/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/egcd3-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:37:40,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:37:40,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:37:40,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:37:40,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:37:40,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:37:40,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:37:40,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:37:40,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:37:40,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:37:40,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:37:40,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:37:40,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:37:40,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:37:40,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:37:40,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:37:40,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:37:40,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:37:40,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:37:40,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:37:40,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:37:40,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:37:40,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:37:40,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:37:40,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:37:40,750 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:37:40,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:37:40,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:37:40,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:37:40,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:37:40,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:37:40,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:37:40,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:37:40,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:37:40,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:37:40,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:37:40,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:37:40,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:37:40,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:37:40,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:37:40,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:37:40,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:37:40,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:37:40,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:37:40,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:37:40,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:37:40,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:37:40,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:37:40,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:37:40,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:37:41,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:37:41,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:37:41,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:37:41,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:37:41,084 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:37:41,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-05-06 02:37:41,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de13037c1/94080773c13a4946b0d265e328e2cfeb/FLAGd2dd36630 [2021-05-06 02:37:41,576 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:37:41,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-05-06 02:37:41,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de13037c1/94080773c13a4946b0d265e328e2cfeb/FLAGd2dd36630 [2021-05-06 02:37:42,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de13037c1/94080773c13a4946b0d265e328e2cfeb [2021-05-06 02:37:42,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:37:42,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:37:42,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:37:42,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:37:42,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:37:42,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc8672a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42, skipping insertion in model container [2021-05-06 02:37:42,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:37:42,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:37:42,174 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/egcd3-ll_valuebound2.c[490,503] [2021-05-06 02:37:42,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:37:42,194 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:37:42,204 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/egcd3-ll_valuebound2.c[490,503] [2021-05-06 02:37:42,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:37:42,222 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:37:42,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42 WrapperNode [2021-05-06 02:37:42,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:37:42,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:37:42,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:37:42,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:37:42,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... [2021-05-06 02:37:42,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:37:42,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:37:42,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:37:42,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:37:42,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:37:42,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:37:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:37:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:37:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:37:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:37:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:37:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:37:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:37:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:37:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:37:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:37:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:37:42,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:37:42,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:37:42,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:37:42,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:37:42,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:37:42,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:37:42,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:37:42,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:37:42,702 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:37:42,703 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 02:37:42,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:37:42 BoogieIcfgContainer [2021-05-06 02:37:42,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:37:42,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:37:42,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:37:42,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:37:42,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:37:42" (1/3) ... [2021-05-06 02:37:42,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456550cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:37:42, skipping insertion in model container [2021-05-06 02:37:42,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:37:42" (2/3) ... [2021-05-06 02:37:42,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456550cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:37:42, skipping insertion in model container [2021-05-06 02:37:42,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:37:42" (3/3) ... [2021-05-06 02:37:42,718 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2021-05-06 02:37:42,723 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:37:42,726 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:37:42,740 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:37:42,771 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:37:42,771 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:37:42,771 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:37:42,772 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:37:42,772 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:37:42,772 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:37:42,772 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:37:42,772 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:37:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:37:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:37:42,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:42,796 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:42,796 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-06 02:37:42,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:42,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707587620] [2021-05-06 02:37:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:37:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:37:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:37:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:37:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:37:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:37:43,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:43,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707587620] [2021-05-06 02:37:43,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707587620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:43,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:43,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:37:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829755966] [2021-05-06 02:37:43,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:37:43,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:43,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:37:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:37:43,160 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:37:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:43,292 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-06 02:37:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:37:43,294 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:37:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:43,300 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:37:43,300 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:37:43,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:37:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:37:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:37:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:37:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 02:37:43,346 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 02:37:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:43,346 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 02:37:43,346 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:37:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 02:37:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:37:43,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:43,348 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:43,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:37:43,349 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-06 02:37:43,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:43,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862299112] [2021-05-06 02:37:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:43,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:43,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250230925] [2021-05-06 02:37:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:37:43,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:43,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:37:43,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862299112] [2021-05-06 