/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/sqrt1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:23:43,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:23:43,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:23:44,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:23:44,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:23:44,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:23:44,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:23:44,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:23:44,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:23:44,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:23:44,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:23:44,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:23:44,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:23:44,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:23:44,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:23:44,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:23:44,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:23:44,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:23:44,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:23:44,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:23:44,055 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 17:23:44,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:23:44,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:23:44,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:23:44,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:23:44,087 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:23:44,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:23:44,087 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:23:44,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:23:44,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:23:44,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:23:44,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:23:44,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:23:44,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:23:44,088 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:23:44,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:23:44,089 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:23:44,089 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:23:44,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:23:44,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:23:44,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:23:44,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:23:44,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:23:44,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:23:44,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:23:44,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:23:44,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:23:44,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:23:44,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:23:44,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:23:44,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:23:44,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:23:44,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:23:44,399 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:23:44,400 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:23:44,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-02 17:23:44,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbcfc1742/7e31fda60ad447b4baa220c8d753bcb3/FLAG4f4bbffe2 [2021-05-02 17:23:44,771 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:23:44,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-02 17:23:44,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbcfc1742/7e31fda60ad447b4baa220c8d753bcb3/FLAG4f4bbffe2 [2021-05-02 17:23:45,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbcfc1742/7e31fda60ad447b4baa220c8d753bcb3 [2021-05-02 17:23:45,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:23:45,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:23:45,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:23:45,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:23:45,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:23:45,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58579a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45, skipping insertion in model container [2021-05-02 17:23:45,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:23:45,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:23:45,302 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/sqrt1-ll_valuebound10.c[520,533] [2021-05-02 17:23:45,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:23:45,322 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:23:45,339 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/sqrt1-ll_valuebound10.c[520,533] [2021-05-02 17:23:45,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:23:45,365 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:23:45,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45 WrapperNode [2021-05-02 17:23:45,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:23:45,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:23:45,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:23:45,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:23:45,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (1/1) ... [2021-05-02 17:23:45,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:23:45,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:23:45,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:23:45,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:23:45,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (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 17:23:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:23:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:23:45,514 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:23:45,514 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:23:45,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:23:45,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:23:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:23:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:23:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:23:45,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:23:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:23:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:23:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:23:45,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:23:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:23:45,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:23:45,739 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:23:45,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:23:45 BoogieIcfgContainer [2021-05-02 17:23:45,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:23:45,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:23:45,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:23:45,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:23:45,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:23:45" (1/3) ... [2021-05-02 17:23:45,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d644e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:23:45, skipping insertion in model container [2021-05-02 17:23:45,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:45" (2/3) ... [2021-05-02 17:23:45,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d644e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:23:45, skipping insertion in model container [2021-05-02 17:23:45,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:23:45" (3/3) ... [2021-05-02 17:23:45,753 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.c [2021-05-02 17:23:45,758 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:23:45,762 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:23:45,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:23:45,788 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:23:45,788 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:23:45,789 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:23:45,789 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:23:45,789 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:23:45,789 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:23:45,789 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:23:45,789 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:23:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:23:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:23:45,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:45,804 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:45,804 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-02 17:23:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:45,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411337571] [2021-05-02 17:23:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:45,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:23:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:23:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:45,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411337571] [2021-05-02 17:23:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411337571] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:23:45,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:23:45,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:23:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797490363] [2021-05-02 17:23:45,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:23:45,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:23:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:23:45,967 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:46,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:46,089 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-02 17:23:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:23:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:23:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:46,095 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:23:46,096 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:23:46,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:23:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:23:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:23:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:23:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 17:23:46,133 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 17:23:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:46,134 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 17:23:46,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 