/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/hard-u_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:30:43,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:30:43,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:30:43,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:30:43,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:30:43,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:30:43,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:30:43,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:30:43,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:30:43,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:30:43,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:30:43,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:30:43,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:30:43,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:30:43,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:30:43,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:30:43,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:30:43,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:30:43,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:30:43,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:30:43,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:30:43,129 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:30:43,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:30:43,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:30:43,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:30:43,131 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:30:43,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:30:43,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:30:43,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:30:43,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:30:43,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:30:43,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:30:43,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:30:43,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:30:43,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:30:43,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:30:43,133 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:30:43,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:30:43,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:30:43,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:30:43,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:30:43,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:30:43,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:30:43,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:30:43,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:30:43,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:30:43,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:30:43,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:30:43,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:30:43,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:30:43,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:30:43,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:30:43,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:30:43,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:30:43,433 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:30:43,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2021-05-02 15:30:43,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1515ce042/0104fc66f54b459c80c0e4ca2e0f148d/FLAG591a81031 [2021-05-02 15:30:43,871 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:30:43,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2021-05-02 15:30:43,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1515ce042/0104fc66f54b459c80c0e4ca2e0f148d/FLAG591a81031 [2021-05-02 15:30:44,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1515ce042/0104fc66f54b459c80c0e4ca2e0f148d [2021-05-02 15:30:44,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:30:44,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:30:44,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:30:44,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:30:44,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:30:44,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7481a937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44, skipping insertion in model container [2021-05-02 15:30:44,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:30:44,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:30:44,381 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/hard-u_unwindbound5.c[545,558] [2021-05-02 15:30:44,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:30:44,395 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:30:44,439 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/hard-u_unwindbound5.c[545,558] [2021-05-02 15:30:44,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:30:44,464 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:30:44,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44 WrapperNode [2021-05-02 15:30:44,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:30:44,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:30:44,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:30:44,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:30:44,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... [2021-05-02 15:30:44,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:30:44,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:30:44,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:30:44,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:30:44,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:30:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:30:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:30:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:30:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:30:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:30:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:30:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:30:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:30:44,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:30:44,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:30:44,778 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:30:44,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:30:44 BoogieIcfgContainer [2021-05-02 15:30:44,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:30:44,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:30:44,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:30:44,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:30:44,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:30:44" (1/3) ... [2021-05-02 15:30:44,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f12a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:30:44, skipping insertion in model container [2021-05-02 15:30:44,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:44" (2/3) ... [2021-05-02 15:30:44,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f12a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:30:44, skipping insertion in model container [2021-05-02 15:30:44,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:30:44" (3/3) ... [2021-05-02 15:30:44,799 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.c [2021-05-02 15:30:44,802 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:30:44,809 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:30:44,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:30:44,866 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:30:44,867 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:30:44,867 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:30:44,867 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:30:44,867 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:30:44,867 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:30:44,867 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:30:44,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:30:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:30:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:30:44,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:44,880 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:44,881 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:30:44,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47635882] [2021-05-02 15:30:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:30:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:45,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:30:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:45,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47635882] [2021-05-02 15:30:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47635882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:45,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:45,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:30:45,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943708428] [2021-05-02 15:30:45,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:30:45,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:30:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:30:45,046 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:45,158 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:30:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:30:45,159 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:30:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:45,164 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:30:45,165 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:30:45,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:30:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:30:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:30:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:30:45,191 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:30:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:45,192 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:30:45,192 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:30:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:30:45,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:45,193 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:45,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:30:45,193 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:45,194 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:30:45,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:45,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872936341] [2021-05-02 15:30:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:45,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:30:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:30:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:45,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:45,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872936341] [2021-05-02 15:30:45,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872936341] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:45,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:45,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:30:45,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440243623] [2021-05-02 15:30:45,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:30:45,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:30:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:45,287 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:45,523 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:30:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:30:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:45,527 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:30:45,527 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:30:45,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:30:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:30:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:30:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:30:45,554 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:30:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:45,554 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:30:45,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:30:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:30:45,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:45,555 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:45,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:30:45,555 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:45,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:30:45,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:45,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641256811] [2021-05-02 15:30:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:45,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:45,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140498412] [2021-05-02 