02:37:43,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:43,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250230925] [2021-05-06 02:37:43,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250230925] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:43,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:43,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:37:43,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590468238] [2021-05-06 02:37:43,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:37:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:37:43,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:37:43,559 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:43,677 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 02:37:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:37:43,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 02:37:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:43,679 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:37:43,679 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:37:43,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:37:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:37:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 02:37:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:37:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 02:37:43,693 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 02:37:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:43,694 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 02:37:43,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 02:37:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:37:43,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:43,695 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:37:43,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:37:43,903 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:43,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:43,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-06 02:37:43,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:43,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384347306] [2021-05-06 02:37:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:43,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:43,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557090025] [2021-05-06 02:37:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 02:37:43,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:44,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:37:44,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384347306] [2021-05-06 02:37:44,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557090025] [2021-05-06 02:37:44,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557090025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:44,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:44,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:37:44,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696979743] [2021-05-06 02:37:44,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:37:44,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:37:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:37:44,410 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:37:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:44,685 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-06 02:37:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:37:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 02:37:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:44,695 INFO L225 Difference]: With dead ends: 63 [2021-05-06 02:37:44,695 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 02:37:44,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:37:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 02:37:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-05-06 02:37:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:37:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 02:37:44,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 02:37:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:44,720 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 02:37:44,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:37:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 02:37:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:37:44,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:44,721 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:37:44,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:44,922 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:44,923 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-06 02:37:44,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:44,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212988076] [2021-05-06 02:37:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:44,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:44,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141326212] [2021-05-06 02:37:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:37:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:45,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:37:45,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:45,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212988076] [2021-05-06 02:37:45,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:45,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141326212] [2021-05-06 02:37:45,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141326212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:45,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:45,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:37:45,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758865838] [2021-05-06 02:37:45,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:37:45,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:37:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:37:45,178 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:37:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:45,424 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-06 02:37:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:37:45,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:37:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:45,427 INFO L225 Difference]: With dead ends: 103 [2021-05-06 02:37:45,428 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 02:37:45,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 02:37:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 02:37:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:37:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 02:37:45,464 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 02:37:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:45,465 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 02:37:45,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:37:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 02:37:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:37:45,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:45,470 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-05-06 02:37:45,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:45,701 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:45,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-06 02:37:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:45,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670304530] [2021-05-06 02:37:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:45,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:45,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040681340] [2021-05-06 02:37:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:45,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:37:45,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:45,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:45,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:37:46,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:46,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670304530] [2021-05-06 02:37:46,065 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:46,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040681340] [2021-05-06 02:37:46,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040681340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:46,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:46,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:37:46,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873358313] [2021-05-06 02:37:46,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:37:46,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:37:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:46,067 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:37:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:46,355 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2021-05-06 02:37:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:46,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:37:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:46,357 INFO L225 Difference]: With dead ends: 86 [2021-05-06 02:37:46,357 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:37:46,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:37:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:37:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 02:37:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:37:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 02:37:46,370 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 02:37:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:46,371 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 02:37:46,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:37:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 02:37:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:37:46,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:46,372 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:37:46,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:46,589 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-06 02:37:46,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:46,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889776941] [2021-05-06 02:37:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:46,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:46,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501094768] [2021-05-06 02:37:46,602 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 [2021-05-06 02:37:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 02:37:46,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:46,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:37:46,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:46,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889776941] [2021-05-06 02:37:46,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:46,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501094768] [2021-05-06 02:37:46,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501094768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:46,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:46,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:37:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521375925] [2021-05-06 02:37:46,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:37:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:37:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:37:46,917 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:37:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:47,208 INFO L93 Difference]: Finished difference Result 105 states and 139 transitions. [2021-05-06 02:37:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 02:37:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:47,210 INFO L225 Difference]: With dead ends: 105 [2021-05-06 02:37:47,210 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 