/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:51:10,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:51:10,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:51:10,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:51:10,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:51:10,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:51:10,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:51:10,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:51:10,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:51:10,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:51:10,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:51:10,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:51:10,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:51:10,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:51:10,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:51:10,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:51:10,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:51:10,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:51:10,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:51:10,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:51:10,089 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 13:51:10,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:51:10,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:51:10,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:51:10,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:51:10,119 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:51:10,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:51:10,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:51:10,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:51:10,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:51:10,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:51:10,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:51:10,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:51:10,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:51:10,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:51:10,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:51:10,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:51:10,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:51:10,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:51:10,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:51:10,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:51:10,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:51:10,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:51:10,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:51:10,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:51:10,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:51:10,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:51:10,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:51:10,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:51:10,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:51:10,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:51:10,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:51:10,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:51:10,470 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:51:10,470 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:51:10,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2021-05-02 13:51:10,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5825198/e7486691ab814748b90c87ba027910d4/FLAG197c2c914 [2021-05-02 13:51:11,021 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:51:11,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2021-05-02 13:51:11,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5825198/e7486691ab814748b90c87ba027910d4/FLAG197c2c914 [2021-05-02 13:51:11,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c5825198/e7486691ab814748b90c87ba027910d4 [2021-05-02 13:51:11,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:51:11,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:51:11,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:11,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:51:11,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:51:11,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d98eec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11, skipping insertion in model container [2021-05-02 13:51:11,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:51:11,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:51:11,613 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/prod4br-ll.c[524,537] [2021-05-02 13:51:11,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:11,669 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:51:11,680 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/prod4br-ll.c[524,537] [2021-05-02 13:51:11,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:11,714 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:51:11,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11 WrapperNode [2021-05-02 13:51:11,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:11,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:51:11,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:51:11,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:51:11,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:51:11,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:51:11,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:51:11,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:51:11,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (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 13:51:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:51:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:51:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:51:11,852 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:51:11,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:51:11,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:51:11,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:51:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:51:11,853 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:51:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:51:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:51:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:51:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:51:11,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:51:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:51:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:51:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:51:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:51:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:51:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:51:12,077 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:51:12,077 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:51:12,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:12 BoogieIcfgContainer [2021-05-02 13:51:12,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:51:12,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:51:12,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:51:12,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:51:12,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:51:11" (1/3) ... [2021-05-02 13:51:12,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661308a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:12, skipping insertion in model container [2021-05-02 13:51:12,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (2/3) ... [2021-05-02 13:51:12,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661308a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:12, skipping insertion in model container [2021-05-02 13:51:12,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:12" (3/3) ... [2021-05-02 13:51:12,083 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.c [2021-05-02 13:51:12,103 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:51:12,106 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:51:12,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:51:12,147 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:51:12,147 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:51:12,147 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:51:12,147 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:51:12,147 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:51:12,147 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:51:12,147 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:51:12,148 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:51:12,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:51:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:51:12,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:12,179 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:12,179 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:12,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1051010973, now seen corresponding path program 1 times [2021-05-02 13:51:12,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:12,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453128504] [2021-05-02 13:51:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:51:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:51:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,403 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 13:51:12,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:12,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453128504] [2021-05-02 