15:30:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:45,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:30:45,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:45,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:45,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:45,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:45,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:45,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641256811] [2021-05-02 15:30:45,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:45,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140498412] [2021-05-02 15:30:45,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140498412] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:45,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:45,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:30:45,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522326944] [2021-05-02 15:30:45,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:30:45,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:45,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:30:45,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:30:45,733 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:30:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:45,750 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:30:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:30:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:30:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:45,751 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:30:45,752 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:30:45,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:30:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:30:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:30:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:30:45,767 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:30:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:45,767 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:30:45,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:30:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:30:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:30:45,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:45,769 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:45,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:30:45,984 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:45,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:45,985 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:30:45,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:45,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837665368] [2021-05-02 15:30:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:46,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:30:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:46,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:30:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:46,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:30:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:46,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:46,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837665368] [2021-05-02 15:30:46,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837665368] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:46,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:46,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:30:46,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512719033] [2021-05-02 15:30:46,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:30:46,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:30:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:46,066 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:30:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:46,241 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:30:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:30:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:46,242 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:30:46,242 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:30:46,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:30:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:30:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:30:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:30:46,247 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:30:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:46,247 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:30:46,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:30:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:30:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:30:46,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:46,248 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:46,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:30:46,248 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:46,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:30:46,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:46,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90631867] [2021-05-02 15:30:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:46,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:46,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630032437] [2021-05-02 15:30:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:30:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:46,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:30:46,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:46,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90631867] [2021-05-02 15:30:46,499 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:46,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630032437] [2021-05-02 15:30:46,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630032437] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:46,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:46,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 15:30:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446478349] [2021-05-02 15:30:46,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:30:46,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:30:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:30:46,500 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:30:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:46,582 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2021-05-02 15:30:46,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:30:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:46,583 INFO L225 Difference]: With dead ends: 71 [2021-05-02 15:30:46,583 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:30:46,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:30:46,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:30:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 15:30:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:30:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 15:30:46,590 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-02 15:30:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:46,590 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 15:30:46,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:30:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 15:30:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:30:46,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:46,591 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:30:46,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:46,808 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:30:46,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:46,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995654256] [2021-05-02 15:30:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:46,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:46,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337333190] [2021-05-02 15:30:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:30:46,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:46,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:30:46,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:46,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995654256] [2021-05-02 15:30:46,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:46,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337333190] [2021-05-02 15:30:46,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337333190] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:46,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:46,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:30:46,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239781435] [2021-05-02 15:30:46,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:30:46,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:46,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:30:46,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:30:46,953 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:46,984 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-02 15:30:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:30:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:30:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:46,986 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:30:46,986 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:30:46,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:30:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:30:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 15:30:46,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:30:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 15:30:46,992 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 15:30:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:46,992 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 15:30:46,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:46,992 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 15:30:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:30:46,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:46,993 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:30:47,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:47,208 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-02 15:30:47,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:47,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301216881] [2021-05-02 15:30:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:47,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:47,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728885748] [2021-05-02 15:30:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:30:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:47,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:30:47,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:47,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301216881] [2021-05-02 15:30:47,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:47,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728885748] [2021-05-02 15:30:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728885748] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:47,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:30:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356168447] [2021-05-02 15:30:47,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:30:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:30:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:30:47,413 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:30:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:47,528 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-02 15:30:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:30:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 15:30:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:47,529 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:30:47,529 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:30:47,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:30:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:30:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:30:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:30:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:30:47,535 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:30:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:47,535 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:30:47,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:30:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:30:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:30:47,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:47,536 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:47,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:47,754 