02:37:47,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:37:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 02:37:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 02:37:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:37:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 02:37:47,225 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 02:37:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:47,225 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 02:37:47,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:37:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 02:37:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:37:47,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:47,226 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 02:37:47,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:37:47,441 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-06 02:37:47,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:47,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307791653] [2021-05-06 02:37:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:47,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:47,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041590942] [2021-05-06 02:37:47,454 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 [2021-05-06 02:37:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:37:47,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:47,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:37:47,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:47,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307791653] [2021-05-06 02:37:47,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:47,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041590942] [2021-05-06 02:37:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041590942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:47,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:47,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 02:37:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920461155] [2021-05-06 02:37:47,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:37:47,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:47,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:37:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:37:47,692 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:37:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:47,822 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2021-05-06 02:37:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:37:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 02:37:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:47,824 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:37:47,824 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 02:37:47,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 02:37:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 02:37:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:37:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 02:37:47,846 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 02:37:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:47,847 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 02:37:47,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:37:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 02:37:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:37:47,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:47,852 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:37:48,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:48,069 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-06 02:37:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:48,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627856965] [2021-05-06 02:37:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:48,096 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:48,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657672759] [2021-05-06 02:37:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:48,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:37:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:48,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:37:48,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:48,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627856965] [2021-05-06 02:37:48,299 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:48,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657672759] [2021-05-06 02:37:48,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657672759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:48,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:48,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:37:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470246192] [2021-05-06 02:37:48,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:37:48,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:48,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:37:48,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:37:48,305 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:37:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:48,499 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2021-05-06 02:37:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:37:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-05-06 02:37:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:48,502 INFO L225 Difference]: With dead ends: 113 [2021-05-06 02:37:48,503 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 02:37:48,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:37:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 02:37:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 02:37:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:37:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 02:37:48,521 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 02:37:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:48,521 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 02:37:48,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:37:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 02:37:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:37:48,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:48,522 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:37:48,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:48,745 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-06 02:37:48,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:48,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240216219] [2021-05-06 02:37:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:48,754 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:48,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276321077] [2021-05-06 02:37:48,755 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:48,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:48,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:37:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:37:48,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:48,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240216219] [2021-05-06 02:37:48,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276321077] [2021-05-06 02:37:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276321077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:48,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:48,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:37:48,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540289327] [2021-05-06 02:37:48,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:37:48,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:48,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:37:48,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:37:48,903 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:48,983 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2021-05-06 02:37:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:37:48,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 02:37:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:48,986 INFO L225 Difference]: With dead ends: 148 [2021-05-06 02:37:48,986 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 02:37:48,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:37:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 02:37:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 02:37:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:37:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 02:37:49,002 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 02:37:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:49,002 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 02:37:49,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:37:49,003 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 02:37:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:37:49,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:49,004 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-05-06 02:37:49,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:37:49,221 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-06 02:37:49,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:49,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145118956] [2021-05-06 02:37:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:49,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:49,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313385618] [2021-05-06 02:37:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:37:49,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:49,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:37:49,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145118956] [2021-05-06 02:37:49,402 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313385618] [2021-05-06 02:37:49,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313385618] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:37:49,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:37:49,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:37:49,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079300482] [2021-05-06 02:37:49,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:37:49,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:49,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:37:49,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:37:49,404 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:37:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:49,459 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2021-05-06 02:37:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:37:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 02:37:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:49,461 INFO L225 Difference]: With dead ends: 130 [2021-05-06 02:37:49,461 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 02:37:49,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:37:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 02:37:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 02:37:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 02:37:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 02:37:49,479 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 02:37:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:49,479 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 02:37:49,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:37:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 02:37:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:37:49,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:49,480 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1] [2021-05-06 02:37:49,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:49,701 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-06 02:37:49,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:49,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726770794] [2021-05-06 02:37:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:49,709 