/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:18:45,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:18:45,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:18:45,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:18:45,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:18:45,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:18:45,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:18:45,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:18:45,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:18:45,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:18:45,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:18:45,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:18:45,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:18:45,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:18:45,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:18:45,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:18:45,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:18:45,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:18:45,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:18:45,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:18:45,405 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 17:18:45,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:18:45,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:18:45,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:18:45,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:18:45,468 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:18:45,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:18:45,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:18:45,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:18:45,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:18:45,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:18:45,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:18:45,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:18:45,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:18:45,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:18:45,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:18:45,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:18:45,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:18:45,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:18:45,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:18:45,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:18:45,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:18:45,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:18:45,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:18:45,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:18:45,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:18:45,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:18:45,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:18:45,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:18:45,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:18:45,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:18:45,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:18:45,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:18:45,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:18:45,825 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:18:45,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-05-02 17:18:45,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac9a4daa/3d48f4ebac51477b81c61ba6f94a1291/FLAG0f022ddf8 [2021-05-02 17:18:46,374 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:18:46,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-05-02 17:18:46,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac9a4daa/3d48f4ebac51477b81c61ba6f94a1291/FLAG0f022ddf8 [2021-05-02 17:18:46,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac9a4daa/3d48f4ebac51477b81c61ba6f94a1291 [2021-05-02 17:18:46,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:18:46,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:18:46,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:18:46,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:18:46,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:18:46,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:46,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267a5191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46, skipping insertion in model container [2021-05-02 17:18:46,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:46,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:18:46,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:18:46,937 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c[458,471] [2021-05-02 17:18:46,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:18:46,960 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:18:46,978 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c[458,471] [2021-05-02 17:18:46,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:18:46,996 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:18:46,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46 WrapperNode [2021-05-02 17:18:46,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:18:47,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:18:47,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:18:47,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:18:47,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:47,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:47,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:47,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:47,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:47,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:47,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (1/1) ... [2021-05-02 17:18:47,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:18:47,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:18:47,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:18:47,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:18:47,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (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 17:18:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:18:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:18:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:18:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:18:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:18:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:18:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:18:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:18:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:18:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:18:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:18:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:18:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:18:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:18:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:18:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:18:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:18:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:18:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:18:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:18:47,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:18:47,463 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:18:47,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:18:47 BoogieIcfgContainer [2021-05-02 17:18:47,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:18:47,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:18:47,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:18:47,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:18:47,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:18:46" (1/3) ... [2021-05-02 17:18:47,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcb3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:18:47, skipping insertion in model container [2021-05-02 17:18:47,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:18:46" (2/3) ... [2021-05-02 17:18:47,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcb3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:18:47, skipping insertion in model container [2021-05-02 17:18:47,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:18:47" (3/3) ... [2021-05-02 17:18:47,471 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound2.c [2021-05-02 17:18:47,476 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:18:47,480 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:18:47,508 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:18:47,539 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:18:47,540 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:18:47,540 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:18:47,540 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:18:47,540 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:18:47,540 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:18:47,540 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:18:47,540 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:18:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:18:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:18:47,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:18:47,567 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:18:47,568 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:18:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:18:47,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-02 17:18:47,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:18:47,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449902075] [2021-05-02 17:18:47,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:18:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:18:47,877 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 17:18:47,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:18:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:18:47,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:18:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:18:47,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 17:18:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:18:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:18:47,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:18:47,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449902075] [2021-05-02 