17:23:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:23:46,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:46,135 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:46,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:23:46,136 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:46,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-02 17:23:46,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:46,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820462724] [2021-05-02 17:23:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:46,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:23:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:46,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:23:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:46,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:46,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820462724] [2021-05-02 17:23:46,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820462724] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:23:46,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:23:46,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:23:46,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830497042] [2021-05-02 17:23:46,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:23:46,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:46,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:23:46,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:46,276 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:46,517 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 17:23:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:46,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:23:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:46,519 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:23:46,519 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:23:46,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:23:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 17:23:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:23:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 17:23:46,529 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 17:23:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:46,530 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 17:23:46,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 17:23:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:23:46,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:46,530 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:46,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:23:46,531 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:46,531 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2021-05-02 17:23:46,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:46,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463408622] [2021-05-02 17:23:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:46,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:46,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035060857] [2021-05-02 17:23:46,542 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 17:23:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:23:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:46,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:46,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463408622] [2021-05-02 17:23:46,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:46,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035060857] [2021-05-02 17:23:46,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035060857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:46,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:46,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:46,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626190227] [2021-05-02 17:23:46,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:46,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:46,764 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 17:23:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:46,898 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 17:23:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 17:23:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:46,899 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:23:46,900 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 17:23:46,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 17:23:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 17:23:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:23:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 17:23:46,916 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 17:23:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:46,916 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 17:23:46,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 17:23:46,917 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 17:23:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:23:46,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:46,918 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:47,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:23:47,139 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2021-05-02 17:23:47,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:47,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334691208] [2021-05-02 17:23:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:47,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:47,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480563276] [2021-05-02 17:23:47,153 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 17:23:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:47,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:23:47,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:23:47,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:47,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334691208] [2021-05-02 17:23:47,275 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:47,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480563276] [2021-05-02 17:23:47,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480563276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:47,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:47,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 17:23:47,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444715161] [2021-05-02 17:23:47,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:23:47,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:47,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:23:47,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:47,277 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 17:23:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:47,333 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-05-02 17:23:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:23:47,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 17:23:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:47,334 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:23:47,334 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 17:23:47,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:23:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 17:23:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 17:23:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 17:23:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 17:23:47,342 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 17:23:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:47,342 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 17:23:47,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 17:23:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 17:23:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:23:47,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:47,343 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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 17:23:47,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:47,568 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:47,568 INFO L82 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2021-05-02 17:23:47,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:47,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798533712] [2021-05-02 17:23:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:47,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:47,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618745956] [2021-05-02 17:23:47,590 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 17:23:47,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:23:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:23:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:23:47,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:47,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798533712] [2021-05-02 17:23:47,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:47,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618745956] [2021-05-02 17:23:47,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618745956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:47,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:47,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:47,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123792898] [2021-05-02 17:23:47,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:47,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:47,781 INFO L87 Difference]: Start difference. First operand 49 states and 59 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:23:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:47,899 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 17:23:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:23:47,900 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 17:23:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:47,900 INFO L225 Difference]: With dead ends: 57 [2021-05-02 17:23:47,901 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 17:23:47,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 17:23:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 17:23:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 17:23:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 17:23:47,907 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 17:23:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:47,908 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 17:23:47,908 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:23:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 17:23:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:23:47,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:47,909 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:48,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:48,131 