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:49,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84057792] [2021-05-06 02:37:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:37:49,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:49,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:37:49,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:49,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726770794] [2021-05-06 02:37:49,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:49,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84057792] [2021-05-06 02:37:49,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84057792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:49,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:49,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:37:49,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903600459] [2021-05-06 02:37:49,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:37:49,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:37:49,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:49,971 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:37:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:50,246 INFO L93 Difference]: Finished difference Result 166 states and 231 transitions. [2021-05-06 02:37:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 02:37:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:50,250 INFO L225 Difference]: With dead ends: 166 [2021-05-06 02:37:50,250 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 02:37:50,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:37:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 02:37:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 02:37:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 02:37:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 02:37:50,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 02:37:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:50,277 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 02:37:50,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:37:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 02:37:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 02:37:50,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:50,278 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:50,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:50,501 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-06 02:37:50,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:50,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646627114] [2021-05-06 02:37:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:50,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:50,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958728357] [2021-05-06 02:37:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:50,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:37:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:50,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:37:50,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:50,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646627114] [2021-05-06 02:37:50,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:50,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958728357] [2021-05-06 02:37:50,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958728357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:50,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:50,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:37:50,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756859843] [2021-05-06 02:37:50,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:37:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:50,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:37:50,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:37:50,907 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:37:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:51,369 INFO L93 Difference]: Finished difference Result 178 states and 243 transitions. [2021-05-06 02:37:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:51,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 02:37:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:51,373 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:37:51,373 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 02:37:51,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 02:37:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 02:37:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 02:37:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 02:37:51,411 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 02:37:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:51,411 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 02:37:51,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:37:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 02:37:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:37:51,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:51,412 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2021-05-06 02:37:51,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:37:51,636 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:51,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:51,636 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-06 02:37:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373456747] [2021-05-06 02:37:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:51,645 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:51,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676275256] [2021-05-06 02:37:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:51,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:51,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:37:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:51,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:37:51,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:51,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373456747] [2021-05-06 02:37:51,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:51,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676275256] [2021-05-06 02:37:51,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676275256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:51,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:51,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:37:51,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12903927] [2021-05-06 02:37:51,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:37:51,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:37:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:37:51,904 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:37:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:52,248 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2021-05-06 02:37:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:37:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 02:37:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:52,253 INFO L225 Difference]: With dead ends: 288 [2021-05-06 02:37:52,253 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 02:37:52,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:37:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 02:37:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 02:37:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 02:37:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 02:37:52,291 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 02:37:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:52,291 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 02:37:52,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:37:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 02:37:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:37:52,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:52,293 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-06 02:37:52,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:37:52,518 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:52,518 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-06 02:37:52,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:52,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765806897] [2021-05-06 02:37:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:52,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:52,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436930097] [2021-05-06 02:37:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:37:52,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:52,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:37:52,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:52,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765806897] [2021-05-06 02:37:52,857 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:52,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436930097] [2021-05-06 02:37:52,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436930097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:52,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:52,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:37:52,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149591241] [2021-05-06 02:37:52,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:37:52,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:37:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:37:52,859 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:37:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:53,153 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2021-05-06 02:37:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:37:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 02:37:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:53,154 INFO L225 Difference]: With dead ends: 295 [2021-05-06 02:37:53,155 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:37:53,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:37:53,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:37:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2021-05-06 02:37:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 124 states have internal predecessors, (139), 69 states have call successors, (69), 15 states have call predecessors, (69), 14 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-06 02:37:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 275 transitions. [2021-05-06 02:37:53,191 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 275 transitions. Word has length 74 [2021-05-06 02:37:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:53,191 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 275 transitions. [2021-05-06 02:37:53,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:37:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 275 transitions. [2021-05-06 02:37:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 02:37:53,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:53,192 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1] [2021-05-06 02:37:53,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:37:53,413 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-06 02:37:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:53,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055053901] [2021-05-06 02:37:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:53,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:53,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785059780] [2021-05-06 02:37:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:53,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:37:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:53,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-06 02:37:53,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:53,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055053901] [2021-05-06 02:37:53,681 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:53,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785059780] [2021-05-06 