13:51:12,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453128504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:12,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:12,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:51:12,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328581521] [2021-05-02 13:51:12,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:51:12,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:12,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:51:12,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:12,418 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:51:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:12,499 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2021-05-02 13:51:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:51:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:51:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:12,507 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:51:12,507 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 13:51:12,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 13:51:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 13:51:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:51:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 13:51:12,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 13:51:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:12,552 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 13:51:12,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:51:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 13:51:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:51:12,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:12,554 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:12,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:51:12,554 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1732856803, now seen corresponding path program 1 times [2021-05-02 13:51:12,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:12,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142986476] [2021-05-02 13:51:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:12,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:12,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003838928] [2021-05-02 13:51:12,592 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 13:51:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:51:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:12,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,731 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 13:51:12,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:12,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142986476] [2021-05-02 13:51:12,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:12,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003838928] [2021-05-02 13:51:12,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003838928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:12,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:12,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:51:12,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204367797] [2021-05-02 13:51:12,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:51:12,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:12,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:51:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:51:12,733 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 13:51:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:12,810 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 13:51:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:51:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:51:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:12,811 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:51:12,811 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:51:12,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:51:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:51:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-05-02 13:51:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-02 13:51:12,820 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2021-05-02 13:51:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:12,820 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-02 13:51:12,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 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 13:51:12,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-02 13:51:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:51:12,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:12,821 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 13:51:13,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:51:13,044 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:13,045 INFO L82 PathProgramCache]: Analyzing trace with hash -253409975, now seen corresponding path program 1 times [2021-05-02 13:51:13,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:13,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056303449] [2021-05-02 13:51:13,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:13,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:13,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565425628] [2021-05-02 13:51:13,056 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 13:51:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:51:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:13,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:13,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:13,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056303449] [2021-05-02 13:51:13,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:13,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565425628] [2021-05-02 13:51:13,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565425628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:13,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:13,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:51:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322506923] [2021-05-02 13:51:13,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:51:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:51:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:51:13,386 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:13,602 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-05-02 13:51:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:51:13,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 13:51:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:13,604 INFO L225 Difference]: With dead ends: 46 [2021-05-02 13:51:13,604 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:51:13,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:51:13,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:51:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 13:51:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:51:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-05-02 13:51:13,609 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 23 [2021-05-02 13:51:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:13,610 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-05-02 13:51:13,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-05-02 13:51:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:51:13,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:13,611 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:13,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:13,829 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1855333828, now seen corresponding path program 1 times [2021-05-02 13:51:13,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:13,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379087109] [2021-05-02 13:51:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:13,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:13,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304916900] [2021-05-02 13:51:13,838 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 13:51:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:13,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:51:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:13,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:14,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:14,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379087109] [2021-05-02 13:51:14,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:14,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304916900] [2021-05-02 13:51:14,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304916900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:14,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:14,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:51:14,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136813809] [2021-05-02 13:51:14,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:51:14,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:14,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:51:14,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:51:14,146 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:14,271 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-05-02 13:51:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:51:14,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-02 13:51:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:14,273 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:51:14,273 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 13:51:14,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:51:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 13:51:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2021-05-02 