/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:01:05,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:01:05,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:01:05,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:01:05,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:01:05,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:01:05,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:01:05,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:01:05,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:01:05,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:01:05,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:01:05,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:01:05,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:01:05,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:01:05,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:01:05,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:01:05,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:01:05,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:01:05,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:01:05,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:01:05,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:01:05,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:01:05,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:01:05,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:01:05,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:01:05,150 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:01:05,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:01:05,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:01:05,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:01:05,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:01:05,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:01:05,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:01:05,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:01:05,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:01:05,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:01:05,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:01:05,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:01:05,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:01:05,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:01:05,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:01:05,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:01:05,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:01:05,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:01:05,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:01:05,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:01:05,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:01:05,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:01:05,440 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:01:05,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-02 15:01:05,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef0776c2d/2cf7ab91eaf1496e87c7a9179b862599/FLAGc7134538b [2021-05-02 15:01:05,858 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:01:05,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-02 15:01:05,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef0776c2d/2cf7ab91eaf1496e87c7a9179b862599/FLAGc7134538b [2021-05-02 15:01:05,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef0776c2d/2cf7ab91eaf1496e87c7a9179b862599 [2021-05-02 15:01:05,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:01:05,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:01:05,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:05,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:01:05,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:01:05,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:05" (1/1) ... [2021-05-02 15:01:05,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db2476a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:05, skipping insertion in model container [2021-05-02 15:01:05,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:05" (1/1) ... [2021-05-02 15:01:05,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:01:05,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:01:06,025 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2021-05-02 15:01:06,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:06,056 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:01:06,076 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2021-05-02 15:01:06,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:06,135 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:01:06,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06 WrapperNode [2021-05-02 15:01:06,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:06,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:01:06,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:01:06,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:01:06,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... [2021-05-02 15:01:06,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... [2021-05-02 15:01:06,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... [2021-05-02 15:01:06,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... [2021-05-02 15:01:06,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... [2021-05-02 15:01:06,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... [2021-05-02 15:01:06,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... [2021-05-02 15:01:06,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:01:06,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:01:06,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:01:06,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:01:06,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:01:06,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:01:06,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:01:06,229 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:01:06,229 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:01:06,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:01:06,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:01:06,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:01:06,230 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:01:06,230 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:01:06,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:01:06,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:01:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:01:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:01:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:01:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:01:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:01:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:01:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:01:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:01:06,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:01:06,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:01:06,461 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:01:06,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:06 BoogieIcfgContainer [2021-05-02 15:01:06,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:01:06,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:01:06,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:01:06,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:01:06,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:01:05" (1/3) ... [2021-05-02 15:01:06,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77681e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:06, skipping insertion in model container [2021-05-02 15:01:06,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:06" (2/3) ... [2021-05-02 15:01:06,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77681e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:06, skipping insertion in model container [2021-05-02 15:01:06,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:06" (3/3) ... [2021-05-02 15:01:06,467 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2021-05-02 15:01:06,475 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:01:06,478 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:01:06,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:01:06,517 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:01:06,517 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:01:06,517 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:01:06,517 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:01:06,517 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:01:06,517 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:01:06,517 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:01:06,517 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:01:06,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:01:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:01:06,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:06,534 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:06,534 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-02 15:01:06,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:06,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435763263] [2021-05-02 15:01:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:06,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:01:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:06,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:01:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:06,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:01:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:01:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:06,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:01:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:01:06,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:06,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435763263] [2021-05-02 