02:37:53,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785059780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:53,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:53,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:37:53,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830672438] [2021-05-06 02:37:53,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:37:53,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:53,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:37:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:37:53,683 INFO L87 Difference]: Start difference. First operand 202 states and 275 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:37:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:53,971 INFO L93 Difference]: Finished difference Result 294 states and 408 transitions. [2021-05-06 02:37:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:37:53,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 72 [2021-05-06 02:37:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:53,973 INFO L225 Difference]: With dead ends: 294 [2021-05-06 02:37:53,973 INFO L226 Difference]: Without dead ends: 206 [2021-05-06 02:37:53,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-06 02:37:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2021-05-06 02:37:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 112 states have internal predecessors, (121), 69 states have call successors, (69), 15 states have call predecessors, (69), 14 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-06 02:37:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 257 transitions. [2021-05-06 02:37:54,008 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 257 transitions. Word has length 72 [2021-05-06 02:37:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:54,008 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 257 transitions. [2021-05-06 02:37:54,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:37:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 257 transitions. [2021-05-06 02:37:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:37:54,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:54,010 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1] [2021-05-06 02:37:54,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:54,225 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 2 times [2021-05-06 02:37:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344966572] [2021-05-06 02:37:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:54,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:54,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451632334] [2021-05-06 02:37:54,232 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:54,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:54,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:37:54,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:54,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-05-06 02:37:54,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344966572] [2021-05-06 02:37:54,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:54,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451632334] [2021-05-06 02:37:54,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451632334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:54,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:54,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:37:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442339828] [2021-05-06 02:37:54,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:37:54,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:54,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:37:54,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:54,504 INFO L87 Difference]: Start difference. First operand 190 states and 257 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:37:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:54,802 INFO L93 Difference]: Finished difference Result 267 states and 354 transitions. [2021-05-06 02:37:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:37:54,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 77 [2021-05-06 02:37:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:54,803 INFO L225 Difference]: With dead ends: 267 [2021-05-06 02:37:54,803 INFO L226 Difference]: Without dead ends: 152 [2021-05-06 02:37:54,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:37:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-06 02:37:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-06 02:37:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 87 states have (on average 1.103448275862069) internal successors, (96), 91 states have internal predecessors, (96), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:37:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2021-05-06 02:37:54,832 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 77 [2021-05-06 02:37:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:54,832 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2021-05-06 02:37:54,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:37:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2021-05-06 02:37:54,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:37:54,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:54,833 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-06 02:37:55,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:37:55,058 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1033380920, now seen corresponding path program 1 times [2021-05-06 02:37:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:55,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943361536] [2021-05-06 02:37:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:55,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:55,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215283961] [2021-05-06 02:37:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:55,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 02:37:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:37:55,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:55,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943361536] [2021-05-06 02:37:55,418 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:55,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215283961] [2021-05-06 02:37:55,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215283961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:55,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:55,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:37:55,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292953989] [2021-05-06 02:37:55,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:37:55,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:37:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:37:55,422 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:37:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:56,038 INFO L93 Difference]: Finished difference Result 183 states and 236 transitions. [2021-05-06 02:37:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 02:37:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 02:37:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:56,040 INFO L225 Difference]: With dead ends: 183 [2021-05-06 02:37:56,040 INFO L226 Difference]: Without dead ends: 181 [2021-05-06 02:37:56,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-06 02:37:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-06 02:37:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2021-05-06 02:37:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 101 states have internal predecessors, (106), 58 states have call successors, (58), 16 states have call predecessors, (58), 15 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-06 02:37:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2021-05-06 02:37:56,064 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 79 [2021-05-06 02:37:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:56,064 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2021-05-06 02:37:56,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:37:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2021-05-06 02:37:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 02:37:56,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:56,066 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1] [2021-05-06 02:37:56,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:37:56,285 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2021-05-06 02:37:56,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:56,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535218121] [2021-05-06 02:37:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:56,296 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:56,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952049532] [2021-05-06 02:37:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:56,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 02:37:56,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:56,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 02:37:56,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:56,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535218121] [2021-05-06 02:37:56,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:56,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952049532] [2021-05-06 02:37:56,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952049532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:56,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:56,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:37:56,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541221178] [2021-05-06 02:37:56,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:37:56,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:56,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:37:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:56,816 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:37:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:57,459 INFO L93 Difference]: Finished difference Result 177 states and 225 transitions. [2021-05-06 02:37:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:37:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 02:37:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:57,462 INFO L225 Difference]: With dead ends: 177 [2021-05-06 02:37:57,462 INFO L226 Difference]: Without dead ends: 118 [2021-05-06 02:37:57,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:37:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-06 02:37:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-06 02:37:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 65 states have (on average 1.123076923076923) internal successors, (73), 69 states have internal predecessors, (73), 43 states have call successors, (43), 10 states have call predecessors, (43), 9 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:37:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2021-05-06 02:37:57,482 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 86 [2021-05-06 02:37:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:57,482 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2021-05-06 02:37:57,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:37:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2021-05-06 02:37:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:37:57,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:57,483 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 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] [2021-05-06 02:37:57,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:37:57,703 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 2 times [2021-05-06 02:37:57,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:57,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404602602] [2021-05-06 02:37:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:57,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:57,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70073542] [2021-05-06 