/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:12:11,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:12:11,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:12:11,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:12:11,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:12:11,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:12:11,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:12:11,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:12:11,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:12:11,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:12:11,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:12:11,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:12:11,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:12:11,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:12:11,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:12:11,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:12:11,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:12:11,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:12:11,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:12:11,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:12:11,791 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 14:12:11,812 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:12:11,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:12:11,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:12:11,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:12:11,815 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:12:11,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:12:11,815 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:12:11,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:12:11,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:12:11,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:12:11,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:12:11,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:12:11,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:12:11,816 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:12:11,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:12:11,822 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:12:11,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:12:11,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:12:11,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:12:11,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:12:11,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:12:11,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:12:11,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:12:11,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:12:11,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:12:11,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:12:11,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:12:11,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:12:11,831 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:12:12,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:12:12,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:12:12,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:12:12,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:12:12,083 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:12:12,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2021-05-02 14:12:12,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20cf584c/a32f29cd7e524ce4acd0db53ed712b4d/FLAG32c5e9641 [2021-05-02 14:12:12,480 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:12:12,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c [2021-05-02 14:12:12,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20cf584c/a32f29cd7e524ce4acd0db53ed712b4d/FLAG32c5e9641 [2021-05-02 14:12:12,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f20cf584c/a32f29cd7e524ce4acd0db53ed712b4d [2021-05-02 14:12:12,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:12:12,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:12:12,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:12:12,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:12:12,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:12:12,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ee1de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12, skipping insertion in model container [2021-05-02 14:12:12,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:12:12,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:12:12,604 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c[576,589] [2021-05-02 14:12:12,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:12:12,618 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:12:12,626 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound2.c[576,589] [2021-05-02 14:12:12,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:12:12,638 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:12:12,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12 WrapperNode [2021-05-02 14:12:12,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:12:12,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:12:12,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:12:12,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:12:12,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (1/1) ... [2021-05-02 14:12:12,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:12:12,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:12:12,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:12:12,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:12:12,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (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 14:12:12,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:12:12,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:12:12,741 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:12:12,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:12:12,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:12:12,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:12:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:12:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:12:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:12:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:12:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:12:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:12:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:12:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:12:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:12:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:12:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:12:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:12:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:12:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:12:12,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:12:12,948 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:12:12,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:12:12 BoogieIcfgContainer [2021-05-02 14:12:12,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:12:12,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:12:12,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:12:12,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:12:12,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:12:12" (1/3) ... [2021-05-02 14:12:12,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d7ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:12:12, skipping insertion in model container [2021-05-02 14:12:12,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:12:12" (2/3) ... [2021-05-02 14:12:12,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419d7ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:12:12, skipping insertion in model container [2021-05-02 14:12:12,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:12:12" (3/3) ... [2021-05-02 14:12:12,953 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound2.c [2021-05-02 14:12:12,957 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:12:12,959 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:12:12,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:12:12,999 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:12:13,000 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:12:13,000 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:12:13,000 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:12:13,000 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:12:13,000 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:12:13,000 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:12:13,000 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:12:13,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:12:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:12:13,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:13,015 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:13,015 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2021-05-02 14:12:13,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:13,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114881139] [2021-05-02 14:12:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:13,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:12:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:13,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:12:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:13,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:12:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:13,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:12:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:12:13,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:13,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114881139] [2021-05-02 