/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/cohendiv-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:36:24,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:36:24,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:36:24,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:36:24,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:36:24,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:36:24,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:36:24,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:36:24,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:36:24,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:36:24,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:36:24,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:36:24,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:36:24,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:36:24,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:36:24,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:36:24,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:36:24,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:36:24,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:36:24,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:36:24,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:36:24,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:36:24,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:36:24,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:36:24,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:36:24,932 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:36:24,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:36:24,932 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:36:24,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:36:24,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:36:24,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:36:24,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:36:24,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:36:24,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:36:24,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:36:24,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:36:24,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:36:24,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:36:24,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:36:24,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:36:24,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:36:24,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:36:24,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:36:24,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:36:24,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:36:24,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:36:24,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:36:24,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:36:24,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:36:24,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:36:25,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:36:25,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:36:25,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:36:25,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:36:25,380 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:36:25,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohendiv-ll.c [2021-05-02 13:36:25,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873f35775/e9a9f0bef96b48ee8d839f6f092d70a9/FLAG847af6bfd [2021-05-02 13:36:25,846 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:36:25,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohendiv-ll.c [2021-05-02 13:36:25,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873f35775/e9a9f0bef96b48ee8d839f6f092d70a9/FLAG847af6bfd [2021-05-02 13:36:26,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/873f35775/e9a9f0bef96b48ee8d839f6f092d70a9 [2021-05-02 13:36:26,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:36:26,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:36:26,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:36:26,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:36:26,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:36:26,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a53301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26, skipping insertion in model container [2021-05-02 13:36:26,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:36:26,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:36:26,370 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/cohendiv-ll.c[576,589] [2021-05-02 13:36:26,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:36:26,385 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:36:26,393 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/cohendiv-ll.c[576,589] [2021-05-02 13:36:26,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:36:26,411 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:36:26,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26 WrapperNode [2021-05-02 13:36:26,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:36:26,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:36:26,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:36:26,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:36:26,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... [2021-05-02 13:36:26,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:36:26,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:36:26,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:36:26,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:36:26,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:36:26,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:36:26,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:36:26,669 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:36:26,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:36:26,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:36:26,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:36:26,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:36:26,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:36:26,670 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:36:26,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:36:26,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:36:26,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:36:26,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:36:26,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:36:26,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:36:26,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:36:26,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:36:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:36:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:36:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:36:27,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:36:27,037 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:36:27,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:36:27 BoogieIcfgContainer [2021-05-02 13:36:27,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:36:27,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:36:27,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:36:27,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:36:27,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:36:26" (1/3) ... [2021-05-02 13:36:27,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111a5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:36:27, skipping insertion in model container [2021-05-02 13:36:27,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:26" (2/3) ... [2021-05-02 13:36:27,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111a5b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:36:27, skipping insertion in model container [2021-05-02 13:36:27,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:36:27" (3/3) ... [2021-05-02 13:36:27,044 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll.c [2021-05-02 13:36:27,054 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:36:27,058 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:36:27,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:36:27,114 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:36:27,114 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:36:27,115 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:36:27,115 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:36:27,115 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:36:27,121 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:36:27,121 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:36:27,121 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:36:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:36:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:36:27,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:27,146 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:27,156 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1389800432, now seen corresponding path program 1 times [2021-05-02 13:36:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:27,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051827200] [2021-05-02 