02:37:57,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:57,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:57,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:57,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-06 02:37:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 02:37:58,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404602602] [2021-05-06 02:37:58,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70073542] [2021-05-06 02:37:58,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70073542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:58,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:58,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:37:58,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958385863] [2021-05-06 02:37:58,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:37:58,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:58,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:37:58,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:58,307 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:37:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:58,945 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2021-05-06 02:37:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:37:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 02:37:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:58,962 INFO L225 Difference]: With dead ends: 187 [2021-05-06 02:37:58,962 INFO L226 Difference]: Without dead ends: 184 [2021-05-06 02:37:58,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 367.1ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:37:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-06 02:37:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-05-06 02:37:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 104 states have internal predecessors, (113), 67 states have call successors, (67), 14 states have call predecessors, (67), 13 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2021-05-06 02:37:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 245 transitions. [2021-05-06 02:37:58,993 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 245 transitions. Word has length 91 [2021-05-06 02:37:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:58,993 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 245 transitions. [2021-05-06 02:37:58,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:37:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 245 transitions. [2021-05-06 02:37:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:37:58,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:58,995 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:37:59,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:59,209 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash 844095065, now seen corresponding path program 2 times [2021-05-06 02:37:59,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:59,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003904001] [2021-05-06 02:37:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:59,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:59,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396657906] [2021-05-06 02:37:59,217 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:59,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:59,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:37:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:59,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-05-06 02:37:59,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:59,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003904001] [2021-05-06 02:37:59,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:59,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396657906] [2021-05-06 02:37:59,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396657906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:59,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:59,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:37:59,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698822970] [2021-05-06 02:37:59,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:37:59,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:37:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:37:59,608 INFO L87 Difference]: Start difference. First operand 180 states and 245 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:38:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:00,043 INFO L93 Difference]: Finished difference Result 308 states and 418 transitions. [2021-05-06 02:38:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:38:00,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 02:38:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:00,047 INFO L225 Difference]: With dead ends: 308 [2021-05-06 02:38:00,047 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 02:38:00,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:38:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 02:38:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-05-06 02:38:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 98 states have internal predecessors, (104), 54 states have call successors, (54), 14 states have call predecessors, (54), 13 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-06 02:38:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 210 transitions. [2021-05-06 02:38:00,096 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 210 transitions. Word has length 101 [2021-05-06 02:38:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:00,096 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 210 transitions. [2021-05-06 02:38:00,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:38:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 210 transitions. [2021-05-06 02:38:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:38:00,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:00,097 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-06 02:38:00,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:00,317 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:00,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1212900047, now seen corresponding path program 1 times [2021-05-06 02:38:00,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:00,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168151633] [2021-05-06 02:38:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:00,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:00,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435595688] [2021-05-06 02:38:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:38:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:00,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-05-06 02:38:00,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168151633] [2021-05-06 02:38:00,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435595688] [2021-05-06 02:38:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435595688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:00,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:00,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:38:00,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54337816] [2021-05-06 02:38:00,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:38:00,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:38:00,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:38:00,734 INFO L87 Difference]: Start difference. First operand 162 states and 210 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:38:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:01,281 INFO L93 Difference]: Finished difference Result 237 states and 319 transitions. [2021-05-06 02:38:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:38:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 104 [2021-05-06 02:38:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:01,284 INFO L225 Difference]: With dead ends: 237 [2021-05-06 02:38:01,284 INFO L226 Difference]: Without dead ends: 172 [2021-05-06 02:38:01,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:38:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-06 02:38:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 149. [2021-05-06 02:38:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 89 states have (on average 1.101123595505618) internal successors, (98), 92 states have internal predecessors, (98), 46 states have call successors, (46), 14 states have call predecessors, (46), 13 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:38:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2021-05-06 02:38:01,309 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 104 [2021-05-06 02:38:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:01,309 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2021-05-06 02:38:01,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:38:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2021-05-06 02:38:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 02:38:01,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:01,312 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1] [2021-05-06 02:38:01,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:38:01,533 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 3 times [2021-05-06 02:38:01,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:01,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108903709] [2021-05-06 02:38:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:01,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:01,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324784325] [2021-05-06 02:38:01,540 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:01,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:38:01,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:01,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:38:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:01,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-05-06 02:38:01,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:01,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108903709] [2021-05-06 02:38:01,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:01,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324784325] [2021-05-06 02:38:01,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324784325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:01,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:01,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:38:01,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689379827] [2021-05-06 02:38:01,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:38:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:01,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:38:01,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:38:01,864 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:38:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:02,282 INFO L93 Difference]: Finished difference Result 182 states and 237 transitions. [2021-05-06 02:38:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 02:38:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 116 [2021-05-06 02:38:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:02,288 INFO L225 Difference]: With dead ends: 182 [2021-05-06 02:38:02,289 INFO L226 Difference]: Without dead ends: 172 [2021-05-06 02:38:02,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:38:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-06 02:38:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2021-05-06 02:38:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 88 states have internal predecessors, (93), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:38:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2021-05-06 02:38:02,312 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 116 [2021-05-06 02:38:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:02,313 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2021-05-06 