14:12:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114881139] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:13,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:12:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892609053] [2021-05-02 14:12:13,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:12:13,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:12:13,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:12:13,236 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 14:12:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:13,360 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2021-05-02 14:12:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:12:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 28 [2021-05-02 14:12:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:13,367 INFO L225 Difference]: With dead ends: 71 [2021-05-02 14:12:13,367 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:12:13,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:12:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:12:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:12:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:12:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 14:12:13,405 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-02 14:12:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:13,415 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 14:12:13,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 14:12:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 14:12:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:12:13,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:13,417 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:13,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:12:13,418 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2021-05-02 14:12:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:13,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117423832] [2021-05-02 14:12:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:13,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:13,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319194670] [2021-05-02 14:12:13,439 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 14:12:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:13,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:12:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:13,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:13,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:13,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:13,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:13,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:12:13,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:13,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117423832] [2021-05-02 14:12:13,681 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:13,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319194670] [2021-05-02 14:12:13,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319194670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:13,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:13,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:12:13,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452701874] [2021-05-02 14:12:13,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:12:13,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:12:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:12:13,683 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:12:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:13,779 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 14:12:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:12:13,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 14:12:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:13,782 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:12:13,782 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:12:13,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:12:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:12:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 14:12:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:12:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 14:12:13,804 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-02 14:12:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:13,804 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 14:12:13,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:12:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 14:12:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:12:13,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:13,805 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 14:12:14,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:12:14,013 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2021-05-02 14:12:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:14,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302189269] [2021-05-02 14:12:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:14,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:14,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605875139] [2021-05-02 14:12:14,024 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 14:12:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:14,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:12:14,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:14,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:12:14,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302189269] [2021-05-02 14:12:14,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:14,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605875139] [2021-05-02 14:12:14,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605875139] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:14,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:14,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 14:12:14,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468837623] [2021-05-02 14:12:14,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:12:14,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:14,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:12:14,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:12:14,276 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:12:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:14,390 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-02 14:12:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:12:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-02 14:12:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:14,392 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:12:14,392 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:12:14,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:12:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:12:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:12:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 14:12:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-02 14:12:14,401 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-02 14:12:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:14,401 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-02 14:12:14,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:12:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-02 14:12:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 14:12:14,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:14,402 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:14,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:14,609 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2021-05-02 14:12:14,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:14,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968432750] [2021-05-02 14:12:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:14,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:14,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295810842] [2021-05-02 14:12:14,620 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 14:12:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:14,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:12:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:14,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:12:14,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:14,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968432750] [2021-05-02 14:12:14,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:14,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295810842] [2021-05-02 14:12:14,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295810842] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:12:14,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:12:14,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:12:14,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914344829] [2021-05-02 14:12:14,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:12:14,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:14,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:12:14,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:12:14,789 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 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 14:12:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:14,917 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-05-02 14:12:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:12:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 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 40 [2021-05-02 14:12:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:14,919 INFO L225 Difference]: With dead ends: 79 [2021-05-02 14:12:14,919 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 14:12:14,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:12:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 