17:18:47,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449902075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:18:47,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:18:47,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:18:47,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166568746] [2021-05-02 17:18:47,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:18:47,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:18:47,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:18:47,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:18:47,962 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:18:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:18:50,199 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-02 17:18:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:18:50,201 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 17:18:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:18:50,206 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:18:50,206 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:18:50,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:18:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:18:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 17:18:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:18:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:18:50,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 17:18:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:18:50,269 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:18:50,269 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:18:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:18:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:18:50,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:18:50,271 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:18:50,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:18:50,272 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:18:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:18:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-02 17:18:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:18:50,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348185685] [2021-05-02 17:18:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:18:50,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:18:50,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125630069] [2021-05-02 17:18:50,288 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 17:18:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:18:50,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:18:50,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:18:50,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:18:50,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:18:50,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348185685] [2021-05-02 17:18:50,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:18:50,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125630069] [2021-05-02 17:18:50,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125630069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:18:50,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:18:50,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:18:50,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594135496] [2021-05-02 17:18:50,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:18:50,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:18:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:18:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:18:50,576 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:18:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:18:50,670 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 17:18:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:18:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 17:18:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:18:50,672 INFO L225 Difference]: With dead ends: 35 [2021-05-02 17:18:50,672 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 17:18:50,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:18:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 17:18:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 17:18:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:18:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 17:18:50,697 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 17:18:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:18:50,697 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 17:18:50,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:18:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 17:18:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:18:50,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:18:50,698 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:18:50,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:18:50,914 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:18:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:18:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-02 17:18:50,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:18:50,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071095387] [2021-05-02 17:18:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:18:50,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:18:50,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539973366] [2021-05-02 17:18:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:18:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:18:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:18:50,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:18:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:18:51,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:18:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071095387] [2021-05-02 17:18:51,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:18:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539973366] [2021-05-02 17:18:51,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539973366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:18:51,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:18:51,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:18:51,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135748507] [2021-05-02 17:18:51,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:18:51,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:18:51,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:18:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:18:51,173 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:18:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:18:53,334 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 17:18:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:18:53,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 17:18:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:18:53,336 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:18:53,336 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:18:53,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:18:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:18:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:18:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:18:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 17:18:53,347 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 17:18:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:18:53,347 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 17:18:53,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:18:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 17:18:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:18:53,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:18:53,349 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:18:53,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:18:53,565 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:18:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:18:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-02 17:18:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:18:53,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357522691] [2021-05-02 17:18:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:18:53,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:18:53,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114774047] [2021-05-02 17:18:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:18:53,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:18:53,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:18:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:18:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:18:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:18:53,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:18:53,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357522691] [2021-05-02 17:18:53,975 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:18:53,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114774047] [2021-05-02 17:18:53,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114774047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:18:53,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:18:53,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 17:18:53,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147042319] [2021-05-02 17:18:53,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:18:53,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:18:53,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:18:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:18:53,977 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:18:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:18:58,368 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-02 17:18:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:18:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 17:18:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:18:58,369 INFO L225 Difference]: With dead ends: 55 [2021-05-02 17:18:58,370 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 17:18:58,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:18:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 17:18:58,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 