13:51:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:51:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-05-02 13:51:14,279 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 25 [2021-05-02 13:51:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:14,280 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-05-02 13:51:14,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-05-02 13:51:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 13:51:14,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:14,280 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:14,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:14,509 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:14,509 INFO L82 PathProgramCache]: Analyzing trace with hash -482322609, now seen corresponding path program 1 times [2021-05-02 13:51:14,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:14,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63265180] [2021-05-02 13:51:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:14,517 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:14,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083193474] [2021-05-02 13:51:14,517 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 13:51:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:51:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:14,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63265180] [2021-05-02 13:51:14,717 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:14,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083193474] [2021-05-02 13:51:14,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083193474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:14,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:14,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:51:14,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251517468] [2021-05-02 13:51:14,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:51:14,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:14,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:51:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:51:14,718 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:19,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:19,076 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-05-02 13:51:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:51:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 13:51:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:19,077 INFO L225 Difference]: With dead ends: 59 [2021-05-02 13:51:19,077 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 13:51:19,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:51:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 13:51:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-05-02 13:51:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:51:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-05-02 13:51:19,084 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 26 [2021-05-02 13:51:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:19,084 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-05-02 13:51:19,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-05-02 13:51:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:51:19,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:19,084 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:19,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:19,297 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash 207917631, now seen corresponding path program 1 times [2021-05-02 13:51:19,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:19,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341064076] [2021-05-02 13:51:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:19,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:19,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817180865] [2021-05-02 13:51:19,304 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 13:51:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:19,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:51:19,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:19,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:19,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:19,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:19,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:19,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:19,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341064076] [2021-05-02 13:51:19,495 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:19,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817180865] [2021-05-02 13:51:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817180865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:51:19,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361387054] [2021-05-02 13:51:19,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:51:19,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:19,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:51:19,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:51:19,496 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:23,940 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2021-05-02 13:51:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:51:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 13:51:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:23,941 INFO L225 Difference]: With dead ends: 79 [2021-05-02 13:51:23,941 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 13:51:23,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:51:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 13:51:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-05-02 13:51:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 46 states have internal predecessors, (55), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:51:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-05-02 13:51:23,950 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 27 [2021-05-02 13:51:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:23,950 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-05-02 13:51:23,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-05-02 13:51:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:51:23,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:23,951 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:24,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:51:24,167 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:24,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:24,167 INFO L82 PathProgramCache]: Analyzing trace with hash 265175933, now seen corresponding path program 1 times [2021-05-02 13:51:24,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:24,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389555174] [2021-05-02 13:51:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:24,174 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:24,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456588280] [2021-05-02 13:51:24,175 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 13:51:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:24,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:51:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:24,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:24,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:24,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:24,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:24,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:24,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389555174] [2021-05-02 13:51:24,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:24,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456588280] [2021-05-02 13:51:24,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456588280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:24,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:24,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:51:24,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226364729] [2021-05-02 13:51:24,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:51:24,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:24,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:51:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:51:24,370 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:28,795 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-05-02 13:51:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:51:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 13:51:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:28,796 INFO L225 Difference]: With dead ends: 76 [2021-05-02 13:51:28,797 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 13:51:28,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:51:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 13:51:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-05-02 13:51:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 46 states have internal predecessors, (55), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:51:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-05-02 13:51:28,803 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 27 [2021-05-02 13:51:28,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:28,803 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-05-02 13:51:28,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-05-02 13:51:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:51:28,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:28,804 