15:01:06,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435763263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:06,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:06,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:01:06,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734886892] [2021-05-02 15:01:06,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:01:06,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:01:06,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:01:06,735 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:06,884 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-02 15:01:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:01:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:01:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:06,890 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:01:06,890 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:01:06,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:01:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:01:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:01:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:01:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 15:01:06,935 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 15:01:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:06,935 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 15:01:06,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 15:01:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:01:06,937 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:06,937 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:06,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:01:06,937 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-02 15:01:06,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:06,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521880500] [2021-05-02 15:01:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:06,964 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:06,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5474040] [2021-05-02 15:01:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:01:07,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:07,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:01:07,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521880500] [2021-05-02 15:01:07,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:07,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5474040] [2021-05-02 15:01:07,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5474040] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:07,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:07,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:01:07,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753401118] [2021-05-02 15:01:07,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:01:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:07,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:01:07,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:01:07,193 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:07,296 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 15:01:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:01:07,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 15:01:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:07,298 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:01:07,298 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 15:01:07,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 15:01:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 15:01:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:01:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:01:07,305 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 15:01:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:07,306 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:01:07,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:01:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:01:07,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:07,306 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:07,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:01:07,521 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:07,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-02 15:01:07,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:07,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552091386] [2021-05-02 15:01:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:07,533 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:07,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185123742] [2021-05-02 15:01:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:07,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:01:07,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:07,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:01:07,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:07,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552091386] [2021-05-02 15:01:07,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:07,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185123742] [2021-05-02 15:01:07,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185123742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:07,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:07,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:01:07,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280567760] [2021-05-02 15:01:07,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:01:07,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:07,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:01:07,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:01:07,760 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:07,847 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-02 15:01:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:01:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 15:01:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:07,850 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:01:07,850 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:01:07,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:01:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:01:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:01:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:01:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 15:01:07,867 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 15:01:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:07,868 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 15:01:07,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 15:01:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:01:07,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:07,870 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:08,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:08,070 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-02 15:01:08,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:08,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934163297] [2021-05-02 15:01:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:08,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:08,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590270754] [2021-05-02 15:01:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:01:08,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:08,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:01:08,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:08,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934163297] [2021-05-02 15:01:08,271 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:08,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590270754] [2021-05-02 15:01:08,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590270754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:08,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:08,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:01:08,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534023343] [2021-05-02 15:01:08,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:01:08,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:08,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:01:08,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:08,272 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:08,479 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-02 15:01:08,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:01:08,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 15:01:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:08,480 INFO L225 Difference]: With dead ends: 103 [2021-05-02 15:01:08,480 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 15:01:08,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:01:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 15:01:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 15:01:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:01:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 15:01:08,491 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 15:01:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:08,491 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 15:01:08,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 15:01:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:01:08,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:08,492 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:08,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:08,708 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:08,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-02 