13:36:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:27,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:36:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:36:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:36:27,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:27,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051827200] [2021-05-02 13:36:27,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051827200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:27,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:27,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:36:27,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984805989] [2021-05-02 13:36:27,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:36:27,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:36:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:36:27,460 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:36:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:27,616 INFO L93 Difference]: Finished difference Result 63 states and 95 transitions. [2021-05-02 13:36:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:36:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:36:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:27,625 INFO L225 Difference]: With dead ends: 63 [2021-05-02 13:36:27,625 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 13:36:27,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:36:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 13:36:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 13:36:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:36:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-05-02 13:36:27,683 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2021-05-02 13:36:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:27,684 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-05-02 13:36:27,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:36:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-05-02 13:36:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:36:27,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:27,687 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:27,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:36:27,688 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2071348352, now seen corresponding path program 1 times [2021-05-02 13:36:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:27,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70747903] [2021-05-02 13:36:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:27,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:27,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216680138] [2021-05-02 13:36:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:36:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:27,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:27,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:36:27,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:27,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70747903] [2021-05-02 13:36:27,895 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:27,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216680138] [2021-05-02 13:36:27,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216680138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:27,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:27,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:36:27,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890115743] [2021-05-02 13:36:27,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:36:27,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:36:27,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:36:27,898 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:36:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:28,005 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 13:36:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:36:28,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:36:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:28,007 INFO L225 Difference]: With dead ends: 42 [2021-05-02 13:36:28,007 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 13:36:28,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:36:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 13:36:28,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-05-02 13:36:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:36:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 13:36:28,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 17 [2021-05-02 13:36:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:28,028 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 13:36:28,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:36:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 13:36:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:36:28,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:28,029 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:28,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:36:28,254 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash 933849696, now seen corresponding path program 1 times [2021-05-02 13:36:28,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:28,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134424252] [2021-05-02 13:36:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:28,265 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:28,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226597215] [2021-05-02 13:36:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:28,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:36:28,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:28,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:36:28,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:28,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134424252] [2021-05-02 13:36:28,469 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:28,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226597215] [2021-05-02 13:36:28,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226597215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:28,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:28,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:36:28,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78268093] [2021-05-02 13:36:28,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:36:28,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:36:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:36:28,470 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:28,577 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-05-02 13:36:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:36:28,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:36:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:28,579 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:36:28,579 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:36:28,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:36:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:36:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 13:36:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 13:36:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-05-02 13:36:28,592 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 22 [2021-05-02 13:36:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:28,592 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-05-02 13:36:28,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-05-02 13:36:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:36:28,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:28,593 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:28,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:28,808 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash 721086345, now seen corresponding path program 1 times [2021-05-02 13:36:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:28,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296994069] [2021-05-02 13:36:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:28,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:28,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69316726] [2021-05-02 13:36:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:36:28,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:28,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:36:28,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:28,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296994069] [2021-05-02 13:36:28,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:28,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69316726] [2021-05-02 13:36:28,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69316726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:28,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:28,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:36:28,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330953200] [2021-05-02 13:36:28,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:36:28,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:36:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:36:28,952 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:36:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:29,034 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2021-05-02 13:36:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:36:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 