17:18:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:18:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 17:18:58,382 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 36 [2021-05-02 17:18:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:18:58,382 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 17:18:58,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:18:58,383 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 17:18:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:18:58,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:18:58,384 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:18:58,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:18:58,589 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:18:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:18:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-02 17:18:58,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:18:58,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886308646] [2021-05-02 17:18:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:18:58,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:18:58,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688720734] [2021-05-02 17:18:58,601 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 17:18:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:18:58,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:18:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:18:58,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:18:58,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:18:58,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886308646] [2021-05-02 17:18:58,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:18:58,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688720734] [2021-05-02 17:18:58,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688720734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:18:58,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:18:58,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:18:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512270080] [2021-05-02 17:18:58,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:18:58,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:18:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:18:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:18:58,926 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:18:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:18:59,097 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-05-02 17:18:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:18:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 17:18:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:18:59,101 INFO L225 Difference]: With dead ends: 60 [2021-05-02 17:18:59,102 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:18:59,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:18:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:18:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:18:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:18:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 17:18:59,130 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 17:18:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:18:59,132 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 17:18:59,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:18:59,133 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 17:18:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 17:18:59,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:18:59,137 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:18:59,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:18:59,353 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:18:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:18:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-02 17:18:59,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:18:59,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132865114] [2021-05-02 17:18:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:18:59,363 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:18:59,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970351982] [2021-05-02 17:18:59,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:18:59,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 17:18:59,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:18:59,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:18:59,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:18:59,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:59,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:18:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 17:18:59,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:18:59,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132865114] [2021-05-02 17:18:59,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:18:59,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970351982] [2021-05-02 17:18:59,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970351982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:18:59,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:18:59,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:18:59,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029409163] [2021-05-02 17:18:59,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:18:59,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:18:59,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:18:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:18:59,569 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 17:18:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:18:59,699 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 17:18:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:18:59,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 17:18:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:18:59,701 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:18:59,701 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:18:59,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:18:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:18:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 17:18:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:18:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 17:18:59,711 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 17:18:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:18:59,711 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 17:18:59,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 17:18:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 17:18:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:18:59,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:18:59,712 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:18:59,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:18:59,937 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:18:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:18:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2021-05-02 17:18:59,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:18:59,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458812164] [2021-05-02 17:18:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:18:59,961 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:18:59,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046410492] [2021-05-02 17:18:59,961 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 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 17:19:00,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:19:00,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:00,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:19:00,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:00,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:19:00,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458812164] [2021-05-02 17:19:00,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:00,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046410492] [2021-05-02 17:19:00,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046410492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:00,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:00,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:19:00,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615212878] [2021-05-02 17:19:00,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:19:00,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:00,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:19:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:19:00,415 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 17:19:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:02,588 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-05-02 17:19:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:19:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-02 17:19:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:02,590 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:19:02,590 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 17:19:02,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:19:02,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 17:19:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 17:19:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:19:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 17:19:02,599 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 17:19:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:02,599 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 17:19:02,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 17:19:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 17:19:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 17:19:02,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:02,600 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:02,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:02,803 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:02,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2021-05-02 17:19:02,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:02,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797606497] [2021-05-02 