15:01:08,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:08,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913228428] [2021-05-02 15:01:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:08,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:08,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774332980] [2021-05-02 15:01:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:01:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:08,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:01:08,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913228428] [2021-05-02 15:01:08,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774332980] [2021-05-02 15:01:08,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774332980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:08,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:08,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:01:08,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051049045] [2021-05-02 15:01:08,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:01:08,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:08,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:01:08,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:08,931 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:09,040 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 15:01:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:01:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 15:01:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:09,045 INFO L225 Difference]: With dead ends: 79 [2021-05-02 15:01:09,045 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 15:01:09,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 15:01:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 15:01:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:01:09,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 15:01:09,062 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 15:01:09,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:09,063 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 15:01:09,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:09,063 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 15:01:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:01:09,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:09,063 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:09,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:09,269 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-02 15:01:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:09,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499753382] [2021-05-02 15:01:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:09,278 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:09,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662876998] [2021-05-02 15:01:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:01:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:09,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:01:09,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:09,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499753382] [2021-05-02 15:01:09,518 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:09,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662876998] [2021-05-02 15:01:09,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662876998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:09,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:09,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:01:09,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549942938] [2021-05-02 15:01:09,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:01:09,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:09,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:01:09,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:01:09,519 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:09,661 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2021-05-02 15:01:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:01:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 15:01:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:09,663 INFO L225 Difference]: With dead ends: 111 [2021-05-02 15:01:09,663 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 15:01:09,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:01:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 15:01:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 15:01:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:01:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 15:01:09,674 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 15:01:09,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:09,674 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 15:01:09,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 15:01:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:01:09,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:09,675 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:09,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:01:09,889 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-02 15:01:09,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:09,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381659220] [2021-05-02 15:01:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:09,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:09,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333976286] [2021-05-02 15:01:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:09,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:01:09,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:09,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:01:10,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:10,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381659220] [2021-05-02 15:01:10,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:10,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333976286] [2021-05-02 15:01:10,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333976286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:10,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:10,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:01:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030419486] [2021-05-02 15:01:10,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:01:10,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:01:10,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:10,073 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:01:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:10,231 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2021-05-02 15:01:10,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:01:10,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 15:01:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:10,234 INFO L225 Difference]: With dead ends: 118 [2021-05-02 15:01:10,234 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 15:01:10,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:01:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 15:01:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 15:01:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:01:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 15:01:10,257 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 15:01:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:10,257 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 15:01:10,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:01:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 15:01:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:01:10,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:10,261 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:10,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:10,469 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:10,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-02 15:01:10,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:10,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680627590] [2021-05-02 15:01:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:10,477 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:10,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389747593] [2021-05-02 15:01:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:10,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 15:01:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:10,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:01:10,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:10,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680627590] [2021-05-02 15:01:10,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:10,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389747593] [2021-05-02 15:01:10,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389747593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:10,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:10,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:01:10,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87647925] [2021-05-02 15:01:10,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:01:10,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:10,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:01:10,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:10,714 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:10,896 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2021-05-02 15:01:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:01:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 15:01:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:10,897 INFO L225 Difference]: With dead ends: 124 [2021-05-02 15:01:10,897 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 15:01:10,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:01:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 