14:12:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-02 14:12:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:12:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-02 14:12:14,937 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-02 14:12:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:14,938 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-02 14:12:14,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 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 14:12:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-02 14:12:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:12:14,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:14,939 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:15,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:15,145 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2021-05-02 14:12:15,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:15,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369408541] [2021-05-02 14:12:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:15,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:15,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867366706] [2021-05-02 14:12:15,160 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 14:12:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:12:15,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:15,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 14:12:15,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:15,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369408541] [2021-05-02 14:12:15,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:15,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867366706] [2021-05-02 14:12:15,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867366706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:15,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:15,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:12:15,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875397896] [2021-05-02 14:12:15,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:12:15,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:12:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:12:15,339 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:12:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:15,500 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2021-05-02 14:12:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:12:15,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-02 14:12:15,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:15,505 INFO L225 Difference]: With dead ends: 76 [2021-05-02 14:12:15,505 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 14:12:15,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:12:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 14:12:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 14:12:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:12:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-05-02 14:12:15,526 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 56 [2021-05-02 14:12:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:15,526 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-05-02 14:12:15,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:12:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-05-02 14:12:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 14:12:15,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:15,527 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:12:15,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:15,729 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2021-05-02 14:12:15,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:15,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459821120] [2021-05-02 14:12:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:15,749 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:15,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327413691] [2021-05-02 14:12:15,750 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 14:12:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 14:12:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:15,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:15,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 14:12:16,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:16,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459821120] [2021-05-02 14:12:16,046 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:16,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327413691] [2021-05-02 14:12:16,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327413691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:16,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:16,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:12:16,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353741125] [2021-05-02 14:12:16,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:12:16,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:16,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:12:16,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:12:16,047 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:12:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:16,227 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2021-05-02 14:12:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:12:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2021-05-02 14:12:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:16,229 INFO L225 Difference]: With dead ends: 130 [2021-05-02 14:12:16,229 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 14:12:16,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:12:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 14:12:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-05-02 14:12:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:12:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2021-05-02 14:12:16,239 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 63 [2021-05-02 14:12:16,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:16,239 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2021-05-02 14:12:16,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:12:16,239 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2021-05-02 14:12:16,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 14:12:16,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:12:16,240 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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, 1, 1] [2021-05-02 14:12:16,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:12:16,456 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:12:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:12:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2021-05-02 14:12:16,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:12:16,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106417158] [2021-05-02 14:12:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:12:16,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:12:16,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639592413] [2021-05-02 14:12:16,465 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 14:12:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:12:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:12:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:12:16,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:16,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:12:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:12:17,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:12:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106417158] [2021-05-02 14:12:17,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:12:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639592413] [2021-05-02 14:12:17,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639592413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:12:17,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:12:17,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:12:17,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310775964] [2021-05-02 14:12:17,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:12:17,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:12:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:12:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:12:17,018 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:12:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:12:17,188 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2021-05-02 14:12:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:12:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2021-05-02 14:12:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:12:17,189 INFO L225 Difference]: With dead ends: 119 [2021-05-02 14:12:17,190 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:12:17,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:12:17,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:12:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:12:17,193 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 14:12:17,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:12:17,193 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2021-05-02 14:12:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:12:17,193 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:12:17,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:12:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:12:17,193 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:12:17,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:12:17,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:12:17,726 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2021-05-02 14:12:17,845 