13:36:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:29,035 INFO L225 Difference]: With dead ends: 76 [2021-05-02 13:36:29,035 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 13:36:29,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:36:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 13:36:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-05-02 13:36:29,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 13:36:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2021-05-02 13:36:29,045 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 29 [2021-05-02 13:36:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:29,045 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2021-05-02 13:36:29,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:36:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2021-05-02 13:36:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:36:29,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:29,046 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1] [2021-05-02 13:36:29,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:29,262 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -607067127, now seen corresponding path program 1 times [2021-05-02 13:36:29,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:29,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179865232] [2021-05-02 13:36:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:29,287 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:29,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946742958] [2021-05-02 13:36:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:36:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:29,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:36:29,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179865232] [2021-05-02 13:36:29,456 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:29,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946742958] [2021-05-02 13:36:29,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946742958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:29,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:29,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:36:29,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811027126] [2021-05-02 13:36:29,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:36:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:36:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:36:29,457 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:36:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:29,552 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 13:36:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:36:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 13:36:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:29,556 INFO L225 Difference]: With dead ends: 73 [2021-05-02 13:36:29,556 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 13:36:29,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:36:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 13:36:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 13:36:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 13:36:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2021-05-02 13:36:29,576 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 39 [2021-05-02 13:36:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:29,576 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2021-05-02 13:36:29,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 13:36:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2021-05-02 13:36:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 13:36:29,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:29,577 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 13:36:29,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:29,798 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:29,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1279335692, now seen corresponding path program 1 times [2021-05-02 13:36:29,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:29,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680295888] [2021-05-02 13:36:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:29,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:29,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887217830] [2021-05-02 13:36:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:29,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:36:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:29,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:29,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 13:36:30,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:30,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680295888] [2021-05-02 13:36:30,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:30,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887217830] [2021-05-02 13:36:30,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887217830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:30,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:30,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:36:30,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277629337] [2021-05-02 13:36:30,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:36:30,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:30,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:36:30,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:36:30,107 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:36:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:30,261 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2021-05-02 13:36:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:36:30,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 13:36:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:30,264 INFO L225 Difference]: With dead ends: 77 [2021-05-02 13:36:30,264 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 13:36:30,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:36:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 13:36:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-02 13:36:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 13:36:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2021-05-02 13:36:30,275 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2021-05-02 13:36:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:30,276 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2021-05-02 13:36:30,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:36:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2021-05-02 13:36:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 13:36:30,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:30,277 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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 13:36:30,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:36:30,492 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1789016266, now seen corresponding path program 1 times [2021-05-02 13:36:30,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:30,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336356367] [2021-05-02 13:36:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:30,499 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:30,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031356482] [2021-05-02 13:36:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:30,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:36:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:30,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 13:36:30,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:30,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336356367] [2021-05-02 13:36:30,761 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:30,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031356482] [2021-05-02 13:36:30,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031356482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:30,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:30,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:36:30,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211790072] [2021-05-02 13:36:30,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:36:30,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:36:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:36:30,763 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 13:36:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:30,906 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2021-05-02 13:36:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:36:30,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-05-02 13:36:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:30,909 INFO L225 Difference]: With dead ends: 135 [2021-05-02 13:36:30,909 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:36:30,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:36:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:36:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-05-02 13:36:30,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 13:36:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2021-05-02 13:36:30,919 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 52 [2021-05-02 13:36:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:30,919 