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:48,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2021-05-02 17:23:48,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:48,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088923124] [2021-05-02 17:23:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:48,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:48,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189821712] [2021-05-02 17:23:48,150 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 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 17:23:48,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 17:23:48,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:48,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:23:48,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:48,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:23:48,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:48,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088923124] [2021-05-02 17:23:48,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:48,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189821712] [2021-05-02 17:23:48,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189821712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:48,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:48,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824398230] [2021-05-02 17:23:48,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:48,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:48,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:48,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:48,348 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:23:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:48,451 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-02 17:23:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:23:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 17:23:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:48,454 INFO L225 Difference]: With dead ends: 61 [2021-05-02 17:23:48,454 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:23:48,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:23:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 17:23:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 17:23:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 17:23:48,472 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 17:23:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:48,473 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 17:23:48,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:23:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 17:23:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:23:48,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:48,474 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:48,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:48,674 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:48,675 INFO L82 PathProgramCache]: Analyzing trace with hash -463567166, now seen corresponding path program 4 times [2021-05-02 17:23:48,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:48,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237931503] [2021-05-02 17:23:48,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:48,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:48,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624494028] [2021-05-02 17:23:48,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:23:48,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:23:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:48,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:23:48,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 17:23:48,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:48,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237931503] [2021-05-02 17:23:48,809 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:48,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624494028] [2021-05-02 17:23:48,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624494028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:48,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:48,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:23:48,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820855076] [2021-05-02 17:23:48,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:23:48,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:48,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:23:48,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:23:48,811 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:23:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:48,875 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-05-02 17:23:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:48,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 17:23:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:48,877 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:23:48,877 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 17:23:48,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 17:23:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 17:23:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 17:23:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 17:23:48,883 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2021-05-02 17:23:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:48,884 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 17:23:48,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:23:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 17:23:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 17:23:48,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:48,885 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:49,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:23:49,101 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 790038090, now seen corresponding path program 5 times [2021-05-02 17:23:49,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:49,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434397859] [2021-05-02 17:23:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:49,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:49,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403943675] [2021-05-02 17:23:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:23:49,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 17:23:49,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:49,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:23:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 17:23:49,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:49,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434397859] [2021-05-02 17:23:49,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:49,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403943675] [2021-05-02 17:23:49,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403943675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:49,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:49,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:23:49,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402636068] [2021-05-02 17:23:49,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:23:49,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:49,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:23:49,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:23:49,291 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 17:23:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:49,416 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-02 17:23:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:23:49,417 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 17:23:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:49,418 INFO L225 Difference]: With dead ends: 74 [2021-05-02 17:23:49,418 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:23:49,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:23:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:23:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 17:23:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:23:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 17:23:49,435 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2021-05-02 17:23:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:49,435 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 17:23:49,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 17:23:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 17:23:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:23:49,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:49,436 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:49,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:49,652 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1996886914, now seen corresponding path program 6 times [2021-05-02 17:23:49,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:49,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94323669] [2021-05-02 17:23:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:49,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:49,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571799456] [2021-05-02 17:23:49,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:23:49,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 17:23:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:23:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:49,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 17:23:49,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:49,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94323669] [2021-05-02 17:23:49,910 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:49,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571799456] [2021-05-02 17:23:49,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571799456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:49,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:49,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:23:49,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505222830] [2021-05-02 17:23:49,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:23:49,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:23:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:23:49,911 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:23:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:50,076 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-02 17:23:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:23:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 17:23:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:50,077 INFO L225 Difference]: With dead ends: 78 [2021-05-02 17:23:50,077 