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:29,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:29,017 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:29,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:29,017 INFO L82 PathProgramCache]: Analyzing trace with hash -171609494, now seen corresponding path program 1 times [2021-05-02 13:51:29,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:29,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84107297] [2021-05-02 13:51:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:29,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:29,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605300511] [2021-05-02 13:51:29,033 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 13:51:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:29,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:51:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:29,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:51:29,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:29,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84107297] [2021-05-02 13:51:29,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:29,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605300511] [2021-05-02 13:51:29,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605300511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:29,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:29,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 13:51:29,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176591747] [2021-05-02 13:51:29,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:51:29,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:51:29,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:51:29,167 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:29,243 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2021-05-02 13:51:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:51:29,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 13:51:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:29,246 INFO L225 Difference]: With dead ends: 83 [2021-05-02 13:51:29,246 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 13:51:29,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:51:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 13:51:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-05-02 13:51:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.3) internal successors, (65), 54 states have internal predecessors, (65), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:51:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-05-02 13:51:29,255 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 31 [2021-05-02 13:51:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:29,256 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-05-02 13:51:29,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-05-02 13:51:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:51:29,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:29,256 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:29,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:29,472 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:29,472 INFO L82 PathProgramCache]: Analyzing trace with hash 212948645, now seen corresponding path program 1 times [2021-05-02 13:51:29,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:29,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090319380] [2021-05-02 13:51:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:29,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:29,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194589664] [2021-05-02 13:51:29,478 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 13:51:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:51:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:29,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:51:29,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:29,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090319380] [2021-05-02 13:51:29,749 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:29,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194589664] [2021-05-02 13:51:29,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194589664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:29,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:29,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:51:29,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056186926] [2021-05-02 13:51:29,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:51:29,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:51:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:51:29,751 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:31,988 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2021-05-02 13:51:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:51:31,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 13:51:31,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:31,989 INFO L225 Difference]: With dead ends: 88 [2021-05-02 13:51:31,989 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:51:31,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:51:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:51:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-05-02 13:51:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.290909090909091) internal successors, (71), 60 states have internal predecessors, (71), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 13:51:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2021-05-02 13:51:31,998 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 33 [2021-05-02 13:51:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:31,998 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2021-05-02 13:51:31,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2021-05-02 13:51:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:51:31,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:31,999 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:32,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 13:51:32,214 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:32,215 INFO L82 PathProgramCache]: Analyzing trace with hash 471114083, now seen corresponding path program 1 times [2021-05-02 13:51:32,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:32,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373457070] [2021-05-02 13:51:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:32,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:32,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751628453] [2021-05-02 13:51:32,221 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 13:51:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:51:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:32,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:51:32,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:32,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373457070] [2021-05-02 13:51:32,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:32,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751628453] [2021-05-02 13:51:32,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751628453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:32,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:32,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:51:32,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643078079] [2021-05-02 13:51:32,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:51:32,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:32,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:51:32,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:51:32,495 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:34,368 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2021-05-02 13:51:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:51:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 13:51:34,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:34,370 INFO L225 Difference]: With dead ends: 103 [2021-05-02 13:51:34,370 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 13:51:34,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:51:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 13:51:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-05-02 13:51:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.3) internal successors, (78), 65 states have internal predecessors, (78), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 13:51:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2021-05-02 13:51:34,381 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 33 [2021-05-02 13:51:34,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:34,381 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2021-05-02 13:51:34,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2021-05-02 13:51:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:51:34,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:34,384 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:34,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:34,600 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:34,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1138782555, now seen corresponding path program 2 times [2021-05-02 13:51:34,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:34,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82784358] [2021-05-02 13:51:34,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:34,606 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:34,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414600642] [2021-05-02 13:51:34,606 