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2021-05-02 13:36:30,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 13:36:30,919 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2021-05-02 13:36:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 13:36:30,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:30,920 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:31,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:31,136 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:31,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1695528703, now seen corresponding path program 1 times [2021-05-02 13:36:31,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:31,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204051001] [2021-05-02 13:36:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:31,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:31,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855509254] [2021-05-02 13:36:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:31,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:36:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:31,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 13:36:31,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:31,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204051001] [2021-05-02 13:36:31,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:31,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855509254] [2021-05-02 13:36:31,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855509254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:31,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:31,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 13:36:31,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445680840] [2021-05-02 13:36:31,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:36:31,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:31,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:36:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:36:31,793 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 13:36:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:32,186 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2021-05-02 13:36:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 13:36:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 75 [2021-05-02 13:36:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:32,187 INFO L225 Difference]: With dead ends: 127 [2021-05-02 13:36:32,187 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 13:36:32,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:36:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 13:36:32,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2021-05-02 13:36:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 71 states have internal predecessors, (77), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 13:36:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 147 transitions. [2021-05-02 13:36:32,200 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 147 transitions. Word has length 75 [2021-05-02 13:36:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:32,200 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 147 transitions. [2021-05-02 13:36:32,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 13:36:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 147 transitions. [2021-05-02 13:36:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 13:36:32,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:32,202 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:32,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:32,421 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash 807791338, now seen corresponding path program 2 times [2021-05-02 13:36:32,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:32,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217168097] [2021-05-02 13:36:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:32,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:32,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190011279] [2021-05-02 13:36:32,428 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 13:36:32,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:36:32,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:36:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:36:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:32,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:32,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:33,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:33,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:33,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:33,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:33,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:33,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 86 proven. 34 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-05-02 13:36:33,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:33,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217168097] [2021-05-02 13:36:33,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:33,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190011279] [2021-05-02 13:36:33,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190011279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:33,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:33,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 13:36:33,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449051597] [2021-05-02 13:36:33,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:36:33,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:33,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:36:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:36:33,223 INFO L87 Difference]: Start difference. First operand 119 states and 147 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 13:36:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:33,788 INFO L93 Difference]: Finished difference Result 159 states and 203 transitions. [2021-05-02 13:36:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:36:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) Word has length 98 [2021-05-02 13:36:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:33,790 INFO L225 Difference]: With dead ends: 159 [2021-05-02 13:36:33,790 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 13:36:33,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:36:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 13:36:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-05-02 13:36:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 86 states have (on average 1.127906976744186) internal successors, (97), 88 states have internal predecessors, (97), 49 states have call successors, (49), 16 states have call predecessors, (49), 15 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 13:36:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2021-05-02 13:36:33,806 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 98 [2021-05-02 13:36:33,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:33,807 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2021-05-02 13:36:33,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 13:36:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2021-05-02 13:36:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 13:36:33,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:33,808 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:34,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 13:36:34,024 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:34,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:34,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1400276907, now seen corresponding path program 3 times [2021-05-02 13:36:34,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:34,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172608184] [2021-05-02 13:36:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:34,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:34,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577783935] [2021-05-02 13:36:34,037 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:34,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:36:34,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:36:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:36:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:34,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:34,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:34,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:34,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:34,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:34,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 123 proven. 