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 17:23:50,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:23:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 17:23:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 17:23:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 17:23:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 17:23:50,089 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2021-05-02 17:23:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:50,090 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 17:23:50,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 17:23:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 17:23:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:23:50,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:50,093 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:50,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:50,299 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -415362136, now seen corresponding path program 7 times [2021-05-02 17:23:50,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:50,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601391439] [2021-05-02 17:23:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:50,305 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:50,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258600558] [2021-05-02 17:23:50,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:23:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 17:23:50,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601391439] [2021-05-02 17:23:50,594 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258600558] [2021-05-02 17:23:50,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258600558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:50,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:50,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:50,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713689929] [2021-05-02 17:23:50,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:50,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:50,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:50,596 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 17:23:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:50,738 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-05-02 17:23:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:23:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-02 17:23:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:50,743 INFO L225 Difference]: With dead ends: 87 [2021-05-02 17:23:50,743 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 17:23:50,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:23:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 17:23:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 17:23:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0625) internal successors, (51), 50 states have internal predecessors, (51), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 17:23:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-02 17:23:50,759 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 68 [2021-05-02 17:23:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:50,760 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-02 17:23:50,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 17:23:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-02 17:23:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 17:23:50,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:50,762 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:50,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:23:50,977 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1903584988, now seen corresponding path program 8 times [2021-05-02 17:23:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:50,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832211438] [2021-05-02 17:23:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:50,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:50,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924622317] [2021-05-02 17:23:50,983 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:51,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:23:51,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:51,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:23:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 17:23:51,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:51,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832211438] [2021-05-02 17:23:51,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:51,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924622317] [2021-05-02 17:23:51,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924622317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:51,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:51,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:23:51,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866514037] [2021-05-02 17:23:51,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:23:51,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:23:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:51,249 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 17:23:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:51,412 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-05-02 17:23:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:23:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2021-05-02 17:23:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:51,414 INFO L225 Difference]: With dead ends: 91 [2021-05-02 17:23:51,414 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 17:23:51,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:23:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 17:23:51,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-02 17:23:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 17:23:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-05-02 17:23:51,421 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 73 [2021-05-02 17:23:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:51,421 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-05-02 17:23:51,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 17:23:51,421 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-05-02 17:23:51,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 17:23:51,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:51,422 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:51,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:51,637 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2040579864, now seen corresponding path program 9 times [2021-05-02 17:23:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64075137] [2021-05-02 17:23:51,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:51,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:51,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569593598] [2021-05-02 17:23:51,644 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:51,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 17:23:51,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:51,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:23:51,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:51,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:51,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:51,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:51,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:24:07,944 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 17:24:07,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:24:07,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:24:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-02 17:24:07,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:24:07,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64075137] [2021-05-02 17:24:07,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:24:07,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569593598] [2021-05-02 17:24:07,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569593598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:24:07,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:24:07,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:24:07,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029455560] [2021-05-02 17:24:07,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:24:07,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:24:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:24:07,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2021-05-02 17:24:07,998 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:24:19,824 WARN L205 SmtUtils]: Spent 11.81 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 17:25:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:13,495 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2021-05-02 17:25:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:25:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-02 17:25:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:13,496 INFO L225 Difference]: With dead ends: 102 [2021-05-02 17:25:13,496 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 17:25:13,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 27925.9ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 17:25:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 17:25:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 17:25:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 17:25:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-05-02 17:25:13,508 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 78 [2021-05-02 17:25:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:13,508 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-05-02 17:25:13,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:25:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-05-02 17:25:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 17:25:13,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:25:13,525 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:25:13,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:13,746 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:25:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:25:13,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2131153022, now seen corresponding path program 10 times [2021-05-02 17:25:13,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:25:13,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725575106] [2021-05-02 17:25:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:25:13,752 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:25:13,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432256376] [2021-05-02 