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-05-02 14:12:18,003 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-05-02 14:12:18,150 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2021-05-02 14:12:18,362 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-05-02 14:12:18,478 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2021-05-02 14:12:18,636 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-05-02 14:12:18,653 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 14:12:18,653 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 14:12:18,653 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 14:12:18,653 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:12:18,653 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 14:12:18,654 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:12:18,654 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point L64(line 64) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2021-05-02 14:12:18,654 INFO L194 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2) (<= 0 main_~y~0) (<= main_~y~0 2)) [2021-05-02 14:12:18,654 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 66) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L198 CegarLoopUtils]: For program point L50(lines 47 59) no Hoare annotation was computed. [2021-05-02 14:12:18,654 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= main_~x~0 2)) (.cse3 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~a~0 2) (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and .cse0 (= main_~b~0 main_~y~0) .cse1 .cse2 (<= main_~y~0 main_~r~0) .cse3 .cse4))) [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= main_~x~0 2)) (.cse3 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~a~0 2) (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and .cse0 (= main_~b~0 main_~y~0) .cse1 .cse2 (<= main_~y~0 main_~r~0) .cse3 .cse4))) [2021-05-02 14:12:18,655 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 66) no Hoare annotation was computed. [2021-05-02 14:12:18,655 INFO L198 CegarLoopUtils]: For program point L40(lines 38 62) no Hoare annotation was computed. [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 2)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and (<= main_~y~0 (div (+ main_~x~0 (* main_~r~0 (- 1))) 2)) .cse0 .cse1 .cse2 (< (div main_~r~0 (- 2)) 1) (= main_~q~0 2)) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) (= main_~b~0 main_~y~0) .cse0 .cse2 (= main_~q~0 1) (<= main_~y~0 main_~x~0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) .cse0 .cse1 .cse2 (= main_~a~0 0) (<= main_~y~0 2)))) [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse1 (<= 1 main_~y~0)) (.cse0 (<= main_~x~0 2)) (.cse2 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and (<= main_~y~0 (div (+ main_~x~0 (* main_~r~0 (- 1))) 2)) .cse0 .cse1 .cse2 (< (div main_~r~0 (- 2)) 1) (= main_~q~0 2)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) .cse0 .cse1 (<= main_~y~0 2)) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) .cse0 .cse2 (= main_~q~0 1) (<= main_~y~0 main_~x~0)))) [2021-05-02 14:12:18,655 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~a~0))) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= (* 2 .cse0) main_~r~0) (<= main_~x~0 2) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2021-05-02 14:12:18,655 INFO L198 CegarLoopUtils]: For program point L55-1(line 55) no Hoare annotation was computed. [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= main_~x~0 2)) (.cse3 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~a~0 2) (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and .cse0 (= main_~b~0 main_~y~0) .cse1 .cse2 (<= main_~y~0 main_~r~0) .cse3 .cse4))) [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= main_~x~0 2)) (.cse3 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~a~0 2) (<= (* 2 (div main_~b~0 2)) main_~r~0)) (and .cse0 (= main_~b~0 main_~y~0) .cse1 .cse2 (<= main_~y~0 main_~r~0) .cse3 .cse4))) [2021-05-02 14:12:18,655 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 2)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and (<= main_~y~0 (div (+ main_~x~0 (* main_~r~0 (- 1))) 2)) .cse0 .cse1 .cse2 (< (div main_~r~0 (- 2)) 1) (= main_~q~0 2)) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) (= main_~b~0 main_~y~0) .cse0 .cse2 (= main_~q~0 1) (<= main_~y~0 main_~x~0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) .cse0 .cse1 .cse2 (= main_~a~0 0) (<= main_~y~0 2)))) [2021-05-02 14:12:18,655 INFO L194 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 2)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and (<= main_~y~0 (div (+ main_~x~0 (* main_~r~0 (- 1))) 2)) .cse0 .cse1 .cse2 (< (div main_~r~0 (- 2)) 1) (= main_~q~0 2)) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) .cse0 .cse2 (= main_~q~0 1) (<= main_~y~0 main_~x~0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) .cse0 .cse1 .cse2 (<= main_~y~0 2)))) [2021-05-02 14:12:18,656 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 14:12:18,656 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 14:12:18,656 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 14:12:18,656 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:12:18,656 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:12:18,656 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 14:12:18,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:12:18 BoogieIcfgContainer [2021-05-02 14:12:18,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:12:18,668 INFO L168 Benchmark]: Toolchain (without parser) took 6162.27 ms. Allocated memory was 200.3 MB in the beginning and 289.4 MB in the end (delta: 89.1 MB). Free memory was 165.8 MB in the beginning and 196.3 MB in the end (delta: -30.5 MB). Peak memory consumption was 152.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:18,668 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 200.3 MB. Free memory was 182.1 MB in the beginning and 182.0 MB in the end (delta: 120.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:12:18,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.74 ms. Allocated memory is still 200.3 MB. Free memory was 165.6 MB in the beginning and 155.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:18,668 INFO L168 Benchmark]: Boogie Preprocessor took 44.40 ms. Allocated memory is still 200.3 MB. Free memory was 155.8 MB in the beginning and 183.3 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:18,669 INFO L168 Benchmark]: RCFGBuilder took 264.98 ms. Allocated memory is still 200.3 MB. Free memory was 183.3 MB in the beginning and 167.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:18,669 INFO L168 Benchmark]: TraceAbstraction took 5718.07 ms. Allocated memory was 200.3 MB in the beginning and 289.4 MB in the end (delta: 89.1 MB). Free memory was 166.7 MB in the beginning and 196.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 153.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:12:18,669 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 200.3 MB. Free memory was 182.1 MB in the beginning and 182.0 MB in the end (delta: 120.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 129.74 ms. Allocated memory is still 200.3 MB. Free memory was 165.6 MB in the beginning and 155.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.40 ms. Allocated memory is still 200.3 MB. Free memory was 155.8 MB in the beginning and 183.3 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 264.98 ms. Allocated memory is still 200.3 MB. Free memory was 183.3 MB in the beginning and 167.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5718.07 ms. Allocated memory was 200.3 MB in the beginning and 289.4 MB in the end (delta: 89.1 MB). Free memory was 166.7 MB in the beginning and 196.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 153.7 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4417.5ms, OverallIterations: 7, TraceHistogramMax: 11, EmptinessCheckTime: 10.3ms, AutomataDifference: 1025.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1237.5ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 249 SDtfs, 235 SDslu, 1032 SDs, 0 SdLazy, 925 SolverSat, 156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 545.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 328 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 532.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=6, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 98.9ms AutomataMinimizationTime, 7 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 70 PreInvPairs, 93 NumberOfFragments, 620 HoareAnnotationTreeSize, 70 FomulaSimplifications, 897 FormulaSimplificationTreeSizeReduction, 130.0ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 1112 FormulaSimplificationTreeSizeReductionInter, 1096.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 61.7ms SsaConstructionTime, 159.3ms SatisfiabilityAnalysisTime, 1501.1ms InterpolantComputationTime, 334 NumberOfCodeBlocks, 334 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 327 ConstructedInterpolants, 0 QuantifiedInterpolants, 1457 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1015 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 396/427 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: 47]: Loop Invariant Derived loop invariant: ((((((q == 0 && x == r) && x <= 2) && 1 <= y) && b == y * a) && a == 2) && 2 * (b / 2) <= r) || ((((((q == 0 && b == y) && x == r) && x <= 2) && y <= r) && 1 <= y) && b == y * a) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((y <= (x + r * -1) / 2 && x <= 2) && 1 <= y) && b == y * a) && r / -2 < 1) && q == 2) || ((((((x == y + r && x < 2 * y) && b == y) && x <= 2) && b == y * a) && q == 1) && y <= x)) || (((((((q == 0 && x == r) && 0 <= x) && x <= 2) && 1 <= y) && b == y * a) && a == 0) && y <= 2) RESULT: Ultimate proved your program to be correct! Received shutdown request...