02:38:02,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:38:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2021-05-06 02:38:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-06 02:38:02,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:02,314 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 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] [2021-05-06 02:38:02,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:38:02,538 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2089528091, now seen corresponding path program 2 times [2021-05-06 02:38:02,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:02,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136671325] [2021-05-06 02:38:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:02,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:02,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462594359] [2021-05-06 02:38:02,545 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:02,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:02,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:38:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:02,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 183 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-06 02:38:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136671325] [2021-05-06 02:38:02,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462594359] [2021-05-06 02:38:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462594359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:02,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:02,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:38:02,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351863857] [2021-05-06 02:38:02,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:38:02,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:02,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:38:02,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:38:02,942 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:38:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:03,143 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2021-05-06 02:38:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:38:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 119 [2021-05-06 02:38:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:03,143 INFO L225 Difference]: With dead ends: 153 [2021-05-06 02:38:03,143 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:38:03,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:38:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:38:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:38:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:38:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:38:03,145 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 119 [2021-05-06 02:38:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:03,145 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:38:03,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:38:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:38:03,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:38:03,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:03,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:38:03,556 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 151 [2021-05-06 02:38:03,671 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 151 [2021-05-06 02:38:03,787 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 151 [2021-05-06 02:38:04,090 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 155 [2021-05-06 02:38:04,214 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 158 [2021-05-06 02:38:04,822 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 80 [2021-05-06 02:38:05,590 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2021-05-06 02:38:06,219 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2021-05-06 02:38:06,800 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2021-05-06 02:38:07,392 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 84 [2021-05-06 02:38:07,925 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2021-05-06 02:38:08,580 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 58 [2021-05-06 02:38:08,766 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-05-06 02:38:08,769 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:38:08,769 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:38:08,769 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:38:08,769 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:38:08,769 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:38:08,769 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:38:08,769 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:38:08,769 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:38:08,769 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:38:08,769 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:38:08,770 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:38:08,770 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:38:08,770 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:38:08,770 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:38:08,770 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse7 (< (* 2 main_~c~0) 2)) (.cse4 (<= main_~x~0 2)) (.cse10 (= main_~r~0 0)) (.cse2 (<= 0 main_~c~0)) (.cse3 (< main_~b~0 main_~a~0)) (.cse8 (+ (* main_~r~0 2) main_~s~0)) (.cse5 (<= 0 main_~b~0)) (.cse13 (<= main_~y~0 2)) (.cse0 (= main_~p~0 0)) (.cse11 (<= 1 main_~x~0)) (.cse1 (= main_~r~0 1)) (.cse12 (<= 1 main_~b~0)) (.cse9 (= main_~q~0 1)) (.cse6 (= main_~a~0 main_~y~0))) (or (and .cse0 (= main_~x~0 (+ main_~y~0 main_~b~0)) .cse1 .cse2 (= (+ main_~p~0 main_~q~0) 1) .cse3 .cse4 .cse5 .cse6 .cse7 (= (+ main_~s~0 1) 0)) (and .cse0 (= .cse8 0) .cse1 .cse2 .cse3 .cse4 (<= (* 2 main_~y~0) main_~x~0) .cse9 .cse6 .cse7 (= (+ (* main_~y~0 2) main_~b~0) main_~x~0)) (and .cse10 (= main_~q~0 0) .cse11 (= main_~b~0 main_~y~0) (<= main_~a~0 main_~x~0) .cse4 .cse12 .cse13 (= main_~p~0 1) (= main_~s~0 1) (<= main_~x~0 main_~a~0)) (and .cse10 (< (+ (div (+ (* main_~c~0 (- 1)) 2) (- 2)) main_~c~0) 0) (<= 0 main_~x~0) .cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse3 (= .cse8 1) .cse5 (<= 1 (div main_~v~0 2)) .cse13 (= (+ (* main_~p~0 2) main_~q~0) 0) (= main_~y~0 (+ (* main_~a~0 2) main_~b~0))) (and (<= 1 main_~c~0) .cse0 .cse11 (< main_~x~0 main_~a~0) .cse1 (= main_~s~0 0) (< main_~b~0 2) (<= main_~a~0 2) .cse12 (< main_~c~0 2) .cse9 .cse6))) [2021-05-06 02:38:08,770 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~r~0 1)) (.cse4 (= main_~a~0 main_~y~0)) (.cse7 (< (* 2 main_~b~0) 2)) (.cse5 (<= 1 main_~x~0)) (.cse9 (< main_~b~0 main_~a~0)) (.cse6 (<= main_~x~0 2)) (.cse8 (+ (* main_~r~0 2) main_~s~0)) (.cse10 (<= 0 main_~b~0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (<= main_~y~0 2))) (or (and .cse0 (= main_~x~0 (+ main_~y~0 main_~b~0)) .cse1 (= (+ main_~p~0 main_~q~0) 1) (= main_~y~0 main_~x~0) .cse2 .cse3 .cse4 (= (+ main_~s~0 1) 0)) (and .cse0 .cse5 .cse1 .cse6 (= main_~q~0 1) .cse3 .cse7 (= .cse8 0) .cse9 .cse10 .cse2 .cse4 (= (+ (* main_~y~0 2) main_~b~0) main_~x~0)) (and .cse7 (= main_~r~0 0) .cse5 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse9 .cse6 (= .cse8 1) .cse10 .cse2 .cse3 (= (+ (* main_~p~0 2) main_~q~0) 0) (= main_~y~0 (+ (* main_~a~0 2) main_~b~0))))) [2021-05-06 02:38:08,770 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:38:08,771 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (let ((.cse6 (= main_~p~0 0)) (.cse7 (= main_~r~0 1)) (.cse8 (= main_~s~0 0)) (.cse19 (< main_~b~0 main_~a~0)) (.cse10 (= main_~q~0 1)) (.cse11 (= main_~a~0 main_~y~0)) (.cse12 (= main_~r~0 0)) (.cse13 (= main_~q~0 0)) (.cse14 (= main_~b~0 main_~y~0)) (.cse15 (= main_~a~0 main_~x~0)) (.cse16 (<= 1 main_~y~0)) (.cse17 (= main_~p~0 1)) (.cse18 (<= main_~b~0 main_~x~0)) (.cse5 (= main_~s~0 1))) (let ((.cse2 (<= main_~a~0 2)) (.cse0 (or (and .cse6 .cse7 (= main_~b~0 main_~x~0) .cse8 (<= 0 main_~x~0) .cse19 .cse10 .cse11) (and .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse5))) (.cse1 (= main_~k~0 0)) (.cse9 (<= 1 main_~b~0)) (.cse3 (= main_~c~0 main_~a~0)) (.cse4 (= main_~d~0 1))) (or (and .cse0 .cse1 (= main_~b~0 main_~v~0) .cse2 .cse3 .cse4 .cse5) (and (or (and .cse6 (<= 1 main_~x~0) (< main_~x~0 main_~a~0) .cse7 .cse1 .cse8 .cse9 .cse3 .cse10 .cse11) (and .cse12 .cse13 .cse1 .cse14 .cse15 .cse3 .cse16 .cse17 .cse18 .cse5)) (= main_~d~0 2) .cse19 .cse2 (= main_~v~0 (* main_~b~0 2))) (and (< main_~v~0 2) .cse0 .cse1 (<= main_~c~0 2) (< main_~b~0 2) (<= 1 main_~v~0) .cse9 .cse3 .cse4)))) [2021-05-06 02:38:08,771 INFO L198 CegarLoopUtils]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-05-06 02:38:08,771 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2021-05-06 02:38:08,771 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2) (<= 0 main_~y~0) (<= main_~y~0 2)) [2021-05-06 02:38:08,771 INFO L198 CegarLoopUtils]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:38:08,771 INFO L194 CegarLoopUtils]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~r~0 1)) (.cse3 (= main_~s~0 0)) (.cse6 (= main_~q~0 1)) (.cse7 (= main_~a~0 main_~y~0)) (.cse8 (= main_~r~0 0)) (.cse9 (= main_~q~0 0)) (.cse10 (= main_~b~0 main_~y~0)) (.cse11 (= main_~a~0 main_~x~0)) (.cse12 (<= 1 main_~y~0)) (.cse13 (= main_~p~0 1)) (.cse14 (<= main_~b~0 main_~x~0)) (.cse15 (= main_~s~0 1))) (let ((.cse16 (<= main_~a~0 2)) (.cse17 (or (and .cse0 .cse1 (= main_~b~0 main_~x~0) .cse3 (<= 0 main_~x~0) (< main_~b~0 main_~a~0) .cse6 .cse7) (and .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15))) (.cse2 (= main_~k~0 0)) (.cse4 (<= 1 main_~b~0)) (.cse5 (= main_~c~0 main_~a~0)) (.cse18 (= main_~d~0 1))) (or (and (or (and .cse0 (<= 1 main_~x~0) (< main_~x~0 main_~a~0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse8 .cse9 .cse2 .cse10 .cse11 .cse5 .cse12 .cse13 .cse14 .cse15)) (= main_~d~0 2) .cse16 (= main_~v~0 (* main_~b~0 2)) (<= main_~v~0 main_~c~0)) (and .cse17 .cse2 (= main_~b~0 main_~v~0) .cse16 .cse5 .cse18 .cse15) (and (< main_~v~0 2) .cse17 .cse2 (<= main_~c~0 2) (< main_~b~0 2) (<= 1 main_~v~0) .cse4 .cse5 .cse18)))) [2021-05-06 02:38:08,771 INFO L198 CegarLoopUtils]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:38:08,771 INFO L198 CegarLoopUtils]: For program point L74(line 74) no Hoare annotation was computed. [2021-05-06 02:38:08,771 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 2) (<= 0 main_~y~0) (<= main_~y~0 2)) [2021-05-06 02:38:08,771 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~r~0 1)) (.cse3 (= main_~s~0 0)) (.cse6 (= main_~q~0 1)) (.cse7 (= main_~a~0 main_~y~0)) (.cse8 (= main_~r~0 0)) (.cse9 (= main_~q~0 0)) (.cse10 (= main_~b~0 main_~y~0)) (.cse11 (= main_~a~0 main_~x~0)) (.cse12 (<= 1 main_~y~0)) (.cse13 (= main_~p~0 1)) (.cse14 (<= main_~b~0 main_~x~0)) (.cse15 (= main_~s~0 1))) (let ((.cse16 (<= main_~a~0 2)) (.cse17 (or (and .cse0 .cse1 (= main_~b~0 main_~x~0) .cse3 (<= 0 main_~x~0) (< main_~b~0 main_~a~0) .cse6 .cse7) (and .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15))) (.cse2 (= main_~k~0 0)) (.cse4 (<= 1 main_~b~0)) (.cse5 (= main_~c~0 main_~a~0)) (.cse18 (= main_~d~0 1))) (or (and (or (and .cse0 (<= 1 main_~x~0) (< main_~x~0 main_~a~0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse8 .cse9 .cse2 .cse10 .cse11 .cse5 .cse12 .cse13 .cse14 .cse15)) (= main_~d~0 2) .cse16 (= main_~v~0 (* main_~b~0 2)) (<= main_~v~0 main_~c~0)) (and .cse17 .cse2 (= main_~b~0 main_~v~0) .cse16 .cse5 .cse18 .cse15) (and (< main_~v~0 2) .cse17 .cse2 (<= main_~c~0 2) (< main_~b~0 2) (<= 1 main_~v~0) .cse4 .cse5 .cse18)))) [2021-05-06 02:38:08,772 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~r~0 1)) (.cse3 (= main_~s~0 0)) (.cse6 (= main_~q~0 1)) (.cse7 (= main_~a~0 main_~y~0)) (.cse8 (= main_~r~0 0)) (.cse9 (= main_~q~0 0)) (.cse10 (= main_~b~0 main_~y~0)) (.cse11 (= main_~a~0 main_~x~0)) (.cse12 (<= 1 main_~y~0)) (.cse13 (= main_~p~0 1)) (.cse14 (<= main_~b~0 main_~x~0)) (.cse15 (= main_~s~0 1))) (let ((.cse16 (<= main_~a~0 2)) (.cse17 (or (and .cse0 .cse1 (= main_~b~0 main_~x~0) .cse3 (<= 0 main_~x~0) (< main_~b~0 main_~a~0) .cse6 .cse7) (and .