17:25:13,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:25:13,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:25:13,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:25:13,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:25:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:25:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:25:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 47 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 17:25:14,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:25:14,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725575106] [2021-05-02 17:25:14,194 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:25:14,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432256376] [2021-05-02 17:25:14,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432256376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:25:14,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:25:14,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:25:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008126852] [2021-05-02 17:25:14,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:25:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:25:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:25:14,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:25:14,196 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 17:25:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:25:14,265 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-05-02 17:25:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:25:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 17:25:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:25:14,265 INFO L225 Difference]: With dead ends: 97 [2021-05-02 17:25:14,265 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:25:14,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:25:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:25:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:25:14,269 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 17:25:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:25:14,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-05-02 17:25:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:25:14,269 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:25:14,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 17:25:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:25:14,269 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:25:14,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 17:25:14,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:25:14,730 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2021-05-02 17:25:24,466 WARN L205 SmtUtils]: Spent 9.72 s on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2021-05-02 17:25:24,572 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-05-02 17:25:24,740 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2021-05-02 17:25:24,906 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-05-02 17:25:25,078 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2021-05-02 17:25:27,317 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2021-05-02 17:25:27,322 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 17:25:27,323 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 17:25:27,323 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 17:25:27,323 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:25:27,323 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 17:25:27,323 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:25:27,323 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:25:27,323 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 17:25:27,324 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:25:27,324 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:25:27,324 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 17:25:27,324 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 17:25:27,324 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:25:27,324 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:25:27,324 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:25:27,324 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 10))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) .cse1 (= main_~s~0 4)) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 3) (= 7 main_~t~0) (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1))) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)))) [2021-05-02 17:25:27,324 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 10)) (.cse2 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~s~0 4) .cse2) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 0) .cse2 (= main_~s~0 1)) (and .cse0 (= main_~s~0 16) .cse1 (= 7 main_~t~0) .cse2))) [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:25:27,325 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= main_~a~0 3) (= main_~s~0 (let ((.cse0 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse0 2) (* .cse0 .cse0) 1))) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4))) [2021-05-02 17:25:27,325 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 10)) (.cse2 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) .cse1 (= main_~s~0 4) .cse2) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 0) .cse2 (= main_~s~0 1)) (and .cse0 .cse1 (= 7 main_~t~0) .cse2 (= main_~s~0 (let ((.cse3 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse3 2) (* .cse3 .cse3) 1)))))) [2021-05-02 17:25:27,325 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2021-05-02 17:25:27,325 INFO L194 CegarLoopUtils]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 10))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) .cse1 (= main_~s~0 4)) (and .cse0 .cse1 (= main_~s~0 (+ main_~t~0 4)) (= main_~a~0 2) (= main_~s~0 9)) (and .cse0 .cse1 (= main_~a~0 3) (= 7 main_~t~0) (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1))) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)))) [2021-05-02 17:25:27,325 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~a~0 2) 1) main_~t~0))) (or (and (= 7 main_~t~0) .cse0 (= main_~s~0 (let ((.cse1 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse1 2) (* .cse1 .cse1) 1)))) (and (= 5 main_~t~0) (= main_~a~0 2) (= main_~s~0 9)) (and (= main_~a~0 0) .cse0 (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4)))) [2021-05-02 17:25:27,325 INFO L201 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-05-02 17:25:27,325 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= main_~s~0 (let ((.cse0 (div (+ main_~t~0 (- 1)) 2))) (+ (* .cse0 2) (* .cse0 .cse0) 1))) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-02 17:25:27,325 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:25:27,325 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:25:27,326 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 17:25:27,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:25:27 BoogieIcfgContainer [2021-05-02 17:25:27,341 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:25:27,341 INFO L168 Benchmark]: Toolchain (without parser) took 102150.80 ms. Allocated memory was 198.2 MB in the beginning and 316.7 MB in the end (delta: 118.5 MB). Free memory was 163.0 MB in the beginning and 263.5 MB in the end (delta: -100.5 MB). Peak memory consumption was 168.2 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:27,341 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:25:27,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.89 ms. Allocated memory is still 198.2 MB. Free memory was 162.8 MB in the beginning and 153.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:27,342 INFO L168 Benchmark]: Boogie Preprocessor took 70.87 ms. Allocated memory is still 198.2 MB. Free memory was 153.2 MB in the beginning and 181.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:27,342 INFO L168 Benchmark]: RCFGBuilder took 302.03 ms. Allocated memory is still 198.2 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:27,342 INFO L168 Benchmark]: TraceAbstraction took 101600.00 ms. Allocated memory was 198.2 MB in the beginning and 316.7 MB in the end (delta: 118.5 MB). Free memory was 166.4 MB in the beginning and 263.5 MB in the end (delta: -97.1 MB). Peak memory consumption was 171.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:25:27,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 179.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 172.89 ms. Allocated memory is still 198.2 MB. Free memory was 162.8 MB in the beginning and 153.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.87 ms. Allocated memory is still 198.2 MB. Free memory was 153.2 MB in the beginning and 181.5 MB in the end (delta: -28.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 302.03 ms. Allocated memory is still 198.2 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 101600.00 ms. Allocated memory was 198.2 MB in the beginning and 316.7 MB in the end (delta: 118.5 MB). Free memory was 166.4 MB in the beginning and 263.5 MB in the end (delta: -97.1 MB). Peak memory consumption was 171.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 88699.2ms, OverallIterations: 13, TraceHistogramMax: 13, EmptinessCheckTime: 34.1ms, AutomataDifference: 67061.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 12833.9ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 410 SDtfs, 151 SDslu, 1667 SDs, 0 SdLazy, 1368 SolverSat, 148 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 54391.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 641 GetRequests, 536 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 28620.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=12, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 148.4ms AutomataMinimizationTime, 13 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 48 PreInvPairs, 76 NumberOfFragments, 570 HoareAnnotationTreeSize, 48 FomulaSimplifications, 7904 FormulaSimplificationTreeSizeReduction, 116.1ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 1690 FormulaSimplificationTreeSizeReductionInter, 12706.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 122.3ms SsaConstructionTime, 401.5ms SatisfiabilityAnalysisTime, 18046.5ms InterpolantComputationTime, 645 NumberOfCodeBlocks, 594 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 632 ConstructedInterpolants, 0 QuantifiedInterpolants, 2060 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1827 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 1260/1444 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: 30]: Loop Invariant Derived loop invariant: ((((((0 <= n && s == t + 1) && a == 1) && n <= 10) && s == 4) || ((((0 <= n && n <= 10) && s == t + 4) && a == 2) && s == 9)) || ((((0 <= n && n <= 10) && a == 3) && 7 == t) && s * 4 == t * t + t * 2 + 1)) || ((((0 <= n && n <= 10) && a == 0) && a * 2 + 1 == t) && s == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...