17:19:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:02,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:02,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022221604] [2021-05-02 17:19:02,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:19:02,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:19:02,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:02,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:19:02,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:02,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 17:19:03,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:03,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797606497] [2021-05-02 17:19:03,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:03,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022221604] [2021-05-02 17:19:03,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022221604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:03,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:03,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:19:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960499807] [2021-05-02 17:19:03,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:19:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:19:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:19:03,039 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 17:19:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:03,105 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-05-02 17:19:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:19:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-02 17:19:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:03,106 INFO L225 Difference]: With dead ends: 49 [2021-05-02 17:19:03,106 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:19:03,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:19:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:19:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:19:03,107 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 17:19:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:19:03,107 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-02 17:19:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:03,107 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:19:03,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 17:19:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:19:03,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:19:03,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:19:03,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:19:03,634 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-02 17:19:05,822 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-05-02 17:19:05,950 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-05-02 17:19:06,372 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-05-02 17:19:06,377 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 17:19:06,377 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 17:19:06,377 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 17:19:06,377 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:19:06,378 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 17:19:06,378 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:19:06,378 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:19:06,378 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 17:19:06,378 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:19:06,378 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:19:06,378 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-02 17:19:06,378 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 17:19:06,378 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 17:19:06,378 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 17:19:06,378 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 42) the Hoare annotation is: true [2021-05-02 17:19:06,379 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (.cse1 (<= main_~k~0 2))) (or (and (<= 1 main_~c~0) (= main_~y~0 1) (= main_~x~0 .cse0) (<= main_~c~0 1) (< 0 main_~k~0) .cse1) (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (<= 2 main_~c~0) (= main_~y~0 2) (< 1 main_~k~0) .cse1) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1))) [2021-05-02 17:19:06,379 INFO L198 CegarLoopUtils]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2021-05-02 17:19:06,379 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (.cse1 (<= main_~k~0 2))) (or (and (<= 1 main_~c~0) (= main_~y~0 1) (= main_~x~0 .cse0) (<= main_~c~0 1) (< 0 main_~k~0) .cse1) (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (<= 2 main_~c~0) (= main_~y~0 2) (< 1 main_~k~0) .cse1) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1))) [2021-05-02 17:19:06,379 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (or (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2)) (and (<= main_~k~0 1) (= main_~y~0 1) (= main_~x~0 .cse0) (<= main_~c~0 1) (< 0 main_~k~0)) (and (= main_~y~0 0) (= main_~x~0 0)))) [2021-05-02 17:19:06,379 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2021-05-02 17:19:06,379 INFO L198 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-05-02 17:19:06,379 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-02 17:19:06,379 INFO L194 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 0 main_~k~0) (<= main_~k~0 2)) [2021-05-02 17:19:06,380 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 42) no Hoare annotation was computed. [2021-05-02 17:19:06,380 INFO L198 CegarLoopUtils]: For program point L40(line 40) no Hoare annotation was computed. [2021-05-02 17:19:06,380 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (or (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2)) (and (<= main_~k~0 1) (= main_~y~0 1) (< 0 main_~k~0) (<= main_~c~0 1)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 17:19:06,380 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 17:19:06,380 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 17:19:06,380 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 17:19:06,380 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 17:19:06,380 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 17:19:06,380 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 17:19:06,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:19:06 BoogieIcfgContainer [2021-05-02 17:19:06,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:19:06,395 INFO L168 Benchmark]: Toolchain (without parser) took 19610.03 ms. Allocated memory was 190.8 MB in the beginning and 237.0 MB in the end (delta: 46.1 MB). Free memory was 155.1 MB in the beginning and 149.8 MB in the end (delta: 5.3 MB). Peak memory consumption was 118.9 MB. Max. memory is 8.0 GB. [2021-05-02 17:19:06,395 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 190.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:19:06,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.89 ms. Allocated memory is still 190.8 MB. Free memory was 154.9 MB in the beginning and 173.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-05-02 17:19:06,395 INFO L168 Benchmark]: Boogie Preprocessor took 48.59 ms. Allocated memory is still 190.8 MB. Free memory was 173.9 MB in the beginning and 172.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:19:06,395 INFO L168 Benchmark]: RCFGBuilder took 404.86 ms. Allocated memory is still 190.8 MB. Free memory was 172.4 MB in the beginning and 157.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:19:06,395 INFO L168 Benchmark]: TraceAbstraction took 18928.27 ms. Allocated memory was 190.8 MB in the beginning and 237.0 MB in the end (delta: 46.1 MB). Free memory was 157.2 MB in the beginning and 149.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 121.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:19:06,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 190.8 MB. Free memory is still 171.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 219.89 ms. Allocated memory is still 190.8 MB. Free memory was 154.9 MB in the beginning and 173.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.59 ms. Allocated memory is still 190.8 MB. Free memory was 173.9 MB in the beginning and 172.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 404.86 ms. Allocated memory is still 190.8 MB. Free memory was 172.4 MB in the beginning and 157.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18928.27 ms. Allocated memory was 190.8 MB in the beginning and 237.0 MB in the end (delta: 46.1 MB). Free memory was 157.2 MB in the beginning and 149.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 121.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15795.7ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 19.5ms, AutomataDifference: 11483.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 3043.7ms, InitialAbstractionConstructionTime: 15.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 200 SDtfs, 91 SDslu, 854 SDs, 0 SdLazy, 555 SolverSat, 41 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 10831.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 289 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 723.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=4, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 115.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 28 PreInvPairs, 41 NumberOfFragments, 354 HoareAnnotationTreeSize, 28 FomulaSimplifications, 499 FormulaSimplificationTreeSizeReduction, 128.0ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 678 FormulaSimplificationTreeSizeReductionInter, 2903.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 86.7ms SsaConstructionTime, 442.6ms SatisfiabilityAnalysisTime, 1730.5ms InterpolantComputationTime, 293 NumberOfCodeBlocks, 279 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 985 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1004 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 8 InterpolantComputations, 1 PerfectInterpolantSequences, 173/214 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: 28]: Loop Invariant Derived loop invariant: ((((((1 <= c && y == 1) && x == y * y * y * y * y) && c <= 1) && 0 < k) && k <= 2) || ((((x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2 && 2 <= c) && y == 2) && 1 < k) && k <= 2)) || ((((c == 0 && 0 <= k) && y == 0) && x == 0) && k <= 2) RESULT: Ultimate proved your program to be correct! Received shutdown request...