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:30:47,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:47,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945617781] [2021-05-02 15:30:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:47,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:47,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642498682] [2021-05-02 15:30:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:30:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:47,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:30:47,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:47,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945617781] [2021-05-02 15:30:47,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:47,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642498682] [2021-05-02 15:30:47,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642498682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:47,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:47,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:30:47,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827055582] [2021-05-02 15:30:47,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:30:47,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:47,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:30:47,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:30:47,877 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:47,907 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-02 15:30:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:30:47,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 15:30:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:47,908 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:30:47,908 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:30:47,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:30:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:30:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:30:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 15:30:47,913 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 15:30:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:47,913 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 15:30:47,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 15:30:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:30:47,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:47,914 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:48,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:48,130 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:48,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-02 15:30:48,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:48,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527074679] [2021-05-02 15:30:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:48,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:48,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572883847] [2021-05-02 15:30:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:48,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:30:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:48,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 15:30:48,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:48,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527074679] [2021-05-02 15:30:48,526 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:48,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572883847] [2021-05-02 15:30:48,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572883847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:48,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:48,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:30:48,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679808847] [2021-05-02 15:30:48,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:30:48,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:30:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:30:48,527 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:30:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:48,689 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-05-02 15:30:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:30:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 15:30:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:48,691 INFO L225 Difference]: With dead ends: 83 [2021-05-02 15:30:48,691 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 15:30:48,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:30:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 15:30:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 15:30:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:30:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-05-02 15:30:48,698 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 46 [2021-05-02 15:30:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:48,698 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-05-02 15:30:48,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:30:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-05-02 15:30:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:30:48,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:48,699 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 15:30:48,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:48,902 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-02 15:30:48,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:48,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505017298] [2021-05-02 15:30:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:48,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:48,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112003217] [2021-05-02 15:30:48,910 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 [2021-05-02 15:30:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:48,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:30:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:48,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:30:49,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:49,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505017298] [2021-05-02 15:30:49,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:49,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112003217] [2021-05-02 15:30:49,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112003217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:49,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:49,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:30:49,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574114804] [2021-05-02 15:30:49,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:30:49,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:30:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:49,046 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:30:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:49,084 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2021-05-02 15:30:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:30:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 15:30:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:49,085 INFO L225 Difference]: With dead ends: 94 [2021-05-02 15:30:49,085 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:30:49,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:30:49,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 15:30:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:30:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-05-02 15:30:49,092 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 54 [2021-05-02 15:30:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:49,092 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-05-02 15:30:49,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:30:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-05-02 15:30:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:30:49,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:49,093 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 15:30:49,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:30:49,312 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-02 15:30:49,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:49,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750252886] [2021-05-02 15:30:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:49,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:49,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811014123] [2021-05-02 15:30:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:30:49,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:49,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:30:49,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:49,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750252886] [2021-05-02 15:30:49,617 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:49,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811014123] [2021-05-02 15:30:49,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811014123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:49,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:49,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:30:49,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909423614] [2021-05-02 15:30:49,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:30:49,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:49,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:30:49,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:30:49,619 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:30:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:49,716 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2021-05-02 15:30:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:30:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 15:30:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:49,720 INFO L225 Difference]: With dead ends: 99 [2021-05-02 15:30:49,720 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 15:30:49,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:30:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 15:30:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-05-02 15:30:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 63 states have internal predecessors, (71), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:30:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-05-02 15:30:49,734 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 54 [2021-05-02 15:30:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:49,734 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-05-02 15:30:49,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:30:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-05-02 15:30:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:30:49,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:49,737 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:49,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:30:49,941 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-02 15:30:49,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:49,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443621543] [2021-05-02 15:30:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:49,961 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:49,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369728791] [2021-05-02 15:30:49,961 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 [2021-05-02 15:30:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:30:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:50,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 15:30:50,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:50,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443621543] [2021-05-02 15:30:50,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:50,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369728791] [2021-05-02 15:30:50,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369728791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:50,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:50,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:30:50,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632203204] [2021-05-02 15:30:50,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:30:50,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:30:50,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:50,112 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:30:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:50,152 INFO L93 Difference]: Finished difference Result 123 states and 149 transitions. [2021-05-02 15:30:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 15:30:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:50,154 INFO L225 Difference]: With dead ends: 123 [2021-05-02 15:30:50,154 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 