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15))) (.cse2 (= main_~k~0 0)) (.cse4 (<= 1 main_~b~0)) (.cse5 (= main_~c~0 main_~a~0)) (.cse18 (= main_~d~0 1))) (or (and (or (and .cse0 (<= 1 main_~x~0) (< main_~x~0 main_~a~0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse8 .cse9 .cse2 .cse10 .cse11 .cse5 .cse12 .cse13 .cse14 .cse15)) (= main_~d~0 2) .cse16 (= main_~v~0 (* main_~b~0 2)) (<= main_~v~0 main_~c~0)) (and .cse17 .cse2 (= main_~b~0 main_~v~0) .cse16 .cse5 .cse18 .cse15) (and (< main_~v~0 2) .cse17 .cse2 (<= main_~c~0 2) (< main_~b~0 2) (<= 1 main_~v~0) .cse4 .cse5 .cse18)))) [2021-05-06 02:38:08,772 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:38:08,772 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse7 (* main_~b~0 2)) (.cse9 (= main_~r~0 0)) (.cse8 (let ((.cse23 (<= main_~y~0 main_~b~0)) (.cse24 (<= 1 main_~y~0))) (or (and .cse23 (<= 0 main_~x~0) .cse24 (<= main_~c~0 main_~a~0) (<= main_~y~0 2)) (and .cse23 (<= main_~y~0 main_~a~0) .cse24)))) (.cse10 (= main_~q~0 0)) (.cse12 (= main_~b~0 main_~y~0)) (.cse14 (<= main_~a~0 main_~x~0)) (.cse16 (= main_~p~0 1)) (.cse4 (= main_~s~0 1)) (.cse17 (<= main_~x~0 main_~a~0)) (.cse18 (= main_~p~0 0)) (.cse11 (<= 1 main_~x~0)) (.cse19 (= main_~r~0 1)) (.cse20 (= main_~s~0 0)) (.cse21 (= main_~q~0 1)) (.cse22 (= main_~a~0 main_~y~0))) (let ((.cse0 (or (and .cse9 .cse8 .cse10 .cse12 .cse14 .cse16 (<= main_~b~0 main_~x~0) .cse4 .cse17) (and .cse18 .cse11 .cse19 (= main_~b~0 main_~x~0) .cse20 (< main_~b~0 main_~a~0) .cse21 .cse22))) (.cse1 (= main_~b~0 main_~v~0)) (.cse3 (= main_~d~0 1)) (.cse5 (+ .cse7 main_~c~0)) (.cse2 (<= main_~a~0 2)) (.cse6 (= main_~k~0 2)) (.cse13 (= main_~k~0 0)) (.cse15 (= main_~c~0 main_~a~0))) (or (and .cse0 (= main_~x~0 (+ main_~b~0 main_~c~0)) (= main_~k~0 1) .cse1 .cse2 .cse3 (< (* 2 main_~c~0) 2) .cse4) (and .cse0 (<= 0 main_~c~0) (<= (div (* main_~v~0 (- 1)) (- 2)) main_~b~0) .cse2 (= .cse5 main_~y~0) (<= 1 (div main_~v~0 2)) .cse6) (and (or (and .cse0 (= main_~d~0 2) (= main_~v~0 .cse7)) (and .cse0 .cse1 .cse3)) (= .cse5 main_~x~0) .cse2 (<= (* 2 main_~b~0) main_~x~0) .cse6) (and .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 (<= main_~x~0 2) .cse15 .cse16 .cse4 .cse17) (and .cse18 .cse11 (< main_~x~0 main_~a~0) .cse19 .cse13 (<= main_~c~0 2) .cse20 (< main_~b~0 2) (<= 1 main_~b~0) .cse15 .cse21 .cse22)))) [2021-05-06 02:38:08,772 INFO L198 CegarLoopUtils]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-05-06 02:38:08,772 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2021-05-06 02:38:08,772 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:38:08,772 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:38:08,772 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:38:08,773 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (= main_~p~0 0)) (.cse1 (= main_~r~0 1)) (.cse3 (= main_~s~0 0)) (.cse6 (= main_~q~0 1)) (.cse7 (= main_~a~0 main_~y~0)) (.cse8 (= main_~r~0 0)) (.cse9 (= main_~q~0 0)) (.cse10 (= main_~b~0 main_~y~0)) (.cse11 (= main_~a~0 main_~x~0)) (.cse12 (<= 1 main_~y~0)) (.cse13 (= main_~p~0 1)) (.cse14 (<= main_~b~0 main_~x~0)) (.cse15 (= main_~s~0 1))) (let ((.cse16 (<= main_~a~0 2)) (.cse17 (or (and .cse0 .cse1 (= main_~b~0 main_~x~0) .cse3 (<= 0 main_~x~0) (< main_~b~0 main_~a~0) .cse6 .cse7) (and .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15))) (.cse2 (= main_~k~0 0)) (.cse4 (<= 1 main_~b~0)) (.cse5 (= main_~c~0 main_~a~0)) (.cse18 (= main_~d~0 1))) (or (and (or (and .cse0 (<= 1 main_~x~0) (< main_~x~0 main_~a~0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse8 .cse9 .cse2 .cse10 .cse11 .cse5 .cse12 .cse13 .cse14 .cse15)) (= main_~d~0 2) .cse16 (= main_~v~0 (* main_~b~0 2)) (<= main_~v~0 main_~c~0)) (and .cse17 .cse2 (= main_~b~0 main_~v~0) .cse16 .cse5 .cse18 .cse15) (and (< main_~v~0 2) .cse17 .cse2 (<= main_~c~0 2) (< main_~b~0 2) (<= 1 main_~v~0) .cse4 .cse5 .cse18)))) [2021-05-06 02:38:08,773 INFO L198 CegarLoopUtils]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-05-06 02:38:08,773 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:38:08,773 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:38:08,773 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:38:08,773 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:38:08,773 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:38:08,773 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:38:08,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:38:08 BoogieIcfgContainer [2021-05-06 02:38:08,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:38:08,793 INFO L168 Benchmark]: Toolchain (without parser) took 26770.55 ms. Allocated memory was 205.5 MB in the beginning and 429.9 MB in the end (delta: 224.4 MB). Free memory was 170.0 MB in the beginning and 387.8 MB in the end (delta: -217.8 MB). Peak memory consumption was 240.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:08,793 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 205.5 MB. Free memory is still 186.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:38:08,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.23 ms. Allocated memory is still 205.5 MB. Free memory was 169.8 MB in the beginning and 159.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:08,793 INFO L168 Benchmark]: Boogie Preprocessor took 69.68 ms. Allocated memory is still 205.5 MB. Free memory was 159.6 MB in the beginning and 188.6 MB in the end (delta: -29.0 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:08,794 INFO L168 Benchmark]: RCFGBuilder took 410.08 ms. Allocated memory is still 205.5 MB. Free memory was 188.6 MB in the beginning and 170.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:08,794 INFO L168 Benchmark]: TraceAbstraction took 26087.24 ms. Allocated memory was 205.5 MB in the beginning and 429.9 MB in the end (delta: 224.4 MB). Free memory was 170.8 MB in the beginning and 387.8 MB in the end (delta: -217.0 MB). Peak memory consumption was 241.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:38:08,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 205.5 MB. Free memory is still 186.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 199.23 ms. Allocated memory is still 205.5 MB. Free memory was 169.8 MB in the beginning and 159.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.68 ms. Allocated memory is still 205.5 MB. Free memory was 159.6 MB in the beginning and 188.6 MB in the end (delta: -29.0 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 410.08 ms. Allocated memory is still 205.5 MB. Free memory was 188.6 MB in the beginning and 170.8 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26087.24 ms. Allocated memory was 205.5 MB in the beginning and 429.9 MB in the end (delta: 224.4 MB). Free memory was 170.8 MB in the beginning and 387.8 MB in the end (delta: -217.0 MB). Peak memory consumption was 241.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20576.9ms, OverallIterations: 23, TraceHistogramMax: 13, EmptinessCheckTime: 39.0ms, AutomataDifference: 7418.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 5422.5ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1156 SDtfs, 1192 SDslu, 6133 SDs, 0 SdLazy, 4919 SolverSat, 1090 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3374.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1638 GetRequests, 1289 SyntacticMatches, 7 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 4212.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=14, InterpolantAutomatonStates: 273, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 553.7ms AutomataMinimizationTime, 23 MinimizatonAttempts, 407 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 255 PreInvPairs, 311 NumberOfFragments, 2064 HoareAnnotationTreeSize, 255 FomulaSimplifications, 68525 FormulaSimplificationTreeSizeReduction, 879.6ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 30353 FormulaSimplificationTreeSizeReductionInter, 4523.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 211.1ms SsaConstructionTime, 663.1ms SatisfiabilityAnalysisTime, 5708.2ms InterpolantComputationTime, 1524 NumberOfCodeBlocks, 1477 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1501 ConstructedInterpolants, 0 QuantifiedInterpolants, 6100 SizeOfPredicates, 144 NumberOfNonLiveVariables, 4775 ConjunctsInSsa, 552 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 2269/2491 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: 35]: Loop Invariant Derived loop invariant: (((((((((((((p == 0 && x == y + b) && r == 1) && 0 <= c) && p + q == 1) && b < a) && x <= 2) && 0 <= b) && a == y) && 2 * c < 2) && s + 1 == 0) || ((((((((((p == 0 && r * 2 + s == 0) && r == 1) && 0 <= c) && b < a) && x <= 2) && 2 * y <= x) && q == 1) && a == y) && 2 * c < 2) && y * 2 + b == x)) || ((((((((((r == 0 && q == 0) && 1 <= x) && b == y) && a <= x) && x <= 2) && 1 <= b) && y <= 2) && p == 1) && s == 1) && x <= a)) || (((((((((((r == 0 && (c * -1 + 2) / -2 + c < 0) && 0 <= x) && 0 <= c) && a == y * r + x * p) && b < a) && r * 2 + s == 1) && 0 <= b) && 1 <= v / 2) && y <= 2) && p * 2 + q == 0) && y == a * 2 + b)) || (((((((((((1 <= c && p == 0) && 1 <= x) && x < a) && r == 1) && s == 0) && b < 2) && a <= 2) && 1 <= b) && c < 2) && q == 1) && a == y) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((((((((((((r == 0 && (((((y <= b && 0 <= x) && 1 <= y) && c <= a) && y <= 2) || ((y <= b && y <= a) && 1 <= y))) && q == 0) && b == y) && a <= x) && p == 1) && b <= x) && s == 1) && x <= a) || (((((((p == 0 && 1 <= x) && r == 1) && b == x) && s == 0) && b < a) && q == 1) && a == y)) && x == b + c) && k == 1) && b == v) && a <= 2) && d == 1) && 2 * c < 2) && s == 1) || (((((((((((((((r == 0 && (((((y <= b && 0 <= x) && 1 <= y) && c <= a) && y <= 2) || ((y <= b && y <= a) && 1 <= y))) && q == 0) && b == y) && a <= x) && p == 1) && b <= x) && s == 1) && x <= a) || (((((((p == 0 && 1 <= x) && r == 1) && b == x) && s == 0) && b < a) && q == 1) && a == y)) && 0 <= c) && v * -1 / -2 <= b) && a <= 2) && b * 2 + c == y) && 1 <= v / 2) && k == 2)) || ((((((((((((((((r == 0 && (((((y <= b && 0 <= x) && 1 <= y) && c <= a) && y <= 2) || ((y <= b && y <= a) && 1 <= y))) && q == 0) && b == y) && a <= x) && p == 1) && b <= x) && s == 1) && x <= a) || (((((((p == 0 && 1 <= x) && r == 1) && b == x) && s == 0) && b < a) && q == 1) && a == y)) && d == 2) && v == b * 2) || (((((((((((r == 0 && (((((y <= b && 0 <= x) && 1 <= y) && c <= a) && y <= 2) || ((y <= b && y <= a) && 1 <= y))) && q == 0) && b == y) && a <= x) && p == 1) && b <= x) && s == 1) && x <= a) || (((((((p == 0 && 1 <= x) && r == 1) && b == x) && s == 0) && b < a) && q == 1) && a == y)) && b == v) && d == 1)) && b * 2 + c == x) && a <= 2) && 2 * b <= x) && k == 2)) || ((((((((((((((((y <= b && 0 <= x) && 1 <= y) && c <= a) && y <= 2) || ((y <= b && y <= a) && 1 <= y)) && r == 0) && q == 0) && 1 <= x) && b == y) && k == 0) && a <= x) && x <= 2) && c == a) && p == 1) && s == 1) && x <= a)) || (((((((((((p == 0 && 1 <= x) && x < a) && r == 1) && k == 0) && c <= 2) && s == 0) && b < 2) && 1 <= b) && c == a) && q == 1) && a == y) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((((p == 0 && 1 <= x) && x < a) && r == 1) && k == 0) && s == 0) && 1 <= b) && c == a) && q == 1) && a == y) || (((((((((r == 0 && q == 0) && k == 0) && b == y) && a == x) && c == a) && 1 <= y) && p == 1) && b <= x) && s == 1)) && d == 2) && a <= 2) && v == b * 2) && v <= c) || ((((((((((((((p == 0 && r == 1) && b == x) && s == 0) && 0 <= x) && b < a) && q == 1) && a == y) || (((((((r == 0 && q == 0) && b == y) && a == x) && 1 <= y) && p == 1) && b <= x) && s == 1)) && k == 0) && b == v) && a <= 2) && c == a) && d == 1) && s == 1)) || ((((((((v < 2 && ((((((((p == 0 && r == 1) && b == x) && s == 0) && 0 <= x) && b < a) && q == 1) && a == y) || (((((((r == 0 && q == 0) && b == y) && a == x) && 1 <= y) && p == 1) && b <= x) && s == 1))) && k == 0) && c <= 2) && b < 2) && 1 <= v) && 1 <= b) && c == a) && d == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...