15:01:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 15:01:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:01:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 15:01:10,915 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 15:01:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:10,915 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 15:01:10,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:10,915 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 15:01:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:01:10,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:10,915 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:11,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:11,129 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-02 15:01:11,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:11,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538392200] [2021-05-02 15:01:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:11,138 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:11,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450092087] [2021-05-02 15:01:11,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:11,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:11,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:11,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:01:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:11,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:01:11,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:11,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538392200] [2021-05-02 15:01:11,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:11,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450092087] [2021-05-02 15:01:11,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450092087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:11,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:11,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:01:11,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557487141] [2021-05-02 15:01:11,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:01:11,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:01:11,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:01:11,259 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:11,326 INFO L93 Difference]: Finished difference Result 168 states and 232 transitions. [2021-05-02 15:01:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:01:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 15:01:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:11,329 INFO L225 Difference]: With dead ends: 168 [2021-05-02 15:01:11,329 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 15:01:11,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:01:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 15:01:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 15:01:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:01:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 15:01:11,339 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 15:01:11,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:11,339 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 15:01:11,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 15:01:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:01:11,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:11,341 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:11,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:01:11,561 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-02 15:01:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:11,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56541144] [2021-05-02 15:01:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:11,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:11,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106039461] [2021-05-02 15:01:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:01:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:11,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 15:01:11,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56541144] [2021-05-02 15:01:11,715 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106039461] [2021-05-02 15:01:11,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106039461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:11,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:11,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:01:11,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717746515] [2021-05-02 15:01:11,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:01:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:11,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:01:11,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:01:11,716 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:01:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:11,798 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2021-05-02 15:01:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:01:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 15:01:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:11,800 INFO L225 Difference]: With dead ends: 154 [2021-05-02 15:01:11,800 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:01:11,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:01:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 15:01:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 15:01:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 15:01:11,829 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 15:01:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:11,829 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 15:01:11,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:01:11,829 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 15:01:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:01:11,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:11,830 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:12,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:12,051 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:12,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-02 15:01:12,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:12,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089248307] [2021-05-02 15:01:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:12,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:12,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697446132] [2021-05-02 15:01:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:01:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:12,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:01:12,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:12,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089248307] [2021-05-02 15:01:12,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:12,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697446132] [2021-05-02 15:01:12,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697446132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:12,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:12,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:01:12,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580017540] [2021-05-02 15:01:12,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:01:12,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:01:12,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:01:12,246 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:01:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:12,479 INFO L93 Difference]: Finished difference Result 185 states and 261 transitions. [2021-05-02 15:01:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:01:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 15:01:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:12,481 INFO L225 Difference]: With dead ends: 185 [2021-05-02 15:01:12,482 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 15:01:12,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:01:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 15:01:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 15:01:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 15:01:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 15:01:12,509 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 15:01:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:12,509 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 15:01:12,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:01:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 15:01:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:01:12,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:12,510 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:12,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:12,724 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-02 15:01:12,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:12,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211124945] [2021-05-02 15:01:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:12,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:12,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385143158] [2021-05-02 15:01:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 15:01:12,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:12,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 15:01:13,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211124945] [2021-05-02 15:01:13,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385143158] [2021-05-02 15:01:13,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385143158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:13,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:13,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:01:13,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261203793] [2021-05-02 