15:30:50,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:30:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 15:30:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-02 15:30:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 65 states have internal predecessors, (73), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:30:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2021-05-02 15:30:50,164 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 61 [2021-05-02 15:30:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:50,165 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2021-05-02 15:30:50,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:30:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2021-05-02 15:30:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:30:50,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:50,165 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:50,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:50,383 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-02 15:30:50,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:50,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992184787] [2021-05-02 15:30:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:50,391 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:50,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980975990] [2021-05-02 15:30:50,391 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:50,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:30:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:30:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 15:30:50,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:50,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 15:30:50,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:50,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992184787] [2021-05-02 15:30:50,955 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:50,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980975990] [2021-05-02 15:30:50,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980975990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:50,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:50,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:30:50,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522115496] [2021-05-02 15:30:50,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:30:50,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:50,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:30:50,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:30:50,957 INFO L87 Difference]: Start difference. First operand 98 states and 113 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:30:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:51,365 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2021-05-02 15:30:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:30:51,366 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-02 15:30:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:51,367 INFO L225 Difference]: With dead ends: 125 [2021-05-02 15:30:51,367 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 15:30:51,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:30:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 15:30:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-05-02 15:30:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 69 states have (on average 1.173913043478261) internal successors, (81), 72 states have internal predecessors, (81), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 15:30:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-05-02 15:30:51,373 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 64 [2021-05-02 15:30:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:51,373 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-05-02 15:30:51,373 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, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:30:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-05-02 15:30:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:30:51,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:51,374 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-05-02 15:30:51,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:51,578 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:51,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:51,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-02 15:30:51,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:51,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436057550] [2021-05-02 15:30:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:51,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:51,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381495914] [2021-05-02 15:30:51,584 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 [2021-05-02 15:30:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:30:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:51,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:30:51,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:51,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436057550] [2021-05-02 15:30:51,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:51,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381495914] [2021-05-02 15:30:51,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381495914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:51,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:51,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:30:51,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104996994] [2021-05-02 15:30:51,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:30:51,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:30:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:30:51,747 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:30:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:51,824 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2021-05-02 15:30:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 15:30:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:51,825 INFO L225 Difference]: With dead ends: 146 [2021-05-02 15:30:51,825 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 15:30:51,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:30:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 15:30:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 15:30:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 89 states have internal predecessors, (99), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 15:30:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-05-02 15:30:51,831 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 68 [2021-05-02 15:30:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:51,831 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-05-02 15:30:51,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:30:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-05-02 15:30:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:30:51,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:51,832 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-05-02 15:30:52,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:30:52,049 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:52,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-02 15:30:52,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:52,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873795084] [2021-05-02 15:30:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:52,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:52,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079707537] [2021-05-02 15:30:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 15:30:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 15:30:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:52,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:52,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:53,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:53,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:45,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:45,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873795084] [2021-05-02 15:40:45,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:45,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079707537] [2021-05-02 15:40:45,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -1072721305 [2021-05-02 15:40:45,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:45,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:40:45,722 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:40:45,722 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:40:45,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:40:45,950 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:40:45,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:40:45 BoogieIcfgContainer [2021-05-02 15:40:45,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:40:45,951 INFO L168 Benchmark]: Toolchain (without parser) took 601660.51 ms. Allocated memory was 176.2 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 139.7 MB in the beginning and 6.4 GB in the end (delta: -6.3 GB). Peak memory consumption was 5.8 GB. Max. memory is 8.0 GB. [2021-05-02 15:40:45,951 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 176.2 MB. Free memory is still 157.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:40:45,951 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.18 ms. Allocated memory is still 176.2 MB. Free memory was 139.5 MB in the beginning and 158.8 MB in the end (delta: -19.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:45,951 INFO L168 Benchmark]: Boogie Preprocessor took 31.12 ms. Allocated memory is still 176.2 MB. Free memory was 158.8 MB in the beginning and 157.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:45,951 INFO L168 Benchmark]: RCFGBuilder took 296.97 ms. Allocated memory is still 176.2 MB. Free memory was 157.2 MB in the beginning and 140.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:40:45,951 INFO L168 Benchmark]: TraceAbstraction took 601155.41 ms. Allocated memory was 176.2 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 139.9 MB in the beginning and 6.4 GB in the end (delta: -6.3 GB). Peak memory consumption was 5.8 GB. Max. memory is 8.0 GB. [2021-05-02 15:40:45,951 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 176.2 MB. Free memory is still 157.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 173.18 ms. Allocated memory is still 176.2 MB. Free memory was 139.5 MB in the beginning and 158.8 MB in the end (delta: -19.2 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.12 ms. Allocated memory is still 176.2 MB. Free memory was 158.8 MB in the beginning and 157.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 296.97 ms. Allocated memory is still 176.2 MB. Free memory was 157.2 MB in the beginning and 140.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 601155.41 ms. Allocated memory was 176.2 MB in the beginning and 7.8 GB in the end (delta: 7.6 GB). Free memory was 139.9 MB in the beginning and 6.4 GB in the end (delta: -6.3 GB). Peak memory consumption was 5.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(q == 0) [L37] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(r == A) [L38] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(d == B * p) [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p [L35] EXPR counter++ [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(q == 0) [L37] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(r == A) [L38] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(d == B * p) [L39] COND TRUE !(r >= d) [L45] EXPR counter++ [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(A == q*B + r) [L47] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(d == B*p) [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p [L45] EXPR counter++ [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 601063.2ms, OverallIterations: 15, TraceHistogramMax: 9, EmptinessCheckTime: 15.8ms, AutomataDifference: 1677.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 596 SDtfs, 273 SDslu, 1877 SDs, 0 SdLazy, 1069 SolverSat, 148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1015.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 545 GetRequests, 452 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 631.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=14, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 127.7ms AutomataMinimizationTime, 14 MinimizatonAttempts, 27 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 86.6ms SsaConstructionTime, 708.3ms SatisfiabilityAnalysisTime, 1654.3ms InterpolantComputationTime, 564 NumberOfCodeBlocks, 564 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 2003 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1852 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 438/665 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...