35 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-05-02 13:36:34,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:34,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172608184] [2021-05-02 13:36:34,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:34,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577783935] [2021-05-02 13:36:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577783935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:34,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:34,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:36:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792126534] [2021-05-02 13:36:34,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:36:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:36:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:36:34,286 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 13:36:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:42,565 INFO L93 Difference]: Finished difference Result 161 states and 205 transitions. [2021-05-02 13:36:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:36:42,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) Word has length 105 [2021-05-02 13:36:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:42,568 INFO L225 Difference]: With dead ends: 161 [2021-05-02 13:36:42,568 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:36:42,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:36:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:36:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:36:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:36:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:36:42,573 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2021-05-02 13:36:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:42,573 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:36:42,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 13:36:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:36:42,573 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:36:42,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:42,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:36:43,372 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 20 [2021-05-02 13:36:43,715 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 15 [2021-05-02 13:36:43,953 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:36:43,954 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L198 CegarLoopUtils]: For program point L62(line 62) no Hoare annotation was computed. [2021-05-02 13:36:43,954 INFO L201 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-05-02 13:36:43,955 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 13:36:43,955 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 64) no Hoare annotation was computed. [2021-05-02 13:36:43,955 INFO L198 CegarLoopUtils]: For program point L48(lines 45 57) no Hoare annotation was computed. [2021-05-02 13:36:43,955 INFO L194 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 1 main_~r~0)) [2021-05-02 13:36:43,955 INFO L194 CegarLoopUtils]: At program point L46-1(line 46) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (= (+ main_~x~0 .cse0) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= 1 main_~r~0))) [2021-05-02 13:36:43,955 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 64) no Hoare annotation was computed. [2021-05-02 13:36:43,955 INFO L198 CegarLoopUtils]: For program point L38(lines 36 60) no Hoare annotation was computed. [2021-05-02 13:36:43,955 INFO L194 CegarLoopUtils]: At program point L36-2(lines 36 60) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (= (+ main_~x~0 .cse0) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2021-05-02 13:36:43,955 INFO L194 CegarLoopUtils]: At program point L36-3(lines 36 60) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0))) (or (and (= main_~q~0 0) (= main_~x~0 main_~r~0) .cse0) (let ((.cse1 (* main_~y~0 main_~a~0))) (and (= (+ main_~x~0 .cse1) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) .cse0 (= main_~b~0 .cse1))))) [2021-05-02 13:36:43,955 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 64) the Hoare annotation is: true [2021-05-02 13:36:43,955 INFO L194 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (= (+ main_~x~0 .cse0) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= 1 main_~r~0))) [2021-05-02 13:36:43,955 INFO L198 CegarLoopUtils]: For program point L53-1(line 53) no Hoare annotation was computed. [2021-05-02 13:36:43,955 INFO L194 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (= (+ main_~x~0 .cse0) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= 1 main_~r~0))) [2021-05-02 13:36:43,955 INFO L194 CegarLoopUtils]: At program point L45-2(lines 45 57) the Hoare annotation is: (and (= (+ (* main_~y~0 main_~q~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 1 main_~r~0)) [2021-05-02 13:36:43,956 INFO L198 CegarLoopUtils]: For program point L45-3(lines 45 57) no Hoare annotation was computed. [2021-05-02 13:36:43,956 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (= (+ main_~x~0 .cse0) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2021-05-02 13:36:43,956 INFO L194 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (= (+ main_~x~0 .cse0) (+ (* main_~y~0 main_~q~0) main_~b~0 main_~r~0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2021-05-02 13:36:43,956 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 13:36:43,956 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 13:36:43,956 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 13:36:43,957 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:36:43,957 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:36:43,957 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 13:36:43,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:36:43 BoogieIcfgContainer [2021-05-02 13:36:43,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:36:43,971 INFO L168 Benchmark]: Toolchain (without parser) took 17719.27 ms. Allocated memory was 181.4 MB in the beginning and 262.1 MB in the end (delta: 80.7 MB). Free memory was 145.0 MB in the beginning and 96.0 MB in the end (delta: 49.0 MB). Peak memory consumption was 133.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:43,971 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 161.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:36:43,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.54 ms. Allocated memory is still 181.4 MB. Free memory was 144.8 MB in the beginning and 135.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:43,972 INFO L168 Benchmark]: Boogie Preprocessor took 104.51 ms. Allocated memory is still 181.4 MB. Free memory was 135.0 MB in the beginning and 164.4 MB in the end (delta: -29.4 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:43,972 INFO L168 Benchmark]: RCFGBuilder took 520.09 ms. Allocated memory is still 181.4 MB. Free memory was 164.4 MB in the beginning and 148.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:43,972 INFO L168 Benchmark]: TraceAbstraction took 16931.58 ms. Allocated memory was 181.4 MB in the beginning and 262.1 MB in the end (delta: 80.7 MB). Free memory was 147.7 MB in the beginning and 96.0 MB in the end (delta: 51.7 MB). Peak memory consumption was 137.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:43,972 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 161.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 158.54 ms. Allocated memory is still 181.4 MB. Free memory was 144.8 MB in the beginning and 135.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 104.51 ms. Allocated memory is still 181.4 MB. Free memory was 135.0 MB in the beginning and 164.4 MB in the end (delta: -29.4 MB). Peak memory consumption was 2.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 520.09 ms. Allocated memory is still 181.4 MB. Free memory was 164.4 MB in the beginning and 148.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16931.58 ms. Allocated memory was 181.4 MB in the beginning and 262.1 MB in the end (delta: 80.7 MB). Free memory was 147.7 MB in the beginning and 96.0 MB in the end (delta: 51.7 MB). Peak memory consumption was 137.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15670.0ms, OverallIterations: 10, TraceHistogramMax: 16, EmptinessCheckTime: 21.0ms, AutomataDifference: 10141.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1178.6ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 335 SDtfs, 282 SDslu, 1543 SDs, 0 SdLazy, 1845 SolverSat, 212 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 9183.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 509 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1223.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=9, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 148.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 24 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 16 LocationsWithAnnotation, 88 PreInvPairs, 160 NumberOfFragments, 249 HoareAnnotationTreeSize, 88 FomulaSimplifications, 6270 FormulaSimplificationTreeSizeReduction, 402.2ms HoareSimplificationTime, 16 FomulaSimplificationsInter, 2498 FormulaSimplificationTreeSizeReductionInter, 761.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 71.7ms SsaConstructionTime, 248.0ms SatisfiabilityAnalysisTime, 2517.0ms InterpolantComputationTime, 499 NumberOfCodeBlocks, 447 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 489 ConstructedInterpolants, 0 QuantifiedInterpolants, 2542 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1489 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 1162/1263 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: 45]: Loop Invariant Derived loop invariant: ((y * q + r == x && 1 <= y) && b == y * a) && 1 <= r - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (x + y * a == y * q + b + r && 1 <= y) && b == y * a RESULT: Ultimate proved your program to be correct! Received shutdown request...