15:01:13,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:01:13,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:01:13,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:01:13,217 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:01:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:13,753 INFO L93 Difference]: Finished difference Result 261 states and 355 transitions. [2021-05-02 15:01:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:01:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 64 [2021-05-02 15:01:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:13,761 INFO L225 Difference]: With dead ends: 261 [2021-05-02 15:01:13,761 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 15:01:13,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 15:01:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 15:01:13,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 15:01:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 15:01:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 15:01:13,789 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 15:01:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:13,789 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 15:01:13,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:01:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 15:01:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:01:13,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:13,790 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:14,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:01:14,005 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-02 15:01:14,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:14,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106525596] [2021-05-02 15:01:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:14,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:14,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741806855] [2021-05-02 15:01:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:14,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:14,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:14,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 15:01:14,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:14,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 15:01:14,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:14,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106525596] [2021-05-02 15:01:14,185 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:14,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741806855] [2021-05-02 15:01:14,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741806855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:14,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:14,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:01:14,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329762230] [2021-05-02 15:01:14,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:01:14,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:14,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:01:14,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:14,186 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:01:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:14,444 INFO L93 Difference]: Finished difference Result 327 states and 483 transitions. [2021-05-02 15:01:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:01:14,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 15:01:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:14,446 INFO L225 Difference]: With dead ends: 327 [2021-05-02 15:01:14,446 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 15:01:14,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:01:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 15:01:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 15:01:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 15:01:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 15:01:14,472 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 15:01:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:14,472 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 15:01:14,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:01:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 15:01:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 15:01:14,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:14,474 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:14,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:01:14,689 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-02 15:01:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:14,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201615483] [2021-05-02 15:01:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:14,694 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:14,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359163009] [2021-05-02 15:01:14,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:01:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:14,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 15:01:14,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:14,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201615483] [2021-05-02 15:01:14,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:14,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359163009] [2021-05-02 15:01:14,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359163009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:14,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:14,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:01:14,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628572416] [2021-05-02 15:01:14,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:01:14,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:01:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:01:14,971 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:01:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:15,234 INFO L93 Difference]: Finished difference Result 260 states and 364 transitions. [2021-05-02 15:01:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:01:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 15:01:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:15,235 INFO L225 Difference]: With dead ends: 260 [2021-05-02 15:01:15,235 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 15:01:15,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:01:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 15:01:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 246. [2021-05-02 15:01:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 149 states have internal predecessors, (172), 87 states have call successors, (87), 16 states have call predecessors, (87), 15 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-02 15:01:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 344 transitions. [2021-05-02 15:01:15,265 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 344 transitions. Word has length 74 [2021-05-02 15:01:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:15,265 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 344 transitions. [2021-05-02 15:01:15,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:01:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 344 transitions. [2021-05-02 15:01:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:01:15,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:15,265 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:15,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:01:15,476 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-02 15:01:15,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:15,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554937061] [2021-05-02 15:01:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:15,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:15,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250897610] [2021-05-02 15:01:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:01:15,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:15,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:01:15,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:15,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554937061] [2021-05-02 15:01:15,876 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:15,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250897610] [2021-05-02 15:01:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250897610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:15,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:15,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 15:01:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973166723] [2021-05-02 15:01:15,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 15:01:15,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:15,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 15:01:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:01:15,877 INFO L87 Difference]: Start difference. First operand 246 states and 344 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:01:17,065 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 15:01:17,429 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 15:01:17,600 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 15:01:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:18,710 INFO L93 Difference]: Finished difference Result 382 states and 552 transitions. [2021-05-02 15:01:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 15:01:18,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 15:01:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:18,712 INFO L225 Difference]: With dead ends: 382 [2021-05-02 15:01:18,712 INFO L226 Difference]: Without dead ends: 380 [2021-05-02 15:01:18,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1820.4ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 15:01:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-02 15:01:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 355. [2021-05-02 15:01:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 202 states have (on average 1.2227722772277227) internal successors, (247), 213 states have internal predecessors, (247), 135 states have call successors, (135), 18 states have call predecessors, (135), 17 states have return successors, (133), 123 states have call predecessors, (133), 133 states have call successors, (133) [2021-05-02 15:01:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 515 transitions. [2021-05-02 15:01:18,759 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 515 transitions. Word has length 72 [2021-05-02 15:01:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:18,759 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 515 transitions. [2021-05-02 15:01:18,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:01:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 515 transitions. [2021-05-02 15:01:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:18,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:18,762 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:18,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:18,979 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:18,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2021-05-02 15:01:18,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:18,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809222179] [2021-05-02 15:01:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:18,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:18,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287627427] [2021-05-02 15:01:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:19,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:19,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:19,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:01:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:19,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:01:19,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:19,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809222179] [2021-05-02 15:01:19,141 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:19,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287627427] [2021-05-02 15:01:19,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287627427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:19,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:19,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:01:19,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732943636] [2021-05-02 15:01:19,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:01:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:01:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:01:19,142 INFO L87 Difference]: Start difference. First operand 355 states and 515 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:01:19,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:19,230 INFO L93 Difference]: Finished difference Result 608 states and 880 transitions. [2021-05-02 15:01:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:01:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 15:01:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:19,232 INFO L225 Difference]: With dead ends: 608 [2021-05-02 15:01:19,232 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 15:01:19,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:01:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 15:01:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 310. [2021-05-02 15:01:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 182 states have (on average 1.2142857142857142) internal successors, (221), 183 states have internal predecessors, (221), 111 states have call successors, (111), 17 states have call predecessors, (111), 16 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2021-05-02 15:01:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 441 transitions. [2021-05-02 15:01:19,270 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 441 transitions. Word has length 77 [2021-05-02 15:01:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:19,270 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 441 transitions. [2021-05-02 15:01:19,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:01:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 441 transitions. [2021-05-02 15:01:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:19,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:19,271 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:19,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:01:19,485 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 3 times [2021-05-02 15:01:19,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:19,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078209032] [2021-05-02 15:01:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:19,496 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:19,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308002014] [2021-05-02 15:01:19,496 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:19,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:01:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 15:01:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:19,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 15:01:19,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:19,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078209032] [2021-05-02 15:01:19,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:19,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308002014] [2021-05-02 15:01:19,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308002014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:19,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:19,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:01:19,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315609298] [2021-05-02 15:01:19,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:01:19,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:19,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:01:19,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:01:19,669 INFO L87 Difference]: Start difference. First operand 310 states and 441 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:01:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:19,766 INFO L93 Difference]: Finished difference Result 354 states and 509 transitions. [2021-05-02 15:01:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:01:19,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 15:01:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:19,768 INFO L225 Difference]: With dead ends: 354 [2021-05-02 15:01:19,768 INFO L226 Difference]: Without dead ends: 352 [2021-05-02 15:01:19,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:19,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-02 15:01:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2021-05-02 15:01:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 195 states have (on average 1.2256410256410257) internal successors, (239), 196 states have internal predecessors, (239), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 15:01:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 499 transitions. [2021-05-02 15:01:19,803 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 499 transitions. Word has length 77 [2021-05-02 15:01:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:19,803 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 499 transitions. [2021-05-02 15:01:19,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:01:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 499 transitions. [2021-05-02 15:01:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:19,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:19,804 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:20,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:01:20,019 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 4 times [2021-05-02 15:01:20,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:20,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724451555] [2021-05-02 15:01:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:20,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:20,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427408984] [2021-05-02 15:01:20,034 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:20,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:01:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:20,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 15:01:20,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:20,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:01:20,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724451555] [2021-05-02 15:01:20,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427408984] [2021-05-02 15:01:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427408984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:20,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:20,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 15:01:20,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460008164] [2021-05-02 15:01:20,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 15:01:20,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 15:01:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-02 15:01:20,973 INFO L87 Difference]: Start difference. First operand 344 states and 499 transitions. Second operand has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 15:01:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:21,980 