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 13:51:34,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:51:34,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:51:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:34,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:34,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:34,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:34,895 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 13:51:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:35,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:49,725 WARN L205 SmtUtils]: Spent 14.51 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-02 13:51:59,797 WARN L205 SmtUtils]: Spent 8.39 s on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-05-02 13:51:59,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:00,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:52:01,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:01,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82784358] [2021-05-02 13:52:01,737 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:01,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414600642] [2021-05-02 13:52:01,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414600642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:01,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:01,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:52:01,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073036070] [2021-05-02 13:52:01,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:52:01,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:01,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:52:01,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:52:01,738 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:15,536 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2021-05-02 13:52:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:52:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 13:52:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:15,537 INFO L225 Difference]: With dead ends: 98 [2021-05-02 13:52:15,537 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:52:15,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 25038.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:52:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:52:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:52:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:52:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:52:15,538 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-05-02 13:52:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:15,538 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:52:15,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:52:15,539 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:52:15,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:52:15,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:52:16,092 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 18 [2021-05-02 13:52:16,222 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 17 [2021-05-02 13:52:16,226 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 13:52:16,226 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 13:52:16,226 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 13:52:16,226 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:52:16,226 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:52:16,226 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:52:16,226 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:52:16,226 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:52:16,227 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L194 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: (and (<= 1 main_~y~0) (<= main_~b~0 main_~y~0)) [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L33-1(lines 32 53) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L201 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 58) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L56(line 56) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 58) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L42(lines 42 52) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L38(lines 38 52) no Hoare annotation was computed. [2021-05-02 13:52:16,227 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 53) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0))) (or (and (<= 1 main_~p~0) (= main_~q~0 (* main_~x~0 main_~y~0)) .cse0 (= main_~a~0 0)) (and .cse0 (<= main_~b~0 main_~y~0)))) [2021-05-02 13:52:16,227 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 58) the Hoare annotation is: true [2021-05-02 13:52:16,227 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (= main_~q~0 (* main_~x~0 main_~y~0))) (.cse1 (<= 1 main_~y~0))) (or (and (<= 1 main_~p~0) .cse0 .cse1 (= main_~a~0 0)) (and .cse0 .cse1 (<= main_~b~0 main_~y~0)))) [2021-05-02 13:52:16,227 INFO L198 CegarLoopUtils]: For program point L45(lines 45 52) no Hoare annotation was computed. [2021-05-02 13:52:16,228 INFO L194 CegarLoopUtils]: At program point L45-2(lines 32 53) the Hoare annotation is: (and (<= 1 main_~y~0) (<= main_~b~0 main_~y~0)) [2021-05-02 13:52:16,228 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 13:52:16,228 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 13:52:16,228 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 13:52:16,228 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 13:52:16,228 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 13:52:16,228 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 13:52:16,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:52:16 BoogieIcfgContainer [2021-05-02 13:52:16,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:52:16,237 INFO L168 Benchmark]: Toolchain (without parser) took 64731.86 ms. Allocated memory was 194.0 MB in the beginning and 269.5 MB in the end (delta: 75.5 MB). Free memory was 158.6 MB in the beginning and 102.8 MB in the end (delta: 55.8 MB). Peak memory consumption was 131.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:16,237 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 194.0 MB. Free memory is still 175.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:52:16,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.76 ms. Allocated memory is still 194.0 MB. Free memory was 158.5 MB in the beginning and 175.7 MB in the end (delta: -17.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:16,238 INFO L168 Benchmark]: Boogie Preprocessor took 45.32 ms. Allocated memory is still 194.0 MB. Free memory was 175.7 MB in the beginning and 174.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:16,238 INFO L168 Benchmark]: RCFGBuilder took 317.63 ms. Allocated memory is still 194.0 MB. Free memory was 174.1 MB in the beginning and 157.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:16,238 INFO L168 Benchmark]: TraceAbstraction took 64157.52 ms. Allocated memory was 194.0 MB in the beginning and 269.5 MB in the end (delta: 75.5 MB). Free memory was 157.3 MB in the beginning and 102.8 MB in the end (delta: 54.5 MB). Peak memory consumption was 130.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:16,238 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 194.0 MB. Free memory is still 175.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 207.76 ms. Allocated memory is still 194.0 MB. Free memory was 158.5 MB in the beginning and 175.7 MB in the end (delta: -17.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.32 ms. Allocated memory is still 194.0 MB. Free memory was 175.7 MB in the beginning and 174.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 317.63 ms. Allocated memory is still 194.0 MB. Free memory was 174.1 MB in the beginning and 157.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 64157.52 ms. Allocated memory was 194.0 MB in the beginning and 269.5 MB in the end (delta: 75.5 MB). Free memory was 157.3 MB in the beginning and 102.8 MB in the end (delta: 54.5 MB). Peak memory consumption was 130.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 63593.9ms, OverallIterations: 11, TraceHistogramMax: 3, EmptinessCheckTime: 16.0ms, AutomataDifference: 31755.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 486.1ms, InitialAbstractionConstructionTime: 23.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 229 SDtfs, 320 SDslu, 1182 SDs, 0 SdLazy, 1922 SolverSat, 115 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 29945.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 308 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 26242.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=10, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 95.2ms AutomataMinimizationTime, 11 MinimizatonAttempts, 48 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 39 PreInvPairs, 73 NumberOfFragments, 102 HoareAnnotationTreeSize, 39 FomulaSimplifications, 10806 FormulaSimplificationTreeSizeReduction, 112.7ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 6532 FormulaSimplificationTreeSizeReductionInter, 365.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 71.6ms SsaConstructionTime, 241.0ms SatisfiabilityAnalysisTime, 28611.1ms InterpolantComputationTime, 292 NumberOfCodeBlocks, 292 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 281 ConstructedInterpolants, 0 QuantifiedInterpolants, 1963 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1315 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 40/67 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 <= y && b <= y RESULT: Ultimate proved your program to be correct! Received shutdown request...