (< .cse1 2) .cse5 .cse2) (and .cse6 .cse3 .cse4 (<= main_~r~0 5) .cse7 .cse5 .cse2 (= main_~a~0 0)) (and .cse0 .cse8 (= main_~b~0 main_~y~0) .cse3 .cse4 (< main_~r~0 main_~y~0) .cse5 .cse2)))) [2021-05-02 14:12:53,690 INFO L194 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse11 (* main_~y~0 main_~a~0)) (.cse0 (* main_~y~0 main_~q~0))) (let ((.cse9 (= (+ main_~x~0 .cse11) (+ .cse0 main_~b~0 main_~r~0))) (.cse3 (* 2 main_~r~0)) (.cse4 (* 2 main_~y~0)) (.cse2 (<= main_~x~0 5)) (.cse1 (= (+ main_~b~0 main_~r~0) main_~x~0)) (.cse5 (<= 0 main_~x~0)) (.cse6 (<= main_~y~0 5)) (.cse8 (= main_~a~0 main_~q~0)) (.cse7 (<= 1 main_~y~0)) (.cse10 (= main_~b~0 .cse11))) (or (and (= (+ .cse0 main_~r~0) main_~x~0) .cse1 (or (and .cse2 (< .cse3 main_~x~0) (<= .cse4 main_~x~0) (= main_~q~0 2)) (and .cse2 .cse5 .cse6 (= (mod main_~q~0 (- 2)) 0) (<= 1 (div (div (* main_~q~0 (- 1)) (- 2)) 2)) .cse7)) .cse8) (and .cse2 .cse9 .cse5 .cse6 (< main_~r~0 main_~y~0) .cse7 .cse10 (<= main_~b~0 main_~y~0)) (and .cse2 .cse9 .cse5 .cse6 (< .cse3 2) .cse7 .cse10) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 .cse4) .cse2 .cse10 (= main_~q~0 1) (<= main_~y~0 main_~x~0)) (and .cse1 (= main_~x~0 main_~r~0) .cse5 .cse6 (<= main_~r~0 5) .cse8 .cse7 .cse10)))) [2021-05-02 14:12:53,690 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 14:12:53,690 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 14:12:53,690 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 14:12:53,690 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:12:53,690 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:12:53,690 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 14:12:53,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:12:53 BoogieIcfgContainer [2021-05-02 14:12:53,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:12:53,703 INFO L168 Benchmark]: Toolchain (without parser) took 20812.07 ms. Allocated memory was 187.7 MB in the beginning and 295.7 MB in the end (delta: 108.0 MB). Free memory was 152.6 MB in the beginning and 248.4 MB in the end (delta: -95.8 MB). Peak memory consumption was 158.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:53,703 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 187.7 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:12:53,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.56 ms. Allocated memory is still 187.7 MB. Free memory was 152.4 MB in the beginning and 142.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:53,703 INFO L168 Benchmark]: Boogie Preprocessor took 59.83 ms. Allocated memory is still 187.7 MB. Free memory was 142.3 MB in the beginning and 171.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:53,703 INFO L168 Benchmark]: RCFGBuilder took 285.42 ms. Allocated memory is still 187.7 MB. Free memory was 171.6 MB in the beginning and 155.5 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:53,704 INFO L168 Benchmark]: TraceAbstraction took 20261.73 ms. Allocated memory was 187.7 MB in the beginning and 295.7 MB in the end (delta: 108.0 MB). Free memory was 155.2 MB in the beginning and 248.4 MB in the end (delta: -93.2 MB). Peak memory consumption was 161.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:53,704 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 187.7 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 200.56 ms. Allocated memory is still 187.7 MB. Free memory was 152.4 MB in the beginning and 142.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.83 ms. Allocated memory is still 187.7 MB. Free memory was 142.3 MB in the beginning and 171.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 4.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 285.42 ms. Allocated memory is still 187.7 MB. Free memory was 171.6 MB in the beginning and 155.5 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20261.73 ms. Allocated memory was 187.7 MB in the beginning and 295.7 MB in the end (delta: 108.0 MB). Free memory was 155.2 MB in the beginning and 248.4 MB in the end (delta: -93.2 MB). Peak memory consumption was 161.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16550.9ms, OverallIterations: 12, TraceHistogramMax: 27, EmptinessCheckTime: 20.8ms, AutomataDifference: 10156.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 3634.8ms, InitialAbstractionConstructionTime: 8.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 497 SDtfs, 312 SDslu, 2059 SDs, 0 SdLazy, 2079 SolverSat, 272 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9161.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 908 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1095.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=10, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 175.6ms AutomataMinimizationTime, 12 MinimizatonAttempts, 48 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 152 PreInvPairs, 216 NumberOfFragments, 1486 HoareAnnotationTreeSize, 152 FomulaSimplifications, 4369 FormulaSimplificationTreeSizeReduction, 287.4ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 6519 FormulaSimplificationTreeSizeReductionInter, 3327.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 104.1ms SsaConstructionTime, 327.6ms SatisfiabilityAnalysisTime, 2994.9ms InterpolantComputationTime, 1027 NumberOfCodeBlocks, 868 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1015 ConstructedInterpolants, 0 QuantifiedInterpolants, 3700 SizeOfPredicates, 55 NumberOfNonLiveVariables, 2278 ConjunctsInSsa, 256 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 4414/4533 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: 47]: Loop Invariant Derived loop invariant: ((((((((2 * y <= r && q == 0) && x == r) && r <= 5) && 1 <= y) && b == y * a) && a == 2) || (((((((x + y * a == y * q + b + r && x == r) && r <= 5) && y <= r) && 1 <= y) && b == y * a) && 1 <= a) && b <= y)) || ((((((((x <= 4 * y + r && y * q + r == x) && 4 * y <= x) && q % -2 == 0) && 1 <= q * -1 / -2 / 2) && b == y * a) || ((((y * 2 + r == x && 2 * r < x) && b == y * a) && 2 * y <= x) && q == 2)) && x <= 5) && 1 <= y)) || ((((((((4 * y <= r && q == 0) && 1 <= a * -1 / -2 / 2) && x == r) && a % -2 == 0) && r <= 5) && 1 <= y) && b == y * a) && b <= 4 * y) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (((((((((x <= 5 && 2 * r < x) && b == y * a) && 2 * y <= x) && q == 2) || ((((((1 <= a * -1 / -2 / 2 && x <= 5) && 0 <= x) && a % -2 == 0) && y <= 5) && 1 <= y) && b == y * a)) && b + r == x) && a == q) || ((((((x <= 5 && x + y * a == y * q + b + r) && 0 <= x) && y <= 5) && 2 * r < 2) && 1 <= y) && b == y * a)) || (((((((b + r == x && 0 <= x) && y <= 5) && r <= 5) && a == q) && 1 <= y) && b == y * a) && a == 0)) || (((((((x <= 5 && x + y * a == y * q + b + r) && b == y) && 0 <= x) && y <= 5) && r < y) && 1 <= y) && b == y * a) RESULT: Ultimate proved your program to be correct! Received shutdown request...