INFO L93 Difference]: Finished difference Result 401 states and 578 transitions. [2021-05-02 15:01:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 15:01:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 77 [2021-05-02 15:01:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:21,981 INFO L225 Difference]: With dead ends: 401 [2021-05-02 15:01:21,981 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:01:21,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-02 15:01:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:01:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:01:21,983 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 15:01:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:01:21,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2021-05-02 15:01:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:21,983 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:01:21,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 15:01:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:01:21,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:01:22,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:01:22,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:01:22,476 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 201 [2021-05-02 15:01:22,676 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 202 [2021-05-02 15:01:22,856 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 201 [2021-05-02 15:01:22,993 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 205 [2021-05-02 15:01:23,331 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 202 [2021-05-02 15:01:23,480 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 201 [2021-05-02 15:01:23,673 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 27 [2021-05-02 15:01:24,287 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 28 [2021-05-02 15:01:24,784 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 28 [2021-05-02 15:01:25,262 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 28 [2021-05-02 15:01:25,685 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 29 [2021-05-02 15:01:26,186 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 28 [2021-05-02 15:01:26,652 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 28 [2021-05-02 15:01:26,701 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 15:01:26,701 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:01:26,702 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 15:01:26,702 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:01:26,702 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 5))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~a~0 5) .cse1 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (<= main_~x~0 5) .cse1 (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-02 15:01:26,702 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 73) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5) (< main_~b~0 main_~a~0) (<= 1 main_~y~0)) [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 5))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~a~0 5) .cse1 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (<= main_~x~0 5) (< main_~b~0 main_~a~0) .cse1 (<= 1 main_~y~0)))) [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-05-02 15:01:26,702 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= main_~x~0 5) (<= 0 main_~x~0)) [2021-05-02 15:01:26,702 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~x~0 5) (<= 0 main_~x~0) (<= main_~y~0 5) (<= 0 main_~y~0)) [2021-05-02 15:01:26,702 INFO L198 CegarLoopUtils]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L194 CegarLoopUtils]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 5))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~a~0 5) .cse1 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (<= main_~x~0 5) (< main_~b~0 main_~a~0) .cse1 (<= 1 main_~y~0)))) [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L74(line 74) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5) (<= 0 main_~y~0)) [2021-05-02 15:01:26,703 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 5))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~a~0 5) .cse1 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (<= main_~x~0 5) (< main_~b~0 main_~a~0) .cse1 (<= 1 main_~y~0)))) [2021-05-02 15:01:26,703 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 5))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~a~0 5) .cse1 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (<= main_~x~0 5) (< main_~b~0 main_~a~0) .cse1 (<= 1 main_~y~0)))) [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 5)) (.cse1 (<= 1 main_~y~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~b~0 main_~y~0) (<= main_~a~0 5) .cse0 .cse1 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)) (and (<= 1 main_~x~0) (<= main_~x~0 5) .cse0 (< main_~b~0 main_~a~0) .cse1))) [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 5))) (or (and (= main_~r~0 0) (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~a~0 5) .cse1 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 (<= main_~x~0 5) (< main_~b~0 main_~a~0) .cse1 (<= 1 main_~y~0)))) [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 15:01:26,703 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 15:01:26,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:01:26 BoogieIcfgContainer [2021-05-02 15:01:26,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:01:26,715 INFO L168 Benchmark]: Toolchain (without parser) took 20832.73 ms. Allocated memory was 182.5 MB in the beginning and 380.6 MB in the end (delta: 198.2 MB). Free memory was 147.2 MB in the beginning and 154.1 MB in the end (delta: -6.9 MB). Peak memory consumption was 214.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:26,715 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 163.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:01:26,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.55 ms. Allocated memory is still 182.5 MB. Free memory was 147.0 MB in the beginning and 164.8 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:26,715 INFO L168 Benchmark]: Boogie Preprocessor took 37.03 ms. Allocated memory is still 182.5 MB. Free memory was 164.8 MB in the beginning and 163.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:26,715 INFO L168 Benchmark]: RCFGBuilder took 288.23 ms. Allocated memory is still 182.5 MB. Free memory was 163.2 MB in the beginning and 145.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:26,715 INFO L168 Benchmark]: TraceAbstraction took 20251.18 ms. Allocated memory was 182.5 MB in the beginning and 380.6 MB in the end (delta: 198.2 MB). Free memory was 145.4 MB in the beginning and 154.1 MB in the end (delta: -8.7 MB). Peak memory consumption was 212.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:26,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 163.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 250.55 ms. Allocated memory is still 182.5 MB. Free memory was 147.0 MB in the beginning and 164.8 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.03 ms. Allocated memory is still 182.5 MB. Free memory was 164.8 MB in the beginning and 163.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.23 ms. Allocated memory is still 182.5 MB. Free memory was 163.2 MB in the beginning and 145.9 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20251.18 ms. Allocated memory was 182.5 MB in the beginning and 380.6 MB in the end (delta: 198.2 MB). Free memory was 145.4 MB in the beginning and 154.1 MB in the end (delta: -8.7 MB). Peak memory consumption was 212.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15673.7ms, OverallIterations: 18, TraceHistogramMax: 8, EmptinessCheckTime: 25.1ms, AutomataDifference: 6688.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 4511.9ms, InitialAbstractionConstructionTime: 8.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 851 SDtfs, 904 SDslu, 4087 SDs, 0 SdLazy, 4432 SolverSat, 758 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2822.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1053 GetRequests, 812 SyntacticMatches, 2 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 3961.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=355occurred in iteration=15, InterpolantAutomatonStates: 207, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 391.9ms AutomataMinimizationTime, 18 MinimizatonAttempts, 306 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 312 PreInvPairs, 528 NumberOfFragments, 422 HoareAnnotationTreeSize, 312 FomulaSimplifications, 742448 FormulaSimplificationTreeSizeReduction, 1317.1ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 199204 FormulaSimplificationTreeSizeReductionInter, 3172.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 140.3ms SsaConstructionTime, 406.7ms SatisfiabilityAnalysisTime, 3775.3ms InterpolantComputationTime, 982 NumberOfCodeBlocks, 938 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 964 ConstructedInterpolants, 0 QuantifiedInterpolants, 5089 SizeOfPredicates, 94 NumberOfNonLiveVariables, 3224 ConjunctsInSsa, 441 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 792/974 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((r == 0 && q == 0) && 1 <= x) && b == y) && a == x) && a <= 5) && y <= 5) && 1 <= b) && p == 1) && s == 1) || ((((1 <= x && x <= 5) && y <= 5) && b < a) && 1 <= y) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((((r == 0 && q == 0) && a == x) && b == y) && a <= 5) && y <= 5) && 1 <= y) && 1 <= a) && p == 1) && s == 1) || ((((1 <= x && x <= 5) && y <= 5) && b < a) && 1 <= y) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((r == 0 && q == 0) && 1 <= x) && b == y) && a == x) && a <= 5) && y <= 5) && 1 <= b) && p == 1) && s == 